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$70+ Cheap flights from Philadelphia (PHL) to Illinois

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
May 28 — Jun 41
Thu 5/28
Thu 6/4
1 adult, Economy
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Cheap flight deals from Philadelphia to Illinois

Cheapest flights from Philadelphia to Illinois
Explore the most affordable flight options available from Philadelphia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.

This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:06 pm
PHL
-
ORD
Nonstop2h 38m
Frontier
Thu 5/141:59 pm
ORD
-
PHL
1 stop7h 11m
Frontier
Deal found 4/27$184
This Super.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/157:00 am
PHL
-
ORD
1 stop9h 43m
Frontier
Mon 5/187:52 pm
ORD
-
PHL
Nonstop2h 26m
Frontier
Deal found 4/27$185
This Frontier deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/244:35 pm
PHL
-
MDW
1 stop6h 27m
Frontier
Wed 5/276:00 am
MDW
-
PHL
1 stop5h 25m
Frontier
Deal found 4/28$185
This Expedia deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:29 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Mon 5/111:59 pm
ORD
-
PHL
1 stop7h 11m
Frontier
Deal found 4/27$186
This Trip.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:30 am
PHL
-
MDW
1 stop5h 39m
Frontier
Tue 6/26:00 am
MDW
-
PHL
1 stop5h 25m
Frontier
Deal found 4/28$187
This Frontier deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:29 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Tue 5/51:59 pm
ORD
-
PHL
1 stop7h 11m
Frontier
Deal found 4/23$188
This Trip.com deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/234:35 pm
PHL
-
MDW
1 stop6h 27m
Frontier
Wed 5/276:00 am
MDW
-
PHL
1 stop5h 25m
Frontier
Deal found 4/23$188
This Frontier deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1212:21 pm
PHL
-
ORD
1 stop11h 52m
Frontier
Sat 6/67:52 pm
ORD
-
PHL
Nonstop2h 26m
Frontier
Deal found 4/25$189
This Frontier deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/175:18 pm
PHL
-
ORD
Nonstop2h 42m
Frontier
Sat 7/258:05 pm
ORD
-
PHL
Nonstop2h 26m
Frontier
Deal found 4/27$190
This Frontier deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:29 pm
PHL
-
ORD
Nonstop2h 34m
Frontier
Thu 5/217:52 pm
ORD
-
PHL
Nonstop2h 26m
Frontier
Deal found 4/26$191
This Kiwi.com deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:00 am
PHL
-
ORD
1 stop16h 38m
Frontier
Fri 5/227:52 pm
ORD
-
PHL
Nonstop2h 26m
Frontier
Deal found 4/26$192
This Trip.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:25 pm
PHL
-
MDW
1 stop6h 37m
Frontier
Tue 6/912:27 pm
MDW
-
PHL
1 stop9h 02m
Frontier
Deal found 4/27$192

Find flight deals from Philadelphia to Illinois

Keep the following information in mind while searching for Philadelphia to Illinois flight deals. Data was last updated April 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$184
(Super.com)

One-way from

$70
(Frontier)

Popular in

March

Cheapest in

January

Average price

$307

Good round-trip deal

$304 or less

Good one-way deal

$160 or less
Provider with most accurate pricing for Philadelphia-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Chicago (CHI) flights.
Search Deals
From Philadelphia to Illinois
Search Deals
One-way flight from Philadelphia to Illinois
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Philadelphia to Illinois.
Search Deals
Price to beat on a one-way flight from Philadelphia to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 28, 2026.
Use the filters below to find and compare flights from Philadelphia to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PhiladelphiaChicago

