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Find cheap flights from Philadelphia to Illinois from $39

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 5/29. 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
Thu 5/16
Thu 5/23

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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$48
Moline
Moline1 stop$435
Peoria
Peoria1 stop$486
Bloomington
Bloomington1 stop$239
Champaign
Champaign1 stop$366
Springfield
Springfield1 stop$382
St. Louis
St. Louisnonstop$78

Good to know

Low season

January

High season

August

Cheapest flight

$39
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly and prices are also 9% 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 $164 one-way - $238 round-trip
  • Morning departure is around 7% 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 11123 reviews
8.2boarding
7.5food
8.6crew
7.9comfort
8.0entertainment
Airline reviews

It was a crowded flight. They did the best they could.

6.0 GoodNetty, Apr 2024SYR - JFK
Read more about Delta reviews

It was a crowded flight. They did the best they could.

Service was good for such a short flight. Small plane but smooth flight.

Worst flight in my life. Only was scheduled for a 45 min flight to get our connection flight. It was late by 40 minutes and we missed our connection. Delta was totally useless trying to help and unable to get my family on the next flight because they overbooked it Thus had to get a hotel at my expense and lost a day at Disney as a result. Cost me about a $1000 if you add 2 hotels meals shuttles etc to get thru the day Awful customer service by Delta in Detroit totally useless people

The experience was good and the flight departed on time and landed early

The flight was delayed but we got to our final destination.

Boarding was great. The flight landed early. It took the crew over an hour and a half to bring out drinks. I paid to upgrade my seat to Comfort+ only to be near a crying/screaming baby who was seldom quiet. Noise-cancelling earbuds didn’t even help. Waste of money to upgrade.

Seats in first class on the E175 recline too far back. I was in 2A, and the man in 1A fully reclined almost the entire flight. It took 6-7 inches of space away from me and made it very difficult to work on my laptop.

On 2 different flights the wifi was horrible and there was no drink or snack service.

Wifi wasn’t working well so we couldn't view any media.

Flight was late. Club was full. Experience is exactly what I expected.

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.

The flight was delayed by 4 hours !!!!! It was very uncomfortable , and they told us only one our before departure

The flights from Ottawa to Albuquerque went smoothly enough though on on flight they didn't have how water for coffee or tea and on another there there was no ice. The return flights from Albuquerque were delayed by mechanical problems on both flights. Ottawa was a ground crew maintenance issue.

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

We liked quick boarding and on time departure. Seats were very uncomfortable.

Great flight. Quick boarding and departure. No problems. Flight crew were very friendly and professional.

heat was on full blast. It was like the Tropics inside the plan.

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.

They kept Changing the flight times. It was delayed several times and at one point it was supposed to depart at 3.40am! At which point we ended up staying overnight and booked long a separate United flight for early morning departure. The spirit flight then got moved up and left at 1.30 in the morning when it was supposed to leave at 9.40pm the night before.

Not have to pay for every single item to take a flight. Seating and delays sucked.

Flight was cancelled and I had to spend the night in the airport lugging my suitcase around

If you don’t check in 24 hours in advance, they will charge you $110 to check your bag instead of the $30. I did not get an email with this information and did not check in. In addition, my flight home was cancelled at layover and I had to spend the night in the airport, and then have another layover at another airport before making it home. Will not fly frontier again.

Terrible. Seats are bad and the baggage policy is inconsistent

Flight delayed 3 times, resulting in late arrival, rental car place gave car away resulting in increased BS charges because I was late. Frontier blows.

I paid for extra leg room. The flimsy plastic seat underneath the floatation seat did not line up with the arm rests. It seemed as if the plastic part was zip tied on but immovable. This caused severe uncomfortable for the duration of the flight.

Left Denver late, then sat on tarmac 30 min after arrival

Better than I expected but I did pay for a seat and carry on bags ahead of time.

Crew members are very rude and not cooperate with passengers.

30 minute delay due to boarding and settling of a family.

