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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 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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Cheap flight deals from Pennsylvania to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Pennsylvania (USPA) 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 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$106
(Cheapflightsfares)

One-way from

$54
(FlightHub)

Popular in

January

Cheapest in

September

Average price

$318

Good round-trip deal

$317 or less

Good one-way deal

$198 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. 27% potential increase in price ($76 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in January 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 January 30, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 1/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1310:59 amLGA - ORD
Nonstop2h 38mSpirit Airlines
Mon 2/177:13 pmORD - LGA
1 stop11h 17mSpirit Airlines
Deal found 1/30$106
This Frontier deal was found by Cheapflights users on 1/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2710:00 pmLGA - MDW
1 stop14h 28mFrontier
Tue 3/48:30 amMDW - LGA
1 stop12h 30mFrontier
Deal found 1/30$106
This Mytrip deal was found by Cheapflights users on 1/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/156:59 amJFK - ORD
1 stop17h 33mFrontier
Tue 5/205:48 pmORD - JFK
1 stop5h 47mFrontier
Deal found 1/30$107
This Mytrip deal was found by Cheapflights users on 1/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/91:00 pmJFK - MDW
1 stop9h 33mFrontier
Thu 4/105:15 amMDW - JFK
1 stop27h 45mFrontier
Deal found 1/29$107
This Mytrip deal was found by Cheapflights users on 1/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/205:59 pmLGA - ORD
1 stop16h 28mMultiple Airlines
Mon 2/245:44 pmORD - LGA
Nonstop1h 45mMultiple Airlines
Deal found 1/30$108
This Mytrip deal was found by Cheapflights users on 1/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/205:00 amEWR - ORD
1 stop12h 49mSpirit Airlines
Mon 2/245:15 amORD - EWR
Nonstop2h 08mSpirit Airlines
Deal found 1/30$109
This Travelocity deal was found by Cheapflights users on 1/30. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/410:10 pmEWR - MDW
1 stop9h 57mFrontier
Wed 3/58:12 amMDW - EWR
1 stop11h 58mFrontier
Deal found 1/30$110
This Frontier deal was found by Cheapflights users on 1/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2110:10 pmEWR - ORD
1 stop10h 08mFrontier
Sat 3/18:23 amORD - EWR
1 stop11h 37mFrontier
Deal found 1/30$115
This Frontier deal was found by Cheapflights users on 1/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2110:59 pmLGA - ORD
1 stop9h 19mFrontier
Tue 2/2510:56 amORD - LGA
1 stop9h 03mFrontier
Deal found 1/29$115
This Priceline deal was found by Cheapflights users on 1/30. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2810:10 pmEWR - ORD
1 stop10h 08mMultiple Airlines
Sun 3/25:15 amORD - EWR
Nonstop2h 09mMultiple Airlines
Deal found 1/30$120
This Kiwi.com deal was found by Cheapflights users on 1/29. 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.
Fri 2/2810:47 pmPHL - ORD
1 stop9h 31mFrontier
Wed 3/59:08 amORD - PHL
1 stop6h 03mFrontier
Deal found 1/29$131
This CheapOair deal was found by Cheapflights users on 1/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/175:45 amPHL - ORD
1 stop17h 43mSpirit Airlines
Tue 6/246:00 amORD - PHL
1 stop15h 42mSpirit Airlines
Deal found 1/28$132

Find flights from Pennsylvania to Illinois within your budget

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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Thu 2/13

10:59 am-12:37 pm

Nonstop2h 38m

Chicago O'Hare Intl

Mon 2/17

7:13 pm-7:30 am

1 stop11h 17m

$106

New YorkChicago

LGA - MDW

LGAMDW

New York LaGuardia

Wed 3/5

10:00 pm-11:31 am

1 stop14h 31m

Chicago Midway

Mon 3/10

12:49 pm-10:00 pm

1 stop8h 11m

$106

New YorkChicago

JFK - ORD

JFKORD

New York John F Kennedy Intl

Thu 5/15

6:59 am-11:32 pm

1 stop17h 33m

Chicago O'Hare Intl

Tue 5/20

5:48 pm-12:35 am

1 stop5h 47m

$107

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Thu 2/20

5:59 pm-9:27 am

1 stop16h 28m

Chicago O'Hare Intl

Mon 2/24

5:44 pm-8:29 pm

Nonstop1h 45m

$108

NewarkChicago

EWR - ORD

EWRORD

Newark

Thu 2/20

5:00 am-4:49 pm

1 stop12h 49m

Chicago O'Hare Intl

Mon 2/24

5:15 am-8:23 am

Nonstop2h 08m

$109

NewarkChicago

EWR - MDW

EWRMDW

Newark

Tue 3/4

10:10 pm-7:07 am

1 stop9h 57m

Chicago Midway

Wed 3/5

8:12 am-9:10 pm

1 stop11h 58m

$110

New YorkChicago

JFK - MDW

JFKMDW

New York John F Kennedy Intl

Sat 2/22

11:15 am-10:51 pm

1 stop12h 36m

Chicago Midway

Tue 2/25

8:30 am-12:02 pm

1 stop26h 32m

$110

NewarkChicago

EWR - ORD

EWRORD

Newark

Fri 2/21

10:10 pm-7:18 am

1 stop10h 08m

Chicago O'Hare Intl

Sat 3/1

8:23 am-9:00 pm

1 stop11h 37m

$115

New YorkChicago

LGA - ORD

LGAORD

New York LaGuardia

Fri 2/21

10:59 pm-7:18 am

1 stop9h 19m

Chicago O'Hare Intl

Tue 2/25

10:56 am-8:59 pm

1 stop9h 03m

$115

NewarkChicago

EWR - ORD

EWRORD

Newark

Tue 2/18

10:10 pm-7:28 am

1 stop10h 18m

Chicago O'Hare Intl

Sat 2/22

5:15 am-8:23 am

Nonstop2h 08m

$117

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

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.

Travel insights for flights from Pennsylvania to Illinois

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

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

Currently, August is the cheapest month in which you can book a flight from Pennsylvania to Illinois (average of $245). Flying from Pennsylvania to Illinois in March is currently the most expensive (average of $325). 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 January 30, 2025.

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

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 January 30, 2025.

The most flights from USPA to USIL are scheduled on a Tuesday (36 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

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 January 30, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Pennsylvania to Illinois to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,153 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Food

7.1

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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.

  • 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 Spirit Airlines ($54), Frontier ($56), and Delta ($73).

  • 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, August is the cheapest month in which you can book a flight from Pennsylvania to Illinois (average of $245). Flying from Pennsylvania to Illinois in March is currently the most expensive (average of $325). 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.
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Top 5 airlines flying from Pennsylvania to Illinois

Discover the top 5 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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$123FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$127Average$417FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$135Average$370FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$151Average$280FlexibilityNo cancel feeOn-time63%
DeltaCheapest$155Average$373FlexibilityNo cancel feeOn-timeN/A
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