$35 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 4/15. 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.
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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, 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 Philadelphia to Illinois, as well as popular online travel agencies
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Best Illinois Flight Deals from Philadelphia

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

Chicago
Chicagononstop$38
Moline
Moline1 stop$249
Peoria
Peoria1 stop$506
Bloomington
Bloomington1 stop$389
Springfield
Springfield1 stop$429
St. Louis
St. Louis1 stop$110

Good to know

Low season

January

High season

July

Cheapest flight

$35
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Philadelphia to Chicago Midway Airport

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.

FAQs - booking Illinois flights

  • How long is the flight to Illinois from Philadelphia?

    Flights to Chicago2h 17m
  • What is the cheapest flight to Illinois from Philadelphia?

    The cheapest ticket to Illinois from Philadelphia found in the last 72 hours was $35 one-way, and $38 round-trip. The most popular route is from Philadelphia to Chicago O'Hare Intl, and the cheapest round-trip airline ticket found on this route in the last 72 hours was $39.

  • Which airlines fly to Illinois?

    American Airlines flies most frequently to Chicago O'Hare Intl from Philadelphia. In general, United Airlines, Air New Zealand and Alaska Airlines fly the most to Illinois.

  • 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 from Philadelphia to Illinois 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 from Philadelphia to Illinois with an airline and back 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 from Philadelphia to Illinois 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 $198 one-way - $369 round-trip
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be March, April and May. The cheapest month to fly from Philadelphia is January.
  • Morning departure is around 11% cheaper than an evening flight, on average*.
See more tips
*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

 
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.
8.1
SouthwestOverall score based on 4411 reviews
7.1Food
8.1Comfort
8.7Crew
7.6Entertainment
8.2Boarding
Airline reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

10.0 ExcellentAnonymous, Jan 2025ATL - LGA
Read more Southwest reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Flight was awfully bumpy and landing was a bit jolting. I was in the restroom when snacks and drinks were served and was not asked if i wanted any. I had to ask for water finally.

Wi Fi was horrible kept cutting out the whole time and too expensive

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

Boarding was a little late, but made up for it. It was quick to taxi to the runway, since it's a smallish airport.

Excellent! Only question is how we check in at exactly 24 hours in advance and end up at the end of the B boarding group

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

It was 2 hours 45 minutes late, for no apparently clear reason.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

This was the second flight this week with flight attendant Marcus I’m not sure if his last name is Lane or Lang but this guy is awesome. He funny, attentive and his service is 5 stars. Marcus makes business travel more enjoyable !

Although the flight left late, we arrived early. It was one of the quickest boarding and off boarding experiences I’ve had. It was kind of annoying the only drinks they had were water, coffee, and tea. The flight was very smooth, temperature was just right, and flight attendants were friendly.

Lower number on this flight so spaced out passengers. Able to enjoy more room to relax during flight. It was lovely.

Kind staff. Snacks are small but that’s the new normal.

The young man who was our flight attendant in first class was lazy and did not do his job well at all. Never offered drinks upon boarding - actually I take that back... said "are you okay with water" as if I do not want to get you anything else, only passed the snacks around once, got my drink order wrong and then never offered a second round of drinks. He was the worst I have ever seen on Delta and we fly a lot.

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

Flight left early and arrived early. the whole trip was excellent.

Seats were really tight and the seat belts did not give enough slack.

There's just no way to sit fully upright and comfortably in these seats. There needs to be 2 more inches of room, and that's not something that only one person on the flight needs - the whole flight needs 2 more inches of room. If that means you sell 6 less seats, so be it. It's too close for anyone. Forcing people to pay for "premium" economy just to get "barely enough space to breathe" isn't really an answer to that.

The crew were very nice. The Chocolate is good and v there’s no entertainment. Thanks

The crew were very nice. I would have appreciated a pillow for comfort. I had a special meal that was sloppy, but the salad was great. Thanks

The plane was in Moline all night. Consequently, we assumed an on time departure at 8:15am. Unfortunately, and as is the normal case with United in Moline, we departed 2.5 hours late. When the crew came, it was discovered that there was very little heat in the plane. Seems this should have been checked hours before the crew arrived. Then when we boarded and the plane was to be de-iced, the United de-icing truck was not working! We awaited the American Airlines truck. All of this caused us to miss our connection in Chicago. My suggestion is never take United Airlines flight from Moline. We have been disappointed 80% of the time and have vowed to not take United again from Moline.

Flight was delayed two hours. No snacks and no tv screens. My bag got stuck in Chicago

The aircrew was solid, the flight was chill, I had no issues. The gate agent was not the best. I was trying to use a military bag upgrade to move my bag from under the seat to the overhead bins and he told me there’s no overhead bins on the plane, argued with me why booking put a military member in basic economy (I don’t really understand this) and made it an issue to even try to help me stating I’d have to call reservations to get a bag upgrade. When every other agent with United can add it at the gate, this man couldn’t be bothered.

