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BWI - STL

$72 Find cheap flights from Baltimore to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Baltimore to St. Louis departing on 7/15. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 7/11
Thu 7/18

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Baltimore to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

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Cheap flight deals from Baltimore to St. Louis (BWI-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Baltimore to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:00 pm - 4:20 pmBWI-STL
23h 20m1 stop
7:57 am - 8:25 pmSTL-BWI
11h 28m1 stop
$130Spirit Airlines
Find Deal
Fri, Sep 6 - Wed, Sep 11
9:00 am - 4:20 pmBWI-STL
8h 20m1 stop
5:20 pm - 1:12 amSTL-BWI
6h 52m1 stop
$133Spirit Airlines
Find Deal
Tue, Sep 10 - Thu, Sep 12
1:03 pm - 9:37 amBWI-STL
21h 34m1 stop
7:57 am - 8:25 pmSTL-BWI
11h 28m1 stop
Fri, Sep 13 - Tue, Sep 17
3:25 pm - 7:02 amBWI-STL
16h 37m1 stop
6:42 pm - 8:52 amSTL-BWI
13h 10m1 stop
$149Frontier
Find Deal
Wed, Aug 28 - Fri, Aug 30
8:10 pm - 4:20 pmBWI-STL
21h 10m2 stops
7:57 am - 8:25 pmSTL-BWI
11h 28m1 stop
$150Spirit Airlines
Find Deal
Fri, Sep 13 - Tue, Sep 17
8:54 pm - 9:25 amBWI-STL
13h 31m1 stop
7:33 pm - 7:50 amSTL-BWI
11h 17m1 stop
$151Frontier
Find Deal
Tue, Jul 9 - Tue, Jul 16
6:02 pm - 11:54 pmBWI-STL
6h 52m1 stop
9:24 am - 5:15 pmSTL-BWI
6h 51m1 stop
$185American Airlines
Find Deal
Wed, Jul 31 - Sat, Aug 3
5:00 am - 8:30 amBWI-STL
4h 30m1 stop
5:46 pm - 11:55 pmSTL-BWI
5h 09m1 stop
$190American Airlines
Find Deal
Fri, Jul 12 - Fri, Jul 19
5:45 am - 10:57 amBWI-STL
6h 12m1 stop
8:02 pm - 12:39 pmSTL-BWI
15h 37m1 stop
Tue, Jun 25 - Wed, Jun 26
9:10 am - 10:20 amBWI-STL
2h 10mnonstop
5:25 pm - 8:25 pmSTL-BWI
2h 00mnonstop
$361Southwest
Find Deal
Mon, Jul 15 - Wed, Jul 17

Flights from Baltimore to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Baltimore to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Baltimore to St. Louis?

The average price of all flights from Baltimore to St. Louis clicked on KAYAK for each day over the last 12 months.
For Baltimore to St. Louis, Wednesday is the cheapest day to fly on average and Monday is the most expensive. Flying from St. Louis back to Baltimore, the best deals are generally found on Tuesday, with Sunday being the most expensive.

What is the cheapest month to fly from Baltimore to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Baltimore to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Baltimore to St. Louis is January, where tickets cost $290 on average. On the other hand, the most expensive months are May and March, where the average cost of tickets is $386 and $378 respectively.

How far in advance should I book a flight from Baltimore to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Baltimore to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Baltimore to St. Louis, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 73 days before departure.

Which airlines provide the cheapest flights from Baltimore to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 72 hours, the cheapest one-way ticket from Baltimore to St. Louis found on KAYAK was with Spirit Airlines for $72. Spirit Airlines proposed a round-trip connection from $130 and Frontier from $149.

Which airlines fly non-stop between Baltimore and St. Louis?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Baltimore to St. Louis.
There is just one airline that flies from Baltimore to St. Louis direct and that is Southwest. The best one-way deal found from Southwest for the route is $326.

How many flights are there between Baltimore and St. Louis per day?

