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Find cheap flights from San Antonio to Illinois from $56

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Antonio to Illinois departing on 9/11. 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
Sat 7/6
Sat 7/13

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Best Illinois Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Chicago
Chicago1 stop$110
Moline
Moline1 stop$317
Champaign
Champaign1 stop$346
St. Louis
St. Louis1 stop$139

Good to know

Low season

February

High season

June

Cheapest flight

$56
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from San Antonio to St. Louis

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from San Antonio to Illinois?

    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 San Antonio to Illinois.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Antonio to Illinois?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from San Antonio 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 San Antonio to Illinois?

    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 Illinois with an airline and back to San Antonio with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Antonio to Illinois?

    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 Illinois from San Antonio up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Illinois

  • Looking for a cheap flight? 25% of our users found tickets from San Antonio to the following destinations at these prices or less: Chicago $207 one-way - $385 round-trip
  • Morning departure is around 12% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from San Antonio to Illinois

Need help choosing which airline to fly with from San Antonio to Illinois? 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.
8.0
DeltaOverall score based on 10368 reviews
7.9Comfort
8.6Crew
8.0Entertainment
7.4Food
8.2Boarding
Airline reviews

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

4.0 OkayDavwinder Singh, Jun 2024SEA - ATL
Read more about Delta reviews

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!

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

I had a great flight. Everything went smoothly and the flight arrived early.

The flight and boarding were easy peasy. I was traveling with my 4-year-old, so a smooth boarding experience was especially appreciated. My only piece of feedback is really about where our gate was in O'Hare. They've shoved four gates into a tiny corner of the B terminal and there isn't early enough room or seating for everyone. Not United's problem, but did dent the overall experience.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

I was told we'd have a hot breakfast option in first class, so I chose not get a hot breakfast. It was a very strange meal, but the fresh fruit was very good quality. Service was excellent from ORD to ELP. No service from MBS to ORD, not even water. However, when flying American from FNT to ORD, which is a shorter flight, they at least pass out snacks and offer water.

The delays (5 hrs) were a comedy of errors, and the multiple safety issues encountered were very concerning.

The customer service was excellent! Check-in, baggage check-in, boarding, the flight went very smooth.

The flight was delayed instead of leaving at 11 it left at 12.20

United WiFi is consistently unusable (it can take 10 mins to load a single web page). If you need Wifi to do work, be prepared to lose half a day of productivity.

Good movies, iffy pay WiFi, food ok- on time though and that was great!

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

The CX617 from HK to BKK was delayed more than 1.5 hours.

This flight is frequently delayed. The connections seemingly are more frequently delayed. I’ve missed connections as a result twice on the same route to charlotte then Charleston. Final destination arrival has been the next day, twice in a row. No pilots, no crew. Too many excuses. Unfortunately, my days with American are over.

Entertainment was okay not because anything was wrong but it is a short flight so having no wifi is annoying but understandable. Crew was outstanding as usual

Those seats were way too narrow. I had the middle seat, one person was a very skinny person and we still couldn’t avoid touching each other anytime one of us moved. The other person was larger and we were basically sitting in each others lap the entire flight. There was zero entertainment. The flight was long enough to justify tvs, but no. Gotta sit there in your infant seat and twiddle your thumbs.

Flight was fine. It took an unusually long time to have baggage delivered to the carousel in ORD.

Average - flew with Jet Blue internal and it was far more comfortable and better food and entertainment. Notable difference

The flight got canceled due to mechanical issues, and he to be rebooked and missed my appointments for that day

The flight was scheduled to depart DCA at 12:30 pm but was delayed twice on the ground so that we were finally scheduled to depart at around 4:00 pm. Once we boarded, it was announced that takeoff would be delayed again to fix a hydraulic problem which delayed our eventual takeoff until around 5:00 pm. Once we departed, it was a smooth flight back to ORD. We did not get any explanation about what caused the original significant delay. In my experience, this happens frequently with AA.

The only problem experienced was a ground stop in Chicago due to weather. But the crew handled everything professionally. They prioritized rebooking those passengers who had connecting flights and then deplaning the other passengers. When the hold was lifted, they efficiently re-boarded all the passengers so that we could depart before our departure limit expired.

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

Crew was nice, explained emergency protocol very well. Flight took off and arrived on time. Pilot explained the small delay that occurred with docking and providing updates. I would definitely fly spirit again.

I had no legroom, although I paid for extra legroom. I could barely put my bag in front of my feet and under the seat. The Wi-Fi was horrible. In fact the flight attendant said that they had to reboot it and see if it was going to work and never did.

The seat are terrible. Don’t even think of sleeping on a Spirit flight. The kids that run the plane aka flight attendants are pretty rude and straight forward. They get the job done but without class.

I had a death in my family and booked my flight on Spirit. My flight was cancelled the morning of my flight, no explanation, no help to rebook, nobody to talk to. The next available flight was 2days later !!!! Terrible airline, will NEVER fly with them again!

Terrible as usual!!!! Very unprofessional and rude flight attendants! You get what you pay for! HORRIBLE

They took a horrible route with a lot of turbulence and I eneded up getting sick. Even if the flight takes longer. Don't put people life at risk just to get to the airport on time.