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

Almost everything was outstanding. First, we boarded on time and the flight crew did a great job getting everyone seated. Then the pilots took their time and care to make sure the plane was full de-iced three times as there was a bad ice storm a few hours earlier. The plane ride was smooth and comfortable and even the economy seats had decent room and comfort. Flight Attendant Lisa went above and beyond to make sure I was comfortable - she is outstanding. The only thing wrong with the flight, and it is something which needs to be addressed, is that the gate to gate time was over 6.5 hours and not one meal was served. The only thing offered to eat were two small cookies for a transcontinental flight - unacceptable. Charge me more but give me a meal for a long flight. Thankfully Lisa found something for me.

Very poor. Our special services attendant gave us incorrect information. I also was mishandled at landing. There was no wheelchair waiting. I fell deboarding the plane. Appalling!

I had a very unpleasant encounter with one man from customer service: he was extremely rude and miserable. And his condition was reflected on his decision to send me to the worst airport hotel and get an awful flight connection. My hotel shuttle had never arrived and I had to book another hotel. People served by other representatives got a much better treatment and deal.

The flight left a bit late, but arrived close to time expected…With the flight being close to full the crew did well serving drinks to all in a very timely fashion. The flight was a pleasure…

They didn't have any gluten-free snacks, oddly, which I require...or any flavored soda water or decaf tea options, which seems to be standard.

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?

The check in process was a mess for no reason. I spent an hour waiting in line trying to get them to print my boarding pass and as a result I missed my flight.

The airline used deceptive tactics to charge us more for our trip. Search Frontier Class Action Lawsuit to find out more or read the hundreds of reviews that have nearly identical stories.. don't fly this airline.. you've been warned.

Check in at Philadelphia international was absolutely terrible! I fly 2 to 3 times a month and avoid frontier at all cost and will never fly Frontier again! The night before travel, I tried checking in however, the app was giving me an error, so I went to the desktop, which instructed you that you need to use the app. The next day I presented at the check-in gate after trying at least a half dozen times prior to getting into the airport and continuing to getting the error in the app. I actually had rebooted my phone numerous times and reinstall the app just in case. My phone is only one generation older than the current model. It has no problems completing a frontier flight purchase or any other app issues. There was only three frontier employees working at check-in and a huge line while I was in line I continued to try and check in via the app. As I approach the desk, I was dreading dealing with the agent. He was extremely unprofessional, anti-semantic & very ignorant, and mean to the people in front of me, as well as the people who ended up being behind me. He literally told people “Man I don’t care bout y’all” in his native dialect! Maintaining my composure I approached and explained the situation. To which he replied, you’re gonna have to pay then! I don’t understand. It’s an issue with their app not allowing me to check in! Not my issue! He told me if I pay cash it would be $15, $25 if I pay credit card. I don’t understand a $10 difference for paying with a credit card? I am completely cashless so I continued to try using the app to avoid the $25 fee, Which I still don’t believe that I should be responsible for since it was Frontier’s technical issue!!! I continued to check in via the app a couple more times after he verified I was doing everything right he proceeded to continue to belittle the people behind me. Yelling at them saying I don’t care about you people! I cannot believe that this is the way that businesses would treat its customers! Unfortunately, the black mail with dreadlocks did not have a name tag all he had was a frontier sweater on! For the $25 fee that I ended up getting charged on my credit card. I should’ve just booked originally with Spirit or any other carrier! I have no problem paying fees that I should be responsible for, but when it’s due to a technical failure of a company, the customer should not be responsible for it! I cannot believe that it’s not frontier going out of business!

they delayed my flight which ended up, causing my layover flight to leave without me, resulting in me missing a flight and having to stay overnight in Houston international. I got no compensation other than a flight to my original location only a day later. i’ve never experienced such a unprofessional situation

Very easy with the app to board and staff skills

After waiting several minutes to be acknowledged by 3 employees on their phones, was told we had missed our flight because the doors were closed at that literal moment. Had they given any actual service or help while we were standing there we would have been on with time to spare. More than 10 people were turned away in this fashion claiming there was no way they could let us on the plane, even though it was still sitting connected to the terminal. After the desk agents let us know they didn't care about the situation we were forced to pay more than twice the price of our original tickets as no credits were given for the price of the "missed" flight. And the icing on the cake was after being treated poorly, fleeced for another few hundred dollars for new tickets? We waited on the next plane for 25 minutes passed the "doors closed" time, letting almost an extra dozen passengers on board. You're company has lazy, disinterested employees and your lack of any real help will ensure this was the first and last time we fly Frontier. Awful.

