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$55+ 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 3/18. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Jan 18 — Jan 251
Sat 1/18
Sat 1/25
1 adult, Economy
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Cheap flight deals from Philadelphia to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 13, 2025.

Round-trip from

$108
(Trip.com)

One-way from

$55
(Frontier)
From Philadelphia to Illinois
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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 January 13, 2025.

This Trip.com deal was found by Cheapflights users on 1/11. 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.
Thu 1/306:05 amPHL - ORD
1 stop8h 45mFrontier
Mon 2/33:16 pmORD - PHL
1 stop7h 42mFrontier
Deal found 1/11$108
This Frontier deal was found by Cheapflights users on 1/12. 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 2/106:05 amPHL - MDW
1 stop9h 57mFrontier
Wed 2/128:12 amMDW - PHL
1 stop6h 59mFrontier
Deal found 1/12$109
This Booking.com deal was found by Cheapflights users on 1/13. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/279:29 amPHL - STL
1 stop15h 02mFrontier
Mon 2/35:05 pmSTL - PHL
1 stop17h 47mFrontier
Deal found 1/13$120
This eDestinos deal was found by Cheapflights users on 1/12. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/118:47 pmPHL - ORD
1 stop20h 44mMultiple Airlines
Tue 2/185:36 pmORD - PHL
1 stop24h 28mMultiple Airlines
Deal found 1/12$130
This eDestinos deal was found by Cheapflights users on 1/12. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/115:07 pmPHL - MDW
2 stops15h 00mMultiple Airlines
Tue 2/188:47 amMDW - PHL
2 stops21h 06mMultiple Airlines
Deal found 1/12$136
This Cheapflightsfares deal was found by Cheapflights users on 1/12. 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.
Tue 2/46:00 amPHL - ORD
1 stop7h 29mSpirit Airlines
Wed 2/55:11 amORD - PHL
1 stop12h 54mSpirit Airlines
Deal found 1/12$141
This JetBlue Airways deal was found by Cheapflights users on 1/13. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/1111:10 amPHL - ORD
1 stop7h 45mJetBlue
Tue 2/1812:45 pmORD - PHL
1 stop8h 42mJetBlue
Deal found 1/13$181
This Delta deal was found by Cheapflights users on 1/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/165:02 pmPHL - ORD
1 stop8h 04mDelta
Wed 4/233:35 pmORD - PHL
1 stop7h 49mDelta
Deal found 1/13$197
This Delta deal was found by Cheapflights users on 1/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1612:45 pmPHL - MDW
1 stop5h 18mDelta
Wed 4/234:59 pmMDW - PHL
1 stop6h 25mDelta
Deal found 1/13$197
This United Airlines deal was found by Cheapflights users on 1/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/285:10 pmPHL - MLI
1 stop4h 59mUnited Airlines
Sat 2/16:30 amMLI - PHL
1 stop6h 54mUnited Airlines
Deal found 1/12$199
This Southwest deal was found by Cheapflights users on 1/11. 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 4/168:05 amPHL - MDW
1 stop6h 35mSouthwest
Tue 4/228:15 amMDW - PHL
Nonstop2h 00mSouthwest
Deal found 1/11$227
This American Airlines deal was found by Cheapflights users on 1/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/154:00 pmPHL - ORD
Nonstop2h 30mAmerican Airlines
Sat 2/228:36 pmORD - PHL
Nonstop2h 05mAmerican Airlines
Deal found 1/12$253

Find flights from Philadelphia to Illinois within your budget

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 January 13, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 1/30

6:05 am-1:50 pm

1 stop8h 45m

Chicago O'Hare Intl

Mon 2/3

3:16 pm-11:58 pm

1 stop7h 42m

$108

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Mon 2/10

6:05 am-3:02 pm

1 stop9h 57m

Chicago Midway

Wed 2/12

8:12 am-4:11 pm

1 stop6h 59m

$109

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

Mon 1/27

9:29 am-11:31 pm

1 stop15h 02m

Lambert-St Louis

Mon 2/3

5:05 pm-11:52 am

1 stop17h 47m

$120

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 2/11

8:47 pm-4:31 pm

1 stop20h 44m

Chicago O'Hare Intl

Tue 2/18

5:36 pm-7:04 pm

1 stop24h 28m

$130

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Tue 2/11

5:07 pm-7:07 am

2 stops15h 00m

Chicago Midway

Tue 2/18

8:47 am-6:53 am

2 stops21h 06m

$136

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 2/4

6:00 am-12:29 pm

1 stop7h 29m

Chicago O'Hare Intl

Wed 2/5

5:11 am-7:05 pm

1 stop12h 54m

$141

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 2/11

11:10 am-5:55 pm

1 stop7h 45m

Chicago O'Hare Intl

Tue 2/18

12:45 pm-10:27 pm

1 stop8h 42m

$181

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 4/16

12:45 pm-5:03 pm

1 stop5h 18m

Chicago Midway

Wed 4/23

4:59 pm-12:24 am

1 stop6h 25m

$197

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Tue 1/28

5:10 pm-9:09 pm

1 stop4h 59m

Moline Quad-City

Sat 2/1

6:30 am-2:24 pm

1 stop6h 54m

$199

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Tue 2/4

6:20 pm-7:35 pm

Nonstop2h 15m

Chicago Midway

Tue 2/11

10:05 am-1:00 pm

Nonstop1h 55m

$219

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/12

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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.

Travel insights for flights from Philadelphia to Illinois

Get recent, data-driven insights about flights from Philadelphia to Illinois including ideal travel times, pricing trends, and more.