$37 Find Cheap Flights from Philadelphia to Illinois

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 12/6. 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

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Illinois.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Illinois.

Best Illinois Flight Deals

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

Chicago
Chicagononstop$57
Moline
Moline1 stop$228
Peoria
Peoria1 stop$495
Springfield
Springfield1 stop$508
St. Louis
St. Louis1 stop$118

Good to know

Low season

January

High season

July

Cheapest flight

$37
Best time to beat the crowds with an average 23% drop in price.
Most popular time to fly and prices are also 11% 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 $113 one-way - $223 round-trip
  • On average*, there is no price difference when choosing to fly in the morning or the evening on this flight route.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Flights from Philadelphia to Illinois: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Philadelphia to Illinois 
Verified travelerFlew with American AirlinesPHL-ORDJul 2024
Fly out the night before you have anything to do in Chicago so you don’t get delayed and miss out on plans
MarkFlew with American AirlinesPHL-ORDJun 2024
Just say “no” to PHL and ORD. They are both a nightmare for delays and missed connections.

Top 5 airlines serving from Philadelphia to Illinois

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Illinois. 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 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 8755 reviews
7.3Food
8.5Crew
7.9Comfort
8.2Boarding
7.9Entertainment
Airline reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

8.0 ExcellentAndrew, Nov 2024MCO - LGA
Read more Delta reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

Crew was nice. Flight was timely. Seats could be better as well as the food considering it’s first class.

Left on time and arrived early this extending our 31 minute transfer. Bags made it also!

Good and consistent Printer in lounge did not work for me :(

Most of my discomfort was going through TSA. However, the Delta seats had inadequate leg room and I tried my very best to connect to the wi-fi and it was a cumbersome process that finally gave me the info that I needed to sign in AFTER I had completed the flight...Why make it so difficult to use? That said I really really appreciate the pilot taking a little extra time to avoid a bad storm area and both landings in Atlanta and Orlando were flawless to my delight!!!

Delayed in taking off because no flight crew. The in seat entertainment was working properly.

I upgraded to first class only to find out that I still had no access to the sky lounge without a sky miles card or AmEx (something that should be emphasized outside of the fine print!) Also, no food or drink service provided during the flight, so I basically paid 4x more just for “free” checked baggage and a bigger seat. Not worth it.

Delta was really good about being transparent with why we were delayed it’s just that’s the plane was really old and outdated and a lot of the comfort and amenities we know Delta to have did not shine through

Bottom seat cushion is almost non existent. Very uncomfortable seat.

Delta was great the entertainment was outdated. Screen was very small and didn’t work.

They canceled our flight and left us stranded to figure it out

Flight was on time, crew were excellent. For some reason our originally selected seats were changed. We had to re-choose our seats when we checked in online and options were limited. One of our two checked bags we placed on the wrong carousel. It was only be shear luck that I saw it. That cost us 20 minutes of wasted time. So much for the “priority” tags. They are meaningless, and have been ever since they were implemented. I wish you would do the save some money and stop using them.

Everything was very good. Was able to change a make run flight leaving on direct earlier in the app -seamless!!! Well done

Being stick waiting for gate at ORD cause me to almost miss my connecting flight…being deaf United made no no effort to keep me updated as I couldn’t hear the PA

As usual, United scheduling is completely misleading. A 54-minute layover at O’Hare is too short to make a lot of connections, especially since the flight landed “on time” but had to wait on the taxiway 15 minutes for a gate to open up. Then it takes another 10 minutes to exit the plane before one can run to another concourse to catch a connecting flight.

The seats on the aircraft are like sitting in a rock. During the boarding process they recognize Active Duty Military, why don’t they recognize Retired Military. I’ve always preferred Delta, this flight confirmed why I still prefer Delta.

when you can say you don't remember being at any point upset during a flight, the airline is winning .

The staff was very friendly. The seats seemed quite small. Overall the flight was pleasant.

It was literally one of the worst travel experiences ever. My flight got delayed by over an hour and there was no communication of this from the gate staff. I realized it by checking the screen periodically. Once on board the flight attendants continued to serve alcohol to a man who was clearly already drunk and that was making a bunch of commotion. Never again will I fly United!

Charging and entertainment didn't work. The meal was horrible. They only came by with the drink cart one time for the 8 hour flight. They did come by with water a couple times.

My flight back my reservations were list because they said I didn't pay my pet fee when I had a receipt

For coast to coast travel the A321 and even the NEO, even in first class will never be excellent. That would take a B787 or 777 to accomplish.