My experience with the phoenix airport was terrible, the personnel lay the ticket counter charged me for a carry on that fit in the carry on size box, and the two women I spoke with were terribly rude and not willing to help.,,, there was one lady “candy” on the flight crew that was amazing and is the only reason I stayed on the flight at all, because the other stewards helping people to get seated on the plane were terrible

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

The plane was clean, the crew was friendly and helpful. It’s a low cost airline so there was no food, drinks or in flight entertainment but we didn’t expect any of these things. In the room for improvement department, they should install USB ports in seats to charge mobile devices.

The seats were extremely hard and uncomfortable, even for a budget airline.

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.
5/5Mon
nonstopFrontier
2h 16mPHL-MDW
5/9Fri
nonstopFrontier
2h 02mMDW-PHL
$85
4/3Thu
nonstopFrontier
2h 17mPHL-MDW
4/8Tue
nonstopFrontier
2h 00mMDW-PHL
$87
4/8Tue
nonstopUnited Airlines
2h 24mPHL-ORD
4/15Tue
nonstopUnited Airlines
2h 10mORD-PHL
$177
4/8Tue
1 stopDelta
6h 34mPHL-MDW
4/15Tue
1 stopDelta
4h 32mMDW-PHL
$197
4/2Wed
nonstopSouthwest
2h 15mPHL-MDW
4/3Thu
nonstopSouthwest
1h 55mMDW-PHL
$207
4/8Tue
nonstopSouthwest
2h 10mPHL-MDW
4/12Sat
nonstopSouthwest
1h 55mMDW-PHL
$220
4/17Thu
1 stopDelta
3h 40mPHL-MDW
4/23Wed
1 stopDelta
6h 40mMDW-PHL
$227
4/8Tue
1 stopUnited Airlines
4h 31mPHL-ORD
4/15Tue
nonstopUnited Airlines
2h 08mORD-PHL
$232
4/3Thu
nonstopAmerican Airlines
2h 32mPHL-ORD
4/6Sun
nonstopAmerican Airlines
2h 03mORD-PHL
$237
4/16Wed
nonstopAmerican Airlines
2h 24mPHL-ORD
4/19Sat
nonstopAmerican Airlines
2h 03mORD-PHL
$242

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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.
4/15Tue
nonstopFrontier
2h 20mPHL-MDW
$35
3/19Wed
1 stopSpirit Airlines
13h 56mPHL-ORD
$39
4/2Wed
nonstopUnited Airlines
2h 24mPHL-ORD
$89
4/2Wed
nonstopSouthwest
2h 15mPHL-MDW
$89
4/1Tue
1 stopDelta
3h 45mPHL-MDW
$99
4/3Thu
nonstopAmerican Airlines
2h 32mPHL-ORD
$119
5/6Tue
nonstopSouthwest
2h 10mPHL-MDW
$119
4/17Thu
1 stopDelta
4h 24mPHL-ORD
$129
4/5Sat
nonstopAmerican Airlines
2h 24mPHL-ORD
$132
4/4Fri
nonstopUnited Airlines
2h 24mPHL-ORD
$154

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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.
2/25Tue
multi-stopSpirit Airlines
14h 41mPHL-ORD
2/27Thu
multi-stopSpirit Airlines
13h 52mORD-PHL
$233
2/25Tue
multi-stopSpirit Airlines
16h 38mPHL-ORD
2/27Thu
multi-stopSpirit Airlines
13h 52mORD-PHL
$234
2/25Tue
multi-stopFrontier
10h 51mPHL-STL
2/26Wed
multi-stopFrontier
10h 31mSTL-PHL
$280
2/22Sat
multi-stopFrontier
16h 08mPHL-STL
3/2Sun
multi-stopFrontier
20h 58mSTL-PHL
$292
2/21Fri
multi-stopUnited Airlines
26h 25mPHL-ORD
2/22Sat
nonstopUnited Airlines
2h 00mORD-PHL
$369
2/22Sat
multi-stopUnited Airlines
23h 46mPHL-ORD
2/23Sun
nonstopUnited Airlines
2h 00mORD-PHL
$458
2/23Sun
nonstopSouthwest
2h 15mPHL-MDW
3/9Sun
nonstopSouthwest
1h 55mMDW-PHL
$627
2/24Mon
nonstopSouthwest
2h 15mPHL-MDW
2/26Wed
nonstopSouthwest
1h 50mMDW-PHL
$636
2/25Tue
multi-stopAmerican Airlines
4h 48mPHL-STL
3/3Mon
nonstopAmerican Airlines
2h 13mSTL-PHL
$785
2/23Sun
nonstopAmerican Airlines
2h 29mPHL-ORD
2/25Tue
multi-stopAmerican Airlines
4h 32mORD-PHL
$808

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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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