Each day, there are between 4 and 9 nonstop flights that take off from Baltimore and land in St. Louis, with an average flight time of 2h 12m. The most common departure time is 1:00 pm and most flights take off in the afternoon. Each week, there are 48 flights. The most frequent day of departure is Monday, when 19% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Baltimore and St. Louis?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from Baltimore to St. Louis take?

The average nonstop flight takes 2h 10m, covering a distance of 736 miles.

What’s the earliest departure time from Baltimore to St. Louis?

Early birds can take the earliest flight from Baltimore at 6:15 am and will be landing in St. Louis at 7:30 am.

What’s the latest departure time from Baltimore to St. Louis?

If you prefer to fly at night, the latest flight from Baltimore to St. Louis jets off at 9:20 pm and lands at 10:35 pm.

Good to know

Low season

February

High season

July

Cheapest flight

$72
Best time to beat the crowds but there is an average 1% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Baltimore to St. Louis

When to book flights from Baltimore to St. Louis

Are your dates flexible? Find out the best times to travel from Baltimore to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Baltimore to St. Louis

  • What is the cheapest flight from Baltimore to St. Louis?

    In the last 3 days, the lowest price for a flight from Baltimore to St. Louis was $72 for a one-way ticket and $130 for a round-trip.

  • Do I need a passport to fly between Baltimore and St. Louis?

    No, a passport isn't needed to fly from Baltimore to St. Louis. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Baltimore to St. Louis?

    When flying out of Baltimore you will be using Baltimore/Washington. You will be landing at St. Louis, also known as Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from Baltimore to St. Louis?

    Only American Airlines offers inflight Wi-Fi service on the Baltimore to St. Louis flight route.

  • Which aircraft models fly most regularly from Baltimore to St. Louis?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Baltimore to St. Louis flight route.

  • On which days can I fly direct from Baltimore to St. Louis?

    There are nonstop flights from Baltimore to St. Louis on a daily basis.

  • Which is the best airline for flights from Baltimore to St. Louis, Southwest or American Airlines?

    The two airlines most popular with KAYAK users for flights from Baltimore to St. Louis are Southwest and American Airlines. With an average price for the route of $431 and an overall rating of 8.1, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $487 and an overall rating of 7.3.

  • How does KAYAK find such low prices on flights from Baltimore to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Baltimore to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Baltimore to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Baltimore is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Baltimore to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Baltimore with another airline. Booking your flights between Baltimore and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Baltimore to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Baltimore up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Baltimore to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $346 or less round-trip.

Prefer to fly non-stop from Baltimore to St. Louis?

Find which airlines fly direct from Baltimore/Washington to Lambert-St Louis, which days they fly and book direct flights.

Nonstop departures

Baltimore/Washington to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Nonstop returns

Lambert-St Louis to Baltimore/Washington

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from Baltimore to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Baltimore to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Baltimore to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.1
SouthwestOverall score based on 5889 reviews
7.8Entertainment
7.3Food
8.3Boarding
8.7Crew
8.1Comfort
Airline reviews

it was a short flight, so no refreshments. Could've used some water since I was running from the end of one terminal to the end of another to catch this flight

10.0 ExcellentAnonymous, May 2024BWI - BDL
Read more about Southwest reviews

it was a short flight, so no refreshments. Could've used some water since I was running from the end of one terminal to the end of another to catch this flight

Because of storms in St Louis, plane was diverted to Kansas City. After about 1 hour stay went back to st Louis to finally reach distanation. Made for long day. But southwest took care of us. Can't fight mother nature

Easier that prior flight. The airline attendants didn’t really do most of their job as I noted in prior email.

Worse experience especially since there were delays and unreasonable accommodations made

The crew at the gate in Baltimore were rude and intimidating and insensitive to the needs of traveling families. They treated us like nuisance children ruining their day rather than the reasons they were working, paying customers with children who were anxious about the boarding experience. I would only travel Southwest again if it were the only option, especially if traveling with my children.

