Find flights
Deals
When to book
FAQs & Tips
Airlines

Find cheap flights from Philadelphia to Illinois from $34

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Illinois departing on 8/31. 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
jue. 6/27
jue. 7/4

Search hundreds of travel sites at once for deals on flights to Illinois

In the last 7 days travelers have searched 42,816,550 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Best Illinois Flight Deals

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

Chicago
Chicagononstop$58
Moline
Moline1 stop$415
Peoria
Peoria2 stops$287
Bloomington
Bloomington1 stop$303
St. Louis
St. Louisnonstop$90

Good to know

Low season

January

High season

July

Cheapest flight

$34
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly and prices are also 15% lower on average.
Flight from Philadelphia to Chicago O'Hare Airport

FAQs - booking Illinois flights

  • How does KAYAK find such low prices on flights from Philadelphia 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 Philadelphia to Illinois.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Illinois from Philadelphia 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 Philadelphia 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 Philadelphia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia 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 Philadelphia 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 Philadelphia to the following destinations at these prices or less: Chicago $96 one-way - $174 round-trip
  • Morning departure is around 1% cheaper 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 Philadelphia to Illinois

 
Need help choosing which airline to fly with from Philadelphia 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 10502 reviews
8.2Boarding
7.4Food
7.9Comfort
8.6Crew
8.0Entertainment
Airline reviews

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!

10.0 ExcellentMichael, May 2024SJC - ATL
Read more about Delta reviews

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.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

They were an hour late and they didn’t have my wheelchair for me

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

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 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!

Awful…flight was delayed more than 12hrs, missed all connections to Fort Wayne, IN, had to get flight to another city 2 hours from my destination, flight was again delayed by 40 mins because they did not have enough fuel, again missed a connection, finally arrived in Indiana at 11pm…but before my 2 hour drive home, ay, no Five That Our Luggage Never Made On The plane and Still In Chicago

Boarding was friendly and quick. While the plane model was older with no live tv, the entertainment was full of movies and tv shows. All food was available. Pilots were very communicative with status of the flight. Flight landed on time.

Flight was delayed by over an hour and gate checked bags took 15 minutes to be delivered to the jet bridge.

The Palm Springs to Chicago O’Hare was on Time and Palm Springs airport is easier navigate. As our connection was only an approximately 50 minutes, we asked staff for insights for the Chicago airport in terms of transferring into the other terminal from which our flight left, and they were unhelpful. However, the United App was very helpful in terms of notifications and even providing directions. The Chicago to Detroit flight was significantly delayed which we all know does happen. However, there were very few updates or notifications as to why this was happening when we would actually arrive. It took nearly 30 minutes for bags to make it to baggage claim. We arrived nearly 1 hour late on a 40 minute flight.

Flight cancelled due to fog. No other flights available for 36 hours. Directed by United to book passage on another carrier, and submit receipts for reimbursement. Did that. United now states they will not reimburse. Currently out 2 grand.

Attendants were rude. Scowling. Seats were miserable and we paid extra.

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

Same basket of unhealthy prepackaged snacks (junk food) which was depleted by the time it got to my row!!

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

Flight from PHL to PHX arrived 50 minutes early and a gate was available. First class flight attendant Stephanie was very friendly and polite. Sanitizing wipes should be provided with meals in addition to refresher towels.

flight delayed so missed connection and this had to rebook for next day

Flight departed PHL one hour late due to late arrival of aircraft. On board services were okay. First class menu does not offer any new items; same desserts (cheese & crackers or Mango sorbet). At least there were no credit card promotions during the flight.

After sitting on plane for 7+ hours, flight was canceled. And to makes matters worse, my suitcase is in baggage hell!

Terrible Ticketing and Check in process. I learned that AA unilaterally cancelled my premium seating from PHL to CLT and from CLT to JAN. They did, however, refund my money, but my seating was subsequently severely downgraded. They didn’t have a seat for my unless I paid for it! Not cool! Consequently, Check-in took 45 min. AA is usually great, but this was my worst experience with AA ever. Appalling they they arbitrarily cancel my seats threatening loss of flight if I didn’t pay for a seat!!!! -John

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.

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!

First....my trip was from Ft. Myers to Philly (not the other way around). Plane was clean, staff was friendly and flight was efficient with boarding and flight time. Thumbs up all around.

Seats are very small and extremely hard. Too close together. The person next to me had average shoulders and was very far into my 'space'.

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.

Flights are great except for the ticketing service on the terminal.. Too little employees taking care for lots of flights.

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 won’t help you at the airport without paying $25. Carry on was $75. Then you get on the plain and every beverage or snack is also a charge. Seats are hard and real packed in. I would never fly them again.

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

My experience with frontier staff at the Denver airport was absolutely horrible. The manager on duty was even worst if was the worst experience I have ever had, I have never been treated so poorly as a customer in my life! The staff was extremely rude, eye rolls and attitude and then refusal to help me at all. I wish I could never fly frontier again that’s how horrible it was!

The Frontier app wasn’t working. So I could not pay for a carry on the week prior to flying. They charged me 99$ at the gate to carry on a duffle bag.

