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$52+ Cheap flights from Pennsylvania 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Jan 29 — Feb 51
Thu 1/29
Thu 2/5
1 adult, Economy
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Cheap flight deals from Pennsylvania to Illinois

Cheapest flights from Pennsylvania to Illinois
Explore the most affordable flight options available from Pennsylvania to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 30, 2025.

This Frontier deal was found by Cheapflights users on 12/28. 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.
Tue 12/3011:30 amEWR - MDW
Nonstop2h 31mFrontier
Tue 1/136:30 pmMDW - EWR
Nonstop2h 00mFrontier
Deal found 12/28$113
This Frontier deal was found by Cheapflights users on 12/28. 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.
Wed 12/3111:00 amJFK - ORD
Nonstop2h 57mFrontier
Wed 1/1412:00 pmORD - JFK
Nonstop2h 24mFrontier
Deal found 12/28$134
This CheapOair deal was found by Cheapflights users on 12/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:37 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Tue 1/135:53 pmORD - LGA
Nonstop2h 06mSpirit Airlines
Deal found 12/30$144
This Frontier deal was found by Cheapflights users on 12/28. 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.
Wed 12/3111:00 amJFK - ORD
Nonstop2h 57mFrontier
Mon 1/128:35 amORD - JFK
Nonstop2h 24mFrontier
Deal found 12/28$145
This Super.com deal was found by Cheapflights users on 12/30. 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.
Wed 12/318:37 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Wed 1/74:38 pmORD - LGA
Nonstop2h 04mSpirit Airlines
Deal found 12/30$145
This Kiwi.com deal was found by Cheapflights users on 12/29. 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.
Wed 12/318:37 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Wed 1/145:53 pmORD - LGA
Nonstop2h 06mSpirit Airlines
Deal found 12/29$151
This Cheapflightsfares deal was found by Cheapflights users on 12/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:37 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Thu 1/85:53 pmORD - LGA
Nonstop2h 06mSpirit Airlines
Deal found 12/28$155
This Frontier deal was found by Cheapflights users on 12/28. 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.
Wed 12/3111:00 amJFK - ORD
Nonstop2h 57mFrontier
Wed 1/78:35 amORD - JFK
Nonstop2h 24mFrontier
Deal found 12/28$156
This Super.com deal was found by Cheapflights users on 12/28. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:55 amEWR - ORD
Nonstop2h 36mSpirit Airlines
Thu 1/84:38 pmORD - EWR
Nonstop2h 08mSpirit Airlines
Deal found 12/28$159
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:37 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Mon 1/125:53 pmORD - LGA
Nonstop2h 06mSpirit Airlines
Deal found 12/28$162
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/318:37 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Sat 1/105:53 pmORD - LGA
Nonstop2h 06mSpirit Airlines
Deal found 12/28$165
This Kiwi.com deal was found by Cheapflights users on 12/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:55 amEWR - ORD
Nonstop2h 36mSpirit Airlines
Mon 1/124:38 pmORD - EWR
Nonstop2h 08mSpirit Airlines
Deal found 12/28$166

Find flight deals from Pennsylvania to Illinois

Keep the following information in mind while searching for Pennsylvania to Illinois flight deals. Data was last updated December 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$90
(Trip.com)

One-way from

$52
(Expedia)

Popular in

February

Cheapest in

September

Average price

$287

Good round-trip deal

$289 or less

Good one-way deal

$186 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 Pennsylvania to Illinois
Search Deals
One-way flight from Pennsylvania to Illinois
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Pennsylvania to Illinois.
Search Deals
Price to beat on a one-way flight from Pennsylvania to Illinois.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pennsylvania 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 December 30, 2025.
Use the filters below to find and compare flights from Pennsylvania to Illinois that are best for you.

