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Find cheap flights from Philadelphia to Illinois from $33

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 6/11. 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
Mon 7/1
Mon 7/8

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Best Illinois Flight Deals

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

Chicago
Chicagononstop$55
Moline
Moline1 stop$518
Peoria
Peoria2 stops$400
Bloomington
Bloomington1 stop$588
Champaign
Champaign1 stop$376
Paducah
Paducah2 stops$430
St. Louis
St. Louisnonstop$58

Good to know

Low season

January

High season

July

Cheapest flight

$33
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 19% 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 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 10419 reviews
8.0Entertainment
8.2Boarding
7.9Comfort
7.4Food
8.6Crew
Airline reviews

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

10.0 ExcellentBarb, Jun 2024MSP - JFK
Read more about Delta reviews

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.

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

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.

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.

There were delays on both ends. It made it less than excellent. This plane was great though

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!

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.

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.

It was ridiculously hard to check in for the flight, and Frontier charged us a LOT of money to have a carry on suitcase, and then told everyone we could not carry on bags and had to check them through at the gate, and didn't refund the extra money we paid to have the suitcase as carry on.

I had a terrible experience with Frontier. I arrived before the 60 minute cut off and was told that Frontier has a two hour window for bags. I was then told the next available flight wasn’t until the end of the day (I had booked a 6am flight). I took a look around and saw other people being told that they could not board their flights or that they had to pay additional fees. I opted to rebook on American Airlines. There’s absolutely no straightforward way to contact Frontier, so this ticket was a complete waste of money. Oh - and the kicker is that the lady lied about the two hour cut off.

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.

Book cheap flights from Philadelphia to Illinois

Recent round-trip flight deals

6/11Tue
nonstopFrontier
2h 12mPHL-MDW
6/12Wed
nonstopFrontier
2h 01mMDW-PHL
$55
6/12Wed
nonstopFrontier
2h 11mPHL-MDW
6/13Thu
nonstopFrontier
2h 01mMDW-PHL
$56
9/11Wed
1 stopSpirit Airlines
11h 06mPHL-ORD
9/16Mon
1 stopSpirit Airlines
13h 28mORD-PHL
$93
9/11Wed
1 stopSpirit Airlines
9h 02mPHL-STL
9/17Tue
1 stopSpirit Airlines
7h 27mSTL-PHL
$110
6/18Tue
nonstopAmerican Airlines
2h 42mPHL-STL
6/19Wed
nonstopAmerican Airlines
2h 16mSTL-PHL
$131
7/24Wed
nonstopAmerican Airlines
2h 27mPHL-STL
7/31Wed
nonstopAmerican Airlines
2h 14mSTL-PHL
$133
7/21Sun
1 stopDelta
4h 11mPHL-ORD
7/24Wed
1 stopDelta
3h 48mORD-PHL
$176
6/11Tue
1 stopDelta
6h 01mPHL-STL
6/12Wed
1 stopDelta
4h 09mSTL-PHL
$194
6/15Sat
nonstopUnited Airlines
2h 24mPHL-ORD
6/15Sat
nonstopUnited Airlines
2h 13mORD-PHL
$201
7/27Sat
1 stopUnited Airlines
7h 36mPHL-STL
7/30Tue
1 stopUnited Airlines
5h 59mSTL-PHL
$263

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Recent one-way flight deals

6/11Tue
nonstopFrontier
2h 21mPHL-ORD
$33
7/9Tue
nonstopFrontier
2h 13mPHL-MDW
$33
9/24Tue
1 stopSpirit Airlines
12h 30mPHL-ORD
$54
7/2Tue
1 stopSpirit Airlines
16h 50mPHL-ORD
$56
7/4Thu
nonstopAmerican Airlines
2h 39mPHL-STL
$66
8/30Fri
nonstopAmerican Airlines
2h 21mPHL-ORD
$79
6/11Tue
1 stopDelta
8h 10mPHL-ORD
$88
6/8Sat
1 stopDelta
3h 48mPHL-MDW
$88
6/23Sun
nonstopUnited Airlines
2h 24mPHL-ORD
$91
6/8Sat
1 stopUnited Airlines
7h 16mPHL-STL
$95

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Last minute flights from Philadelphia to Illinois

Last minute flight, train and bus deals

6/6Thu
nonstopFrontier
2h 21mPHL-ORD
6/19Wed
nonstopFrontier
2h 02mORD-PHL
$58
6/6Thu
nonstopFrontier
2h 21mPHL-ORD
6/11Tue
nonstopFrontier
2h 02mORD-PHL
$76
6/6Thu
nonstopAmerican Airlines
2h 23mPHL-ORD
6/10Mon
nonstopAmerican Airlines
1h 58mORD-PHL
$181
6/5Wed
multi-stopSpirit Airlines
11h 18mPHL-ORD
6/11Tue
multi-stopSpirit Airlines
19h 06mORD-PHL
$186
6/5Wed
multi-stopSpirit Airlines
23h 05mPHL-ORD
6/11Tue
multi-stopSpirit Airlines
19h 06mORD-PHL
$196
6/4Tue
nonstopAmerican Airlines
2h 38mPHL-STL
6/8Sat
nonstopAmerican Airlines
2h 17mSTL-PHL
$221
6/6Thu
multi-stopDelta
4h 06mPHL-MDW
6/15Sat
multi-stopDelta
4h 24mMDW-PHL
$227
6/5Wed
multi-stopDelta
6h 19mPHL-ORD
6/15Sat
multi-stopDelta
4h 24mORD-PHL
$233
6/2Sun
multi-stopUnited Airlines
11h 57mPHL-MLI
6/5Wed
multi-stopUnited Airlines
14h 03mMLI-PHL
$847
6/2Sun
multi-stopUnited Airlines
11h 57mPHL-MLI
6/5Wed
multi-stopUnited Airlines
17h 42mMLI-PHL
$852

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Philadelphia - Illinois Flights