Every thing was fine ,low price,easy on time ,clean, good staff, really no issues

Had to board plan 2x due to lack of security check after 1st boarding

Miserable. The crew was rude, the flight was delayed 5 hours for mechanical reasons and then “weather” even though other planes were leaving.

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!!!

It was delayed 9 hours for operational reasons, despite the plane arriving to the airport on time.

I am very disappointed with Frontier Airlines. They cancelled our flight because they couldn't find a crew member, and then didn't get us to our connecting flight. We had to cancel our whole vacation. We were promised flight and hotel vouchers, but they never sent them.

9hrs delay and didn’t provided anything until after flight landed $75 voucher for fiuture travel no meals or anything.

Worst experience I have seen. The flight was cancelled without any reason.

Well I mean u get what u pay for so 🤷‍♂️

Book cheap flights from San Antonio to Illinois

Recent round-trip flight deals

8/20Tue
1 stopSpirit Airlines
26h 36mSAT-ORD
8/27Tue
1 stopSpirit Airlines
12h 08mORD-SAT
$110
9/10Tue
1 stopSpirit Airlines
21h 49mSAT-ORD
9/16Mon
1 stopSpirit Airlines
24h 58mORD-SAT
$118
9/4Wed
1 stopFrontier
15h 44mSAT-ORD
9/10Tue
1 stopFrontier
22h 14mORD-SAT
$136
9/6Fri
1 stopFrontier
15h 38mSAT-STL
9/9Mon
1 stopFrontier
22h 15mSTL-SAT
$150
6/19Wed
1 stopUnited Airlines
7h 14mSAT-STL
7/10Wed
1 stopUnited Airlines
4h 41mSTL-SAT
$261
7/30Tue
1 stopDelta
5h 19mSAT-STL
7/31Wed
1 stopDelta
5h 47mSTL-SAT
$264
6/26Wed
nonstopAmerican Airlines
2h 52mSAT-ORD
6/30Sun
nonstopAmerican Airlines
2h 44mORD-SAT
$273
7/3Wed
1 stopDelta
6h 42mSAT-STL
7/10Wed
1 stopDelta
7h 22mSTL-SAT
$278
7/2Tue
1 stopAmerican Airlines
7h 57mSAT-ORD
7/16Tue
nonstopAmerican Airlines
2h 40mORD-SAT
$288
6/19Wed
2 stopsUnited Airlines
8h 44mSAT-STL
7/10Wed
1 stopUnited Airlines
4h 41mSTL-SAT
$335

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Recent one-way flight deals

9/11Wed
1 stopSpirit Airlines
16h 54mSAT-STL
$56
8/20Tue
1 stopSpirit Airlines
15h 04mSAT-ORD
$64
8/19Mon
1 stopFrontier
10h 07mSAT-ORD
$70
8/20Tue
1 stopFrontier
11h 53mSAT-MDW
$80
6/30Sun
nonstopAmerican Airlines
2h 52mSAT-ORD
$137
7/1Mon
1 stopDelta
6h 16mSAT-STL
$146
7/5Fri
nonstopAmerican Airlines
2h 55mSAT-ORD
$152
6/27Thu
nonstopUnited Airlines
2h 55mSAT-ORD
$157
7/1Mon
1 stopDelta
5h 08mSAT-MDW
$161
7/3Wed
nonstopUnited Airlines
2h 52mSAT-ORD
$224

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Last minute flights from San Antonio to Illinois

Last minute flight, train and bus deals

6/8Sat
multi-stopFrontier
10h 54mSAT-MDW
7/18Thu
multi-stopFrontier
9h 20mMDW-SAT
$242
6/10Mon
multi-stop
14h 29mSAT-STL
6/12Wed
multi-stop
23h 06mSTL-SAT
$260
6/8Sat
multi-stopSpirit Airlines
12h 44mSAT-ORD
7/18Thu
multi-stopSpirit Airlines
11h 35mORD-SAT
$278
6/11Tue
multi-stopSpirit Airlines
34h 46mSAT-ORD
6/16Sun
multi-stopSpirit Airlines
27h 38mORD-SAT
$279
6/10Mon
multi-stopAmerican Airlines
6h 54mSAT-STL
6/17Mon
multi-stopAmerican Airlines
10h 21mSTL-SAT
$455
6/10Mon
multi-stopDelta
7h 23mSAT-STL
6/17Mon
multi-stopDelta
5h 48mSTL-SAT
$478
6/8Sat
multi-stopUnited Airlines
8h 46mSAT-STL
6/9Sun
multi-stopUnited Airlines
7h 06mSTL-SAT
$483
6/9Sun
nonstopUnited Airlines
2h 51mSAT-ORD
6/30Sun
nonstopUnited Airlines
2h 53mORD-SAT
$539
6/10Mon
multi-stopDelta
5h 46mSAT-ORD
6/13Thu
multi-stopDelta
6h 06mORD-SAT
$668
6/11Tue
nonstopAmerican Airlines
2h 53mSAT-ORD
6/12Wed
nonstopAmerican Airlines
2h 44mORD-SAT
$679

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San Antonio - Illinois Flights

Departure:

San Antonio (SAT)United States

Return flight deals:

Illinois - San Antonio

Cabin classes:

$704
$816
$666
$292