Fly from

Pennsylvania

Fly to

Illinois

Route

Depart

Return

Price

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Fri 1/16

5:25 pm-7:36 pm

Nonstop3h 11m

Chicago O'Hare Intl

Sun 1/18

9:15 am-12:32 pm

Nonstop2h 17m

$97

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Fri 2/20

6:10 am-7:55 am

Nonstop2h 45m

Chicago O'Hare Intl

Mon 2/23

6:00 am-9:12 am

Nonstop2h 12m

$97

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Thu 1/15

6:30 pm-8:15 pm

Nonstop2h 45m

Chicago Midway

Sun 1/18

7:15 pm-10:20 pm

Nonstop2h 05m

$97

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Tue 1/27

9:21 pm-11:09 pm

Nonstop2h 48m

Chicago O'Hare Intl

Tue 2/3

1:00 pm-4:13 pm

Nonstop2h 13m

$97

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Thu 1/22

6:00 am-7:40 am

Nonstop2h 40m

Chicago Midway

Sun 1/25

6:05 pm-9:10 pm

Nonstop2h 05m

$97

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Fri 1/16

3:20 pm-5:08 pm

Nonstop2h 48m

Chicago O'Hare Intl

Sun 1/18

8:55 am-12:13 pm

Nonstop2h 18m

$97

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Mon 1/26

4:25 pm-6:13 pm

Nonstop2h 48m

Chicago O'Hare Intl

Thu 1/29

1:00 pm-4:13 pm

Nonstop2h 13m

$97

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Thu 1/22

8:15 am-10:03 am

Nonstop2h 48m

Chicago O'Hare Intl

Mon 1/26

8:00 am-11:13 am

Nonstop2h 13m

$97

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Thu 1/15

11:15 am-1:11 pm

Nonstop2h 56m

Chicago O'Hare Intl

Mon 1/19

8:00 pm-11:21 pm

Nonstop2h 21m

$97

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Sat 3/7

7:40 am-9:22 am

Nonstop2h 42m

Chicago O'Hare Intl

Wed 3/11

7:00 am-7:50 pm

1 stop11h 50m

$110

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/30

Showing 1-10 of 60 results
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Best time to book a flight from Pennsylvania to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Pennsylvania 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 Pennsylvania to Illinois

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

Currently, December is the cheapest month in which you can book a flight from Pennsylvania to Illinois (average of $60). Flying from Pennsylvania to Illinois in February is currently the most expensive (average of $148). 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 PA to IL?

Find hourly flight availability from Pennsylvania 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 December 30, 2025.

When flying from Pennsylvania to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 21% versus a flight in the morning.

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

Use this chart to determine the cheapest time to fly round-trip from Pennsylvania to Illinois. Price data was last updated on December 27, 2025.

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

Weekly flight availability from Pennsylvania to Illinois

Explore weekly flight availability from Pennsylvania 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 December 30, 2025.

The most flights from USPA to USIL are scheduled on a Tuesday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 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 December 30, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Pennsylvania to Illinois by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,251 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,013 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,124 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,074 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,069 reviews
Southwest
8.0
Very good
4,251 reviews

Comfort

8.0

Overall

8.0

Boarding

8.1

Food

7.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

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

  • How long is the flight from Pennsylvania to Illinois?

    JetBlue, United Airlines, and Southwest can get you from Pennsylvania to Illinois in just under 2h 45m. Your travel time will be generally consistent. There are 731 mi between Pennsylvania and Illinois. Generally, flights for this route are nonstop.

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

    The cheapest airlines for a one-way flight from Pennsylvania to Illinois are Southwest ($38), American Airlines ($48), and Frontier ($49).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Pennsylvania 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 Pennsylvania to Illinois?

    Currently, December is the cheapest month in which you can book a flight from Pennsylvania to Illinois (average of $60). Flying from Pennsylvania to Illinois in February is currently the most expensive (average of $148). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Pennsylvania 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 Pennsylvania to Illinois

Discover the top 6 airlines that operate flights from Pennsylvania 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 December 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$179FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$185FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$91Average$370FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$316FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$104Average$393FlexibilityNo cancel feeOn-time69%
DeltaCheapest$118Average$420FlexibilityNo cancel feeOn-timeN/A

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