Book cheap flights from Philadelphia to Illinois

Recent round-trip flight deals

5/21Tue
nonstopFrontier
2h 22mPHL-ORD
5/22Wed
nonstopFrontier
2h 03mORD-PHL
$48
5/15Wed
nonstopFrontier
2h 17mPHL-MDW
5/22Wed
nonstopFrontier
2h 03mMDW-PHL
$48
5/15Wed
1 stopSpirit Airlines
11h 06mPHL-ORD
5/21Tue
1 stopSpirit Airlines
9h 39mORD-PHL
$76
5/1Wed
1 stopSpirit Airlines
11h 36mPHL-ORD
5/3Fri
1 stopSpirit Airlines
9h 03mORD-PHL
$85
7/1Mon
1 stopAmerican Airlines
3h 50mPHL-ORD
7/3Wed
nonstopAmerican Airlines
1h 58mORD-PHL
$134
5/15Wed
nonstopAmerican Airlines
2h 23mPHL-ORD
5/22Wed
nonstopAmerican Airlines
1h 58mORD-PHL
$135
5/23Thu
1 stopDelta
5h 21mPHL-MDW
5/25Sat
1 stopDelta
4h 17mMDW-PHL
$156
5/26Sun
1 stopDelta
6h 25mPHL-ORD
6/1Sat
1 stopDelta
4h 41mORD-PHL
$161
5/16Thu
nonstopUnited Airlines
2h 25mPHL-ORD
5/20Mon
nonstopUnited Airlines
2h 03mORD-PHL
$177
5/9Thu
nonstopUnited Airlines
2h 25mPHL-ORD
5/13Mon
nonstopUnited Airlines
2h 03mORD-PHL
$219

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Recent one-way flight deals

5/29Wed
nonstopFrontier
2h 22mPHL-ORD
$39
5/9Thu
nonstopFrontier
2h 17mPHL-MDW
$39
5/1Wed
1 stopSpirit Airlines
11h 36mPHL-ORD
$45
5/22Wed
1 stopSpirit Airlines
8h 12mPHL-ORD
$53
6/19Wed
nonstopUnited Airlines
2h 24mPHL-ORD
$66
5/2Thu
nonstopAmerican Airlines
2h 25mPHL-ORD
$70
5/13Mon
nonstopUnited Airlines
2h 25mPHL-ORD
$74
5/27Mon
1 stopDelta
4h 20mPHL-ORD
$83
6/6Thu
1 stopDelta
4h 06mPHL-MDW
$83
7/10Wed
1 stopAmerican Airlines
6h 20mPHL-STL
$93

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Last minute flights from Philadelphia to Illinois

Last minute flight, train and bus deals

4/18Thu
nonstopFrontier
2h 17mPHL-MDW
4/23Tue
nonstopFrontier
1h 56mMDW-PHL
$73
4/20Sat
nonstopFrontier
2h 17mPHL-MDW
4/27Sat
nonstopFrontier
2h 01mMDW-PHL
$81
4/21Sun
multi-stopSpirit Airlines
23h 48mPHL-ORD
4/22Mon
multi-stopSpirit Airlines
16h 24mORD-PHL
$179
4/19Fri
nonstopAmerican Airlines
2h 29mPHL-ORD
4/23Tue
nonstopAmerican Airlines
1h 53mORD-PHL
$210
4/19Fri
multi-stopAmerican Airlines
4h 48mPHL-ORD
4/22Mon
nonstopAmerican Airlines
1h 56mORD-PHL
$218
4/17Wed
multi-stopSpirit Airlines
11h 36mPHL-ORD
4/22Mon
multi-stopSpirit Airlines
14h 10mORD-PHL
$221
4/20Sat
multi-stopDelta
4h 37mPHL-MDW
4/24Wed
multi-stopDelta
6h 33mMDW-PHL
$239
4/18Thu
nonstopUnited Airlines
2h 25mPHL-ORD
4/23Tue
multi-stopUnited Airlines
6h 15mORD-PHL
$289
4/21Sun
nonstopUnited Airlines
2h 25mPHL-ORD
4/22Mon
nonstopUnited Airlines
2h 03mORD-PHL
$294
4/21Sun
multi-stopDelta
6h 29mPHL-STL
4/22Mon
multi-stopDelta
6h 25mSTL-PHL
$566

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Philadelphia - Illinois Flights

Departure:

Philadelphia (PHL)United States

Return flight deals:

Illinois - Philadelphia

Cabin classes:

$251
$552
$892
$58