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$54+ 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 12/8. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
1 adult, Economy
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Cheap flight deals from Pennsylvania to Illinois

Keep the following information in mind while searching for Pennsylvania to Illinois flight deals. Data was last updated November 26, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$84
(CheapOair)

One-way from

$54
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$212

Good round-trip deal

$163 or less

Good one-way deal

$166 or less
Provider with most accurate pricing for Philadelphia-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Chicago (CHI) flights.
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From Pennsylvania to Illinois
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One-way flight from Pennsylvania to Illinois
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Highest demand for flights based on searches. 15% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Price to beat on a round-trip flight from Pennsylvania to Illinois.
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Price to beat on a one-way flight from Pennsylvania to Illinois.
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Find 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 November 26, 2025.

This Frontier deal was found by Cheapflights users on 11/25. 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.
Wed 12/31:00 pmJFK - ORD
Nonstop2h 57mFrontier
Fri 12/58:36 amORD - JFK
Nonstop2h 24mFrontier
Deal found 11/25$84
This eDestinos deal was found by Cheapflights users on 11/24. 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.
Thu 12/48:41 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Mon 12/84:38 pmORD - LGA
Nonstop2h 04mSpirit Airlines
Deal found 11/24$85
This Super.com deal was found by Cheapflights users on 11/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:30 amLGA - ORD
Nonstop2h 31mSpirit Airlines
Tue 12/23:53 pmORD - LGA
Nonstop2h 07mSpirit Airlines
Deal found 11/25$86
This Mytrip deal was found by Cheapflights users on 11/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:30 amLGA - ORD
Nonstop2h 31mSpirit Airlines
Wed 12/33:53 pmORD - LGA
Nonstop2h 07mSpirit Airlines
Deal found 11/26$87
This Flightnetwork deal was found by Cheapflights users on 11/25. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:30 amLGA - ORD
Nonstop2h 31mSpirit Airlines
Wed 12/310:59 amORD - LGA
Nonstop2h 05mSpirit Airlines
Deal found 11/25$88
This Kiwi.com deal was found by Cheapflights users on 11/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/151:00 pmJFK - ORD
Nonstop2h 57mFrontier
Fri 12/196:40 amORD - JFK
Nonstop2h 24mFrontier
Deal found 11/25$89
This Booking.com deal was found by Cheapflights users on 11/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:59 pmLGA - ORD
Nonstop2h 32mSpirit Airlines
Sat 12/64:38 pmORD - LGA
Nonstop2h 04mSpirit Airlines
Deal found 11/26$90
This Super.com deal was found by Cheapflights users on 11/25. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:00 pmJFK - ORD
Nonstop2h 57mFrontier
Fri 12/196:40 amORD - JFK
Nonstop2h 24mFrontier
Deal found 11/25$91
This CheapOair deal was found by Cheapflights users on 11/26. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2711:00 amJFK - ORD
Nonstop2h 57mFrontier
Sat 1/108:35 amORD - JFK
Nonstop2h 24mFrontier
Deal found 11/26$93
This Mytrip deal was found by Cheapflights users on 11/26. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/98:41 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Wed 12/104:38 pmORD - LGA
Nonstop2h 04mSpirit Airlines
Deal found 11/26$94
This Booking.com deal was found by Cheapflights users on 11/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:30 amLGA - ORD
Nonstop2h 31mSpirit Airlines
Sat 12/64:38 pmORD - LGA
Nonstop2h 04mSpirit Airlines
Deal found 11/25$95
This Booking.com deal was found by Cheapflights users on 11/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:41 pmLGA - ORD
Nonstop2h 30mSpirit Airlines
Mon 12/154:38 pmORD - LGA
Nonstop2h 04mSpirit Airlines
Deal found 11/25$96

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 November 26, 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