With COVID still around, I wish they wouldn't bunch us up so much at the boarding gates.

sw cancelled our flight 2 hours before we were to leave. Our bags were already checked. Only communication we had was a text that had a link to reschedule that did not work. When we finally got to front of line ticket agent said they could not get us on a flight until Wednesday. This was Sunday. 3 days. The. They stated since it was “weather” related they would not give us vouchers for food, hotel stay anything. So we had to book on a different airline costing us an extra $1000. Unacceptable.

Pleasant and responsive flight attendants. Adequate drinks menu Good sized, comfortable seats

I never like the fact that if I don't check in exactly 24 hours before the flight time, I get to board C, and that means sitting between 2 individuals. I would like assigned seating in the airplanes.

Two hour delay including one of them on the tarmac second year in a row we’ve had a bad experience. Sad that Southwest is no longer a bargain and has failed to keep up the customer service they were once so famous for.

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Paid for premium economy had no tv the whole time the crew tried to reset/reboot but would not work they said they would put a trouble ticket in for it. We had 3 seats my tv was the only one that didn't work. They cancelled our flight re worked us on another that left us at airport over night on the floor I have a ten year old and a 78 diabetic mother which also had shingles and suffers from nerve pain in legs and back. Requested wheelchair service at all airports after the re route NO wheelchair service was there to help. WORST experience we have ever had. Went to American airlines assistance it was closed. I AM FURIOUS!!! I expect some sort of compensation from this traumatic experience and no need for flying points we don't plan on using American airlines again!!!!

This is by far the worst experience I have had with American Airlines. The start of this trip was a complete disaster. I purposely planned my trip so that I would weather any delays so that I could make very important meeting at the Pentagon. My flight was cancelled because of maintenance and I was put on the first flight the next day but I was late to the meeting. After a long week at the Pentagon I just wanted to go home and my flight home which was early in the day was delayed. Eventually the flight was delayed until the next day. I was not authorized a hotel room because DCA was my point of origin. So I paid for a hotel out of pocket. The flight this morning was boarded then deplaned because the aircraft was hot. The flow of information was not happening in DCA and made it worse when the news was bad. I am going to take a break from American for my next few military flights. Hopefully whatever has been going on with American Airlines will be resolved.

We had a 2 hour delay. The seats were smaller than most other airlines. The person in front of us wanted to lay back and we had to stop her because she was pressing against my girlfriend’s legs. We had to ask her to sit up and not lay back due to the lack of room.

Everything was fine once we actually got on our flight. It was more then annoying they canceled (delayed) our flight. We lost out on a day of our trip along with money on our stay. Plus we had to book another hotel. So expensive.

This flight was canceled and delayed several times without explanation. The plane was freezing cold and no wifi for messaging. Getting off the plane was terribly unorganized and felt like it took forever….

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Terrible. I didn’t fly and I had an important meeting the next day.

Equipment swap led to 2+ hour delay on international flight. And to top it off, boarding took forever.

My flight was uncomfortable and crammed. There were no pockets to store things, I couldn’t move my seat back slightly. Beverages including soda cost extra. My husband flew on another spirit airline flight, which was delayed a total of 48 hours, only to be canceled.

Two delays in less than 24hrs. They need to improve everything and restructure the whole company.

Terrible leg room, seats don’t recline, delayed flight, and even water isn’t free onboard

Flight was canceled less than 6 hours before takeoff, rebooked on a flight that was twice as long and left earlier so we couldn’t make it, when using text support option took over 2 hours to speak with someone.

Not enough help at airport during boarding process. Flight was delayed. Overall WORST flying experience I’ve ever had. Will NEVER FLT SPIRIT AGAIN

Terrible legroom, seats do not recline, tray table the size of an iPhone, delayed flight, have to pay 5$ to get a cup of water onboard.

Could have TV/Movie and some water ou soda free

Flight was good and clean but delayed over an hour on the return flight.

The non stop flight and able to go into Atlantic City airport. They could lower the prices. It starts out low but then if you want to bring luggage and pick your seat the price goes up quite a bit.