PHL - RFD

PHLRFD

Philadelphia

Sat 6/13

6:00 am-10:37 am

1 stop29h 37m

Chicago Greater Rockford

Thu 6/18

11:27 am-12:44 am

1 stop12h 17m

$228

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Fri 5/29

4:06 pm-9:53 pm

1 stop6h 47m

Chicago O'Hare Intl

Mon 6/1

7:07 am-4:12 pm

1 stop8h 05m

$240

PhiladelphiaChicago

PHL - RFD

PHLRFD

Philadelphia

Tue 6/2

9:16 pm-9:17 am

1 stop13h 01m

Chicago Greater Rockford

Thu 6/4

11:27 am-12:44 am

1 stop12h 17m

$241

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 5/27

8:41 pm-10:14 pm

Nonstop2h 33m

Chicago O'Hare Intl

Wed 6/3

3:56 pm-7:18 pm

Nonstop2h 22m

$247
Quickest round-trip

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 6/3

5:45 pm-6:55 pm

Nonstop2h 10m

Chicago Midway

Sat 6/6

1:55 pm-4:55 pm

Nonstop2h 00m

$247

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Tue 8/11

3:00 pm-4:00 pm

Nonstop2h 00m

Chicago Midway

Tue 8/18

1:55 pm-9:50 pm

1 stop6h 55m

$257

PhiladelphiaChicago

PHL - RFD

PHLRFD

Philadelphia

Wed 6/3

2:57 pm-10:37 am

2 stops20h 40m

Chicago Greater Rockford

Sun 6/7

11:27 am-12:44 am

1 stop12h 17m

$259

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Sat 6/6

5:17 am-10:20 am

1 stop6h 03m

Moline Quad-City

Wed 6/10

5:17 pm-12:59 am

1 stop6h 42m

$261

PhiladelphiaChicago

PHL - RFD

PHLRFD

Philadelphia

Wed 7/15

6:33 pm-10:37 am

2 stops17h 04m

Chicago Greater Rockford

Sun 7/19

11:27 am-11:43 am

1 stop23h 16m

$262

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Sat 6/27

11:16 am-4:58 pm

1 stop6h 42m

Chicago O'Hare Intl

Wed 7/1

1:46 pm-9:19 pm

1 stop6h 33m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from Philadelphia to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Philadelphia to Illinois?

Booking 48 days in advance of your planned departure date is, on average, the best time to get cheap flights from Philadelphia to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Philadelphia to Illinois?

Currently, February is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $40). Flying from Philadelphia to Illinois in December is currently the most expensive (average of $827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PHL to IL?

Find hourly flight availability from Philadelphia to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 28, 2026.

It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 30% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Philadelphia to Illinois?

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Illinois. Price data was last updated on April 25, 2026.

Travelers seeking maximum savings on their Philadelphia to Illinois flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Philadelphia to Illinois

Explore weekly flight availability from Philadelphia to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 28, 2026.

The most flights from PHL to USIL are scheduled on a Tuesday (44 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (7 on average).

How much does it cost to fly round-trip from Philadelphia to Illinois?

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 28, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Philadelphia to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,314 reviews
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,467 reviews
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,672 reviews
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,677 reviews
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.7
Fair
2,970 reviews
Southwest
8.0
Very good
4,314 reviews

Comfort

8.0

Food

7.0

Entertainment

7.5

Crew

8.6

Boarding

8.1

Overall

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Philadelphia to Illinois?

    Philadelphia (PHL), located 7.0 mi from the city center, is the airport you fly out of when you book flights from Philadelphia to Illinois.

  • How long is the flight from Philadelphia to Illinois?

    Delta, United Airlines, and Southwest can get you from Philadelphia to Illinois in just under 2h 10m. Your travel time can differ by up to 4h 37m. The distance from Philadelphia to Illinois is about 666 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Philadelphia to Illinois one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $49. Users have also found prices from $69 and $79 on Southwest and United Airlines, respectively.

  • What are the most popular routes from Philadelphia to Illinois?

    While some choose either Philadelphia - Chicago Midway or Philadelphia - Lambert-St Louis, Philadelphia - Chicago O'Hare Intl is the most popular route from Philadelphia to Illinois.

  • What are the most reliable airlines from Philadelphia to Illinois?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Philadelphia to Illinois on time: Air Canada (80%), SWISS (80%), ANA (79%).

  • What are the cheapest flights from Philadelphia to Illinois?

    The cheapest flight price from Philadelphia to Illinois is $84. On average you can expect to pay $573. The most popular route, (Philadelphia - Chicago O'Hare Intl), can usually be booked for $97.

  • Can I find deals for flights from Philadelphia to Illinois that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Illinois.

  • Can I find deals for business class flights from Philadelphia to Illinois?

    Yes. Cheapflights offers flight deals from Philadelphia to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Illinois?

    Currently, February is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $40). Flying from Philadelphia to Illinois in December is currently the most expensive (average of $827). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Philadelphia to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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John F Kennedy Intl to San Francisco flights
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John F Kennedy Intl to Denver flights
Newark to West Palm Beach flights
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Newark to New Orleans flights
Reagan-National to Miami flights
Reagan-National to Las Vegas flights
Dulles Intl to O'Hare Intl flights

Top 5 airlines flying from Philadelphia to Illinois

Discover the top 5 airlines that operate flights from Philadelphia to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$174FlexibilityNo cancel feeOn-time62%
DeltaCheapest$83Average$206FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$156Average$371FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$158Average$326FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$163Average$399FlexibilityNo cancel feeOn-time71%

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