The one gate agent was very abrupt and rude. Not a good look for American for the day

Departure more than an hour later. Conexion/waiting time at the airport was more than 7 hours :(

I was unhappy with having the seat I chose changed at the last minute. I was moved to an aisle seat which did not recline and was next to the bathroom. The bathroom odors made the flight entirely unpleasant. Having carefully chosen my seat months before I was not pleased with my AA experience. In addition, they ran out of tea during flight service, really?

Pilots showed up late because they decided to stop and get something to eat instead of going straight to our gate, Forcing an 1 1/2 hour delay, and missed flight. Shame on the pilots.

It was a bus not a flight. Okay bus ride.

Our 9:10 am scheduled flight continued to get delayed all day with no information given from the agents as to why. It wasn’t until I went to the customer service desk and got us switched to another flight at 2:44 pm (that wasn’t nonstop like our booked flight) that the agent finally was able to find out it was due to a fuel leak. I don’t know if our original flight ever took off but I don’t find it acceptable to leave people sitting in an airport all day with no explanation.

If there was enough room for me to bring my carry on luggage with me on the flight.

My flights had excessive delays, alleged mechanical problems, and overall terrible customer service

The flight landed with a delay and we had to wait almost an hour to be off boarded. So typical of spirit.

The gate employees and the flight crew were friendly and professional. Afterboarding we waited 20 minutes for another flight; a complimentary beverage would have ben appreciated for the inconvenience.

Very bad flight was delayed. After they boarded us kept us in plane four 4 hours because they didn’t have fuel. Very unprofessional. Plane and bathrooms were very dirty. AC was blowing very cold. After everything went very bad because od them they rebooked connection flight next day more than 12 hours. Didn’t provide hotel voucher. Never going to fly this airline

Spirit cancel my flight. Many times happen in my travels.

Our flight was delayed four hours and staff did nothing to accommodate the issue.

You get what you pay for, but those tickets weren't cheap, so I expected better, but Spirit is just one of those airlines.

My return flight was canceled by the system automatically because I took a different departing flight. Spirit would not refund me for the return flight.

Cancelled the return flight moments before boarding, horrible customer service in assisting with any rebooking. Never again will I fly Spirit.

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.

My first flight was moved 6 hours causing me to miss my meeting. The second was delayed about an hour and a half. Most of the crews apparently dont like their jobs or just working for Frontier. Only one flight attendant wasn"t snappy or rude.

Booked direct in July '24. Turned into a 14 hr layover (both ways) in Denver. My 5 day vaca turned into a 1 day . Not good, BUT,... Thank you for the people @ Frontier who were professionally friendly & approachable.

Stop changing gates at sfo. When you are elderly going back for it’s not fun.

We understand and comply with Frontier’s bag sizes. We’ve had some problems in past while having to await other passengers who do not understand the baggage restrictions or have not prepaid and that is usually our biggest concern (others delaying us) with flying Frontier. Flying OUT of ONT, however, has always been a great experience. I’ve also noted even on delayed Frontier flights very knowledgeable pilots who manage expectations well.

There was no easy way to check in. I don't want to install an app to checkin. I will use alaska from now on because they have a web check in method that is easy.

The crew was ghetto lol I felt like I was on an inner city field trip

Horrible! The short distance flight ended up taking 5 hrs! There was a 3 hr delay for the flight to take off and there was a 70 min wait on the tarmac for some bogus reason that the pilot said the gate he was supposed to board was taken up. After a 30 min wait he said the plane that was supposed to push out of the gate called a medical emergency and 40 min later he ended up boarding another gate. For the initial 3 hr delay there was no information/alert about the gate or delay in the app or the boards up until the boarding time and even beyond! Had to walk all the way to the end of the terminal to find the frontier staff to ask what was going on. Avoid this airline at all costs! If you have carryon bags or checked bags , their prices come equivalent to the prices of more reliable airlines. They are the worst in timeliness at 60% (reported as delayed) this year (check the data) by a high margin even compared to the second worst airline. If you are ok with having a miserable flight experience with the odds close to flip of a coin, feel free to try them. If you value your time , money and flying experience, stay away.

There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr

Delayed for two hours due to trivial issues. No reimbursment. Also on arrival further delay due to terminal malfunction.

Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.