Flight got diwngraded last minute and left us stranded. I was told I’ll be given credit for my luggage and seat upgrades but haven’t got anything yet

Did not realize seats did not recline. Best to travel in an exit row... No question

I strongly dislike Frontier. I find them barebones, the seats not particularly comfortable, the nickel and diming is maddening, the app is TERRIBLE - super confusing to navigate, and the last 4 frontier flights I have flown have been on AVERAGE 2 hours late, one ruining a fancy night out in Vegas with reservations made well in advance, which was nodded to with a measly 5000 miles, which translates to almost nothing. At least credit a free checked bag or something.

8 hr delay. had to buy another ticket with another airline

Four and a half hour delay in total. What frustrates me most is the poor communication and disorganization.

I appreciated the upgrade to free cary-on bag and seat selection at no charge

FRONTIER SUCKS! The agent downstairs tricked me into booking, just to get to the gate. At the gate, they told me they couldn't help. I then called Customer Service. They and the gate attendants kept blaming each other. Neither side was willing to help the customer.

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

Didn't like anything..entire crew was very rude to everyone on the flight. Plane old and the trays fall down on you the while time you're flying. Charged more for a carry on bag than for the plane ticket itself. Did make it from point a to point b, but worth the extra money to fly with another airline

9 hours of delay!! Was not able to check my luggage that I paid for!!!

Book cheap flights from Baltimore to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Baltimore to St. Louis found on KAYAK in the last 72 hours.
7/15Mon
1 stopSpirit Airlines
11h 46mBWI-STL
$72
7/9Tue
1 stopFrontier
13h 31mBWI-STL
$75
7/15Mon
2 stopsSpirit Airlines
22h 03mBWI-STL
$91
7/9Tue
2 stopsSpirit Airlines
9h 23mBWI-STL
$97
6/24Mon
2 stopsSpirit Airlines
13h 12mBWI-STL
$110
6/24Mon
1 stopSpirit Airlines
16h 38mBWI-STL
$113
6/24Mon
2 stopsFrontier
16h 33mBWI-STL
$119
6/26Wed
1 stopSpirit Airlines
19h 43mBWI-STL
$120
6/14Fri
1 stopAmerican Airlines
7h 10mBWI-STL
$239
7/9Tue
2 stopsAmerican Airlines
10h 26mBWI-STL
$317

Search by stops

Search by airline

Search by price

Last minute flights from Baltimore to St. Louis

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Baltimore to St. Louis that are departing in the next 10 days.
6/15Sat
multi-stop
22h 00mBWI-STL
7/4Thu
multi-stop
13h 13mSTL-BWI
$254
6/15Sat
multi-stopUndisclosed Carrier
22h 14mBWI-STL
6/18Tue
multi-stopUndisclosed Carrier
16h 12mSTL-BWI
$278
6/15Sat
multi-stopFrontier
22h 00mBWI-STL
7/5Fri
multi-stopFrontier
22h 15mSTL-BWI
$280
6/15Sat
multi-stopFrontier
22h 00mBWI-STL
6/18Tue
multi-stopFrontier
11h 03mSTL-BWI
$315
6/15Sat
multi-stopFrontier
22h 00mBWI-STL
6/18Tue
multi-stopFrontier
11h 03mSTL-BWI
$318
6/15Sat
multi-stopSpirit Airlines
18h 48mBWI-STL
7/2Tue
multi-stopSpirit Airlines
10h 53mSTL-BWI
$382
6/15Sat
multi-stopSpirit Airlines
18h 48mBWI-STL
7/4Thu
multi-stopSpirit Airlines
13h 13mSTL-BWI
$383
6/14Fri
multi-stopAmerican Airlines
4h 47mBWI-STL
6/21Fri
multi-stopAmerican Airlines
6h 14mSTL-BWI
$451
6/13Thu
multi-stopDelta
5h 20mBWI-STL
6/16Sun
multi-stopDelta
5h 44mSTL-BWI
$478
6/13Thu
multi-stopDelta
4h 10mBWI-STL
6/15Sat
multi-stopDelta
8h 07mSTL-BWI
$1,065

Search by stops

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Baltimore - St. Louis Flights

Departure:

Baltimore (BWI)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Baltimore

Cabin classes:

$346