NewarkChicago

EWR - ORD

EWRORD

Newark

Mon 12/29

6:55 am-8:31 am

Nonstop2h 36m

Chicago O'Hare Intl

Thu 1/8

5:45 am-1:03 pm

1 stop6h 18m

$117

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Sat 1/17

7:00 pm-8:53 pm

Nonstop2h 53m

Chicago O'Hare Intl

Sun 1/18

7:01 am-10:30 am

Nonstop2h 29m

$137

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Thu 2/12

9:05 am-10:45 am

Nonstop2h 40m

Chicago Midway

Sun 2/15

8:00 pm-11:00 pm

Nonstop2h 00m

$138

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Sun 1/18

3:52 pm-5:45 pm

Nonstop2h 53m

Chicago O'Hare Intl

Sat 1/31

2:30 pm-6:04 pm

Nonstop2h 34m

$138

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Wed 1/14

6:00 am-7:40 am

Nonstop2h 40m

Chicago Midway

Sun 1/18

5:55 pm-9:00 pm

Nonstop2h 05m

$138

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Fri 1/16

7:30 am-9:27 am

Nonstop2h 57m

Chicago O'Hare Intl

Tue 1/20

12:15 pm-3:40 pm

Nonstop2h 25m

$138

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Sun 1/18

2:30 pm-4:22 pm

Nonstop2h 52m

Chicago O'Hare Intl

Sat 1/31

11:20 am-2:34 pm

Nonstop2h 14m

$138

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 2/10

5:00 pm-6:30 pm

Nonstop2h 30m

Chicago O'Hare Intl

Tue 2/17

7:25 am-10:24 am

Nonstop1h 59m

$139

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Fri 1/23

6:00 am-7:40 am

Nonstop2h 40m

Chicago Midway

Sun 1/25

6:05 am-9:10 am

Nonstop2h 05m

$139

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Fri 1/30

9:45 pm-11:15 pm

Nonstop2h 30m

Chicago Midway

Sun 2/1

8:10 pm-11:10 pm

Nonstop2h 00m

$139

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

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, November is the cheapest month in which you can book a flight from Pennsylvania to Illinois (average of $54). Flying from Pennsylvania to Illinois in June is currently the most expensive (average of $147). 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 November 26, 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 30% versus a flight at noon.

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 16, 2024.

Travelers seeking maximum savings on their Pennsylvania to Illinois flight should consider departing on Friday mornings when fares are most often at their lowest. Sunday 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 November 26, 2025.

The most flights from USPA to USIL are scheduled on a Wednesday (43 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (9 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 November 26, 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
4,254 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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
7.9
Good
7,999 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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
9,046 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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
11,038 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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
3,099 reviews
Southwest
8.0
Very good
4,254 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

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 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?

    Spirit Airlines, Delta, and Southwest can get you from Pennsylvania to Illinois in just under 2h 36m. Your travel time will be generally consistent. There are 716 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 Frontier ($68), Delta ($69), and United Airlines ($69).

  • 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, November is the cheapest month in which you can book a flight from Pennsylvania to Illinois (average of $54). Flying from Pennsylvania to Illinois in June is currently the most expensive (average of $147). 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 Pennsylvania to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Fort Lauderdale flights
John F Kennedy Intl to Fort Lauderdale flights
Newark to Miami flights
John F Kennedy Intl to Miami flights
Los Angeles to John F Kennedy Intl flights
LaGuardia to Fort Lauderdale flights
LaGuardia to Miami flights
Dallas/Fort Worth to John F Kennedy Intl flights
John F Kennedy Intl to Los Angeles flights
Dallas/Fort Worth to LaGuardia flights
John F Kennedy Intl to Orlando flights
John F Kennedy Intl to Las Vegas flights
Dallas/Fort Worth to Newark flights
San Francisco to John F Kennedy Intl flights
John F Kennedy Intl to Dallas/Fort Worth flights
Newark to West Palm Beach flights
LaGuardia to Dallas/Fort Worth flights
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LaGuardia to Orlando flights
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Seattle to Las Vegas flights
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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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$180FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$185FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$92Average$365FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$97Average$318FlexibilityNo cancel feeOn-time63%
DeltaCheapest$118Average$432FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$118Average$387FlexibilityNo cancel feeOn-time69%

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