Book cheap flights from Philadelphia to Illinois

Recent round-trip flight deals

 
These are the cheapest round-trip flights from Philadelphia to Illinois found on KAYAK in the last 72 hours.
12/17Tue
nonstopFrontier
2h 26mPHL-MDW
12/24Tue
nonstopFrontier
2h 03mMDW-PHL
$57
12/17Tue
nonstopFrontier
2h 26mPHL-MDW
12/24Tue
nonstopFrontier
2h 03mMDW-PHL
$58
1/8Wed
nonstopAmerican Airlines
2h 26mPHL-ORD
1/11Sat
nonstopAmerican Airlines
2h 01mORD-PHL
$137
12/12Thu
nonstopAmerican Airlines
2h 28mPHL-ORD
12/12Thu
nonstopAmerican Airlines
2h 01mORD-PHL
$151
12/9Mon
nonstopUnited Airlines
2h 24mPHL-ORD
12/10Tue
nonstopUnited Airlines
2h 10mORD-PHL
$171
12/5Thu
nonstopUnited Airlines
2h 24mPHL-ORD
12/25Wed
nonstopUnited Airlines
2h 10mORD-PHL
$174
5/2Fri
1 stopSpirit Airlines
7h 51mPHL-ORD
5/4Sun
1 stopSpirit Airlines
7h 25mORD-PHL
$186
12/11Wed
1 stopDelta
8h 14mPHL-ORD
12/14Sat
1 stopDelta
4h 59mORD-PHL
$196
12/14Sat
1 stopDelta
6h 22mPHL-MDW
12/31Tue
1 stopDelta
4h 23mMDW-PHL
$196
5/12Mon
1 stopSpirit Airlines
26h 31mPHL-ORD
5/15Thu
1 stopSpirit Airlines
16h 20mORD-PHL
$199

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Philadelphia to Illinois found on KAYAK in the last 72 hours.
12/6Fri
nonstopFrontier
2h 28mPHL-ORD
$37
12/6Fri
nonstopFrontier
2h 23mPHL-MDW
$37
1/8Wed
nonstopAmerican Airlines
2h 27mPHL-ORD
$69
12/17Tue
nonstopAmerican Airlines
2h 30mPHL-ORD
$86
12/3Tue
2 stopsSpirit Airlines
14h 14mPHL-ORD
$88
12/24Tue
nonstopUnited Airlines
2h 32mPHL-ORD
$89
2/25Tue
2 stopsSpirit Airlines
21h 02mPHL-ORD
$93
1/21Tue
1 stopDelta
4h 22mPHL-ORD
$98
1/7Tue
1 stopDelta
4h 35mPHL-MDW
$98
12/15Sun
nonstopUnited Airlines
2h 24mPHL-ORD
$99

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Last minute flights from Philadelphia to Illinois

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 Philadelphia to Illinois that are departing in the next 10 days.
11/26Tue
nonstopFrontier
2h 26mPHL-ORD
11/28Thu
nonstopFrontier
2h 06mORD-PHL
$127
11/26Tue
nonstopFrontier
2h 26mPHL-ORD
11/28Thu
nonstopFrontier
2h 06mORD-PHL
$136
11/25Mon
multi-stopDelta
5h 06mPHL-MLI
12/3Tue
multi-stopDelta
6h 48mMLI-PHL
$298
11/25Mon
multi-stopAmerican Airlines
7h 48mPHL-MLI
12/3Tue
multi-stopAmerican Airlines
6h 21mMLI-PHL
$323
11/26Tue
multi-stopSpirit Airlines
19h 28mPHL-ORD
11/28Thu
multi-stopSpirit Airlines
11h 08mORD-PHL
$345
11/25Mon
multi-stopSpirit Airlines
20h 55mPHL-ORD
11/27Wed
multi-stopSpirit Airlines
11h 08mORD-PHL
$349
11/22Fri
multi-stopUnited Airlines
22h 14mPHL-ORD
11/23Sat
nonstopUnited Airlines
2h 00mORD-PHL
$470
11/22Fri
nonstopUnited Airlines
2h 19mPHL-ORD
12/4Wed
nonstopUnited Airlines
2h 04mORD-PHL
$534
11/26Tue
multi-stopDelta
4h 58mPHL-MDW
12/3Tue
multi-stopDelta
6h 13mMDW-PHL
$586
11/25Mon
nonstopAmerican Airlines
2h 34mPHL-STL
11/29Fri
nonstopAmerican Airlines
2h 07mSTL-PHL
$637

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Everything you need to know for your flight from Philadelphia to Illinois

Information on your arrival and departure airports

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