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$69+ 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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Philadelphia to Illinois

Keep the following information in mind while searching for Philadelphia to Illinois flight deals. Data was last updated September 11, 2025.

Round-trip from

$121
(Cheapflightsfares)

One-way from

$69
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$141

Good round-trip deal

$168 or less

Good one-way deal

$133 or less
From Philadelphia to Illinois
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One-way flight from Philadelphia to Illinois
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Highest demand for flights based on searches. 19% potential increase in price ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Philadelphia to Illinois.
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Price to beat on a one-way flight from Philadelphia to Illinois.
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Find 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 September 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2510:21 amPHL - ORD
Nonstop2h 37mFrontier
Thu 10/26:10 amORD - PHL
Nonstop2h 15mFrontier
Deal found 9/10$121
This Frontier deal was found by Cheapflights users on 9/10. 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.
Thu 9/2510:21 amPHL - ORD
Nonstop2h 37mFrontier
Thu 9/258:49 pmORD - PHL
1 stop9h 46mFrontier
Deal found 9/10$122
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:45 amPHL - MDW
1 stop10h 08mFrontier
Fri 10/38:15 amMDW - PHL
Nonstop2h 01mFrontier
Deal found 9/10$122
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/16:26 pmPHL - ORD
1 stop6h 03mFrontier
Sun 11/25:01 amORD - PHL
Nonstop2h 12mFrontier
Deal found 9/9$123
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/96:10 amPHL - MDW
Nonstop2h 15mFrontier
Sun 10/128:25 amMDW - PHL
Nonstop2h 02mFrontier
Deal found 9/9$123
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/57:39 pmPHL - ORD
1 stop18h 33mFrontier
Sat 10/112:45 pmORD - PHL
Nonstop2h 15mFrontier
Deal found 9/10$124
This Frontier deal was found by Cheapflights users on 9/10. 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 10/56:15 amPHL - ORD
1 stop11h 36mFrontier
Mon 10/66:00 amORD - PHL
Nonstop2h 15mFrontier
Deal found 9/10$125
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/301:19 pmPHL - MDW
Nonstop2h 14mFrontier
Mon 11/39:32 amMDW - PHL
1 stop14h 52mFrontier
Deal found 9/10$125
This Priceline deal was found by Cheapflights users on 9/10. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/2610:21 amPHL - ORD
Nonstop2h 37mFrontier
Fri 10/36:10 amORD - PHL
Nonstop2h 15mFrontier
Deal found 9/10$126
This Frontier deal was found by Cheapflights users on 9/8. 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.
Thu 10/301:19 pmPHL - MDW
Nonstop2h 14mFrontier
Sat 11/11:37 pmMDW - PHL
1 stop9h 36mFrontier
Deal found 9/8$126
This Frontier deal was found by Cheapflights users on 9/10. 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 11/711:18 amPHL - ORD
1 stop6h 52mFrontier
Fri 11/79:47 pmORD - PHL
Nonstop2h 12mFrontier
Deal found 9/10$127
This Southwest deal was found by Cheapflights users on 9/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/294:05 pmPHL - MDW
1 stop4h 35mSouthwest
Sat 11/19:55 amMDW - PHL
Nonstop1h 55mSouthwest
Deal found 9/10$127

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 September 11, 2025.
Use the filters below to find and compare flights from Philadelphia to Illinois that are best for you.

Fly from

Philadelphia

Fly to

Illinois

Route

Depart

Return

Price

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 10/14

6:42 pm-8:10 pm

Nonstop2h 28m

Chicago O'Hare Intl

Wed 10/22

8:45 am-11:56 am

Nonstop2h 11m

$125

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Sat 12/6

2:20 pm-3:30 pm

Nonstop2h 10m

Chicago Midway

Sat 12/13

9:45 am-12:40 pm

Nonstop1h 55m

$129

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 10/29

10:15 am-11:25 am

Nonstop2h 10m

Chicago Midway

Wed 11/5

8:25 am-5:35 pm

2 stops8h 10m

$132

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Sat 11/1

6:00 am-7:25 am

Nonstop2h 25m

Chicago O'Hare Intl

Sun 11/2

9:15 pm-12:15 am

Nonstop2h 00m

$133

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 10/1

6:30 am-7:52 am

Nonstop2h 22m

Chicago O'Hare Intl

Mon 10/6

2:15 pm-5:35 pm

Nonstop2h 20m

$133

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 10/22

10:15 am-11:25 am

Nonstop2h 10m

Chicago Midway

Mon 10/27

6:30 am-9:25 am

Nonstop1h 55m

$133

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 10/2

12:50 pm-2:12 pm

Nonstop2h 22m

Chicago O'Hare Intl

Sat 10/4

7:30 am-10:39 am

Nonstop2h 09m

$133

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 10/22

5:25 am-6:30 am

Nonstop2h 05m

Chicago Midway

Sun 10/26

7:25 am-10:20 am

Nonstop1h 55m

$133

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Sun 11/16

6:00 am-7:26 am

Nonstop2h 26m

Chicago O'Hare Intl

Tue 11/18

11:05 am-2:07 pm

Nonstop2h 02m

$133

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 10/9

6:30 am-7:52 am

Nonstop2h 22m

Chicago O'Hare Intl

Sat 10/18

6:17 pm-9:28 pm

Nonstop2h 11m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 results
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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

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

Currently, August is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $245). Flying from Philadelphia to Illinois in March is currently the most expensive (average of $321). 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 September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Philadelphia to Illinois as you normally would.

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 September 11, 2025.

The most flights from PHL to USIL are scheduled on a Friday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (30 on average).

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 September 11, 2025.
See what other customers who have flown with Southwest, Delta, and United 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
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Delta
8.0
Very good
7,960 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Crew

8.6

Overall

8.0

Entertainment

7.5

Comfort

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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?

    United Airlines, Southwest, and Frontier can get you from Philadelphia to Illinois in just under 2h 10m. Your travel time can differ by up to 20h 27m. 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 United Airlines. According to our data, you can fly for as low as $80. Users have also found prices from $80 and $81 on Frontier and Spirit 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: SWISS (92%), ANA (86%), Air Canada (74%).

  • What are the cheapest flights from Philadelphia to Illinois?

    The cheapest flight price from Philadelphia to Illinois is $81. On average you can expect to pay $997. The most popular route, (Philadelphia - Chicago O'Hare Intl), can usually be booked for $113.

  • 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, August is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $245). Flying from Philadelphia to Illinois in March is currently the most expensive (average of $321). 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.

See more FAQs

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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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Top 6 airlines flying from Philadelphia to Illinois

Discover the top 6 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$60Average$165FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$185FlexibilityNo cancel feeOn-time65%
DeltaCheapest$118Average$297FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$144Average$396FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$164Average$298FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$165Average$416FlexibilityNo cancel feeOn-time71%

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