Good for the price. My only complaint is that the pilot should keep the air flowing while passengers are waiting to getting out of airplane.

Plane could have been more on time. More leg room .

I arrived 1 hour prior to boarding, and they said I was too late for a domestic flight. First time I heard that :-(

Check in online was easy. Seats aren’t very comfortable

Fecal matter in seat back pocket. Presumably from a kids diaper.

Worst airline to travel with. They treat you like a prisoner in a jailhouse barking out orders and threats. Nickle and dime you to the same price or higher than a respectable airline like one of the big 3 . Might as well fly with standard airlines

Book cheap flights from Philadelphia to Illinois

Recent round-trip flight deals

6/11mar.
nonstopFrontier
2h 21mPHL-ORD
6/13jue.
nonstopFrontier
2h 02mORD-PHL
$58
6/25mar.
nonstopFrontier
2h 12mPHL-MDW
7/2mar.
nonstopFrontier
2h 02mMDW-PHL
$58
6/10lun.
1 stopSpirit Airlines
8h 43mPHL-ORD
6/11mar.
1 stopSpirit Airlines
13h 20mORD-PHL
$99
7/2mar.
nonstopAmerican Airlines
2h 23mPHL-ORD
7/5vie.
nonstopAmerican Airlines
1h 57mORD-PHL
$117
6/11mar.
1 stopSpirit Airlines
27h 01mPHL-ORD
7/10mié.
1 stopSpirit Airlines
13h 33mORD-PHL
$119
7/2mar.
nonstopAmerican Airlines
2h 23mPHL-ORD
7/6sáb.
nonstopAmerican Airlines
1h 57mORD-PHL
$124
6/22sáb.
1 stopDelta
3h 47mPHL-ORD
7/4jue.
1 stopDelta
7h 06mORD-PHL
$176
8/21mié.
1 stopDelta
7h 52mPHL-MDW
8/24sáb.
1 stopDelta
4h 25mMDW-PHL
$176
8/15jue.
1 stopUnited Airlines
5h 17mPHL-STL
8/16vie.
1 stopUnited Airlines
5h 59mSTL-PHL
$195
7/30mar.
1 stopUnited Airlines
6h 40mPHL-ORD
8/8jue.
nonstopUnited Airlines
2h 08mORD-PHL
$224

Search by stops

Search by airline

Search by price

Recent one-way flight deals

8/31sáb.
nonstopFrontier
2h 24mPHL-ORD
$34
8/20mar.
nonstopFrontier
2h 24mPHL-ORD
$39
6/12mié.
1 stopSpirit Airlines
11h 18mPHL-ORD
$42
8/27mar.
1 stopSpirit Airlines
13h 17mPHL-ORD
$45
6/11mar.
nonstopAmerican Airlines
2h 36mPHL-STL
$66
8/28mié.
nonstopUnited Airlines
2h 24mPHL-ORD
$66
6/27jue.
nonstopUnited Airlines
2h 24mPHL-ORD
$86
7/11jue.
1 stopDelta
4h 11mPHL-ORD
$88
6/6jue.
1 stopDelta
5h 21mPHL-MDW
$88
8/30vie.
nonstopAmerican Airlines
2h 21mPHL-ORD
$91

Search by stops

Search by airline

Search by price

Last minute flights from Philadelphia to Illinois

Last minute flight, train and bus deals

5/29mié.
nonstopFrontier
2h 22mPHL-ORD
6/5mié.
nonstopFrontier
2h 02mORD-PHL
$108
5/29mié.
nonstopFrontier
2h 27mPHL-STL
6/26mié.
nonstopFrontier
2h 12mSTL-PHL
$108
6/1sáb.
multi-stopSpirit Airlines
21h 55mPHL-ORD
6/5mié.
multi-stopSpirit Airlines
13h 20mORD-PHL
$225
6/2dom.
multi-stopSpirit Airlines
27h 55mPHL-ORD
6/29sáb.
multi-stopSpirit Airlines
11h 50mORD-PHL
$227
5/29mié.
multi-stopDelta
4h 20mPHL-ORD
6/5mié.
multi-stopDelta
6h 51mORD-PHL
$233
5/31vie.
multi-stopDelta
6h 05mPHL-ORD
6/7vie.
multi-stopDelta
7h 03mORD-PHL
$270
5/30jue.
multi-stopAmerican Airlines
4h 51mPHL-ORD
5/30jue.
nonstopAmerican Airlines
1h 57mORD-PHL
$274
5/29mié.
multi-stopAmerican Airlines
4h 56mPHL-ORD
6/29sáb.
multi-stopAmerican Airlines
4h 44mORD-PHL
$282
5/31vie.
multi-stopUnited Airlines
8h 00mPHL-MLI
6/30dom.
multi-stopUnited Airlines
6h 38mMLI-PHL
$710
6/1sáb.
multi-stopUnited Airlines
11h 57mPHL-MLI
6/3lun.
multi-stopUnited Airlines
7h 53mMLI-PHL
$746

Search by stops

Search by airline

Search by price

Philadelphia - Illinois Flights