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$65+ 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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
janv. 17 — janv. 241
sam. 1/17
sam. 1/24
1 adult, Economy
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Cheap 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 décembre 18, 2025.

This Priceline deal was found by Cheapflights users on 12/15. 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.
mer. 12/316:36 pmPHL - ORD
Nonstop2h 30mFrontier
lun. 1/512:39 pmORD - PHL
1 stop5h 52mFrontier
Deal found 12/15$120
This Expedia deal was found by Cheapflights users on 12/17. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 12/316:36 pmPHL - ORD
Nonstop2h 30mFrontier
ven. 1/25:45 amORD - PHL
1 stop17h 41mFrontier
Deal found 12/17$121
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
mer. 12/246:36 pmPHL - ORD
Nonstop2h 30mFrontier
mer. 12/312:15 pmORD - PHL
Nonstop2h 15mFrontier
Deal found 12/15$127
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
mer. 12/246:36 pmPHL - ORD
Nonstop2h 30mFrontier
ven. 12/265:15 amORD - PHL
Nonstop2h 15mFrontier
Deal found 12/17$132
This Kiwi.com deal was found by Cheapflights users on 12/16. 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.
mer. 12/246:36 pmPHL - ORD
Nonstop2h 30mFrontier
mar. 12/306:50 amORD - PHL
1 stop14h 21mFrontier
Deal found 12/16$133
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
mer. 12/246:36 pmPHL - ORD
Nonstop2h 30mFrontier
ven. 1/25:45 amORD - PHL
1 stop15h 32mFrontier
Deal found 12/15$134
This United Airlines deal was found by Cheapflights users on 12/17. 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.
mer. 12/316:35 amPHL - ORD
Nonstop2h 28mUnited Airlines
jeu. 1/16:15 pmORD - PHL
Nonstop2h 16mUnited Airlines
Deal found 12/17$139
This Kiwi.com deal was found by Cheapflights users on 12/17. 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.
mer. 12/316:36 pmPHL - ORD
Nonstop2h 30mMultiple Airlines
jeu. 1/15:25 amORD - PHL
1 stop12h 44mMultiple Airlines
Deal found 12/17$142
This Frontier deal was found by Cheapflights users on 12/16. 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.
mer. 12/246:36 pmPHL - ORD
Nonstop2h 30mFrontier
jeu. 12/255:25 amORD - PHL
1 stop10h 31mFrontier
Deal found 12/16$145
This Priceline deal was found by Cheapflights users on 12/17. 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.
mer. 12/312:25 pmPHL - MDW
1 stop8h 47mFrontier
jeu. 1/13:10 pmMDW - PHL
1 stop8h 30mFrontier
Deal found 12/17$164
This Delta deal was found by Cheapflights users on 12/17. 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.
jeu. 12/258:05 amPHL - MDW
1 stop7h 35mDelta
mer. 12/316:08 pmMDW - PHL
1 stop4h 09mDelta
Deal found 12/17$177
This CheapOair deal was found by Cheapflights users on 12/17. 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.
mer. 12/312:25 pmPHL - MDW
1 stop8h 47mFrontier
dim. 1/410:50 pmMDW - PHL
1 stop29h 41mFrontier
Deal found 12/17$199

Find flight deals from Philadelphia to Illinois

Keep the following information in mind while searching for Philadelphia to Illinois flight deals. Data was last updated décembre 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$99
(Kiwi.com)

One-way from

$65
(Mytrip)

Popular in

February

Cheapest in

September

Average price

$275

Good round-trip deal

$227 or less

Good one-way deal

$168 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 Philadelphia to Illinois
Search Deals
One-way flight from Philadelphia to Illinois
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($43 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 Philadelphia to Illinois.
Search Deals
Price to beat on a one-way flight from Philadelphia to Illinois.
Search Deals

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 décembre 18, 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

ven. 1/9

8:20 am-9:03 pm

1 stop13h 43m

Chicago O'Hare Intl

mer. 1/14

10:48 am-10:03 pm

1 stop10h 15m

$153

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

ven. 1/23

5:00 pm-6:30 pm

Nonstop2h 30m

Chicago O'Hare Intl

mar. 1/27

11:20 am-2:31 pm

Nonstop2h 11m

$158

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

dim. 2/1

5:00 pm-6:30 pm

Nonstop2h 30m

Chicago O'Hare Intl

mar. 2/3

2:30 pm-5:34 pm

Nonstop2h 04m

$158

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

ven. 1/16

6:30 am-7:59 am

Nonstop2h 29m

Chicago O'Hare Intl

mar. 1/20

8:56 am-12:07 pm

Nonstop2h 11m

$158

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

jeu. 1/8

1:38 pm-10:33 pm

1 stop9h 55m

Lambert-St Louis

lun. 1/12

5:11 pm-12:29 am

1 stop6h 18m

$162

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

sam. 1/10

5:30 am-10:33 pm

1 stop18h 03m

Lambert-St Louis

mar. 1/13

5:11 pm-11:14 am

2 stops17h 03m

$172

PhiladelphiaSt. Louis

PHL - STL

PHLSTL

Philadelphia

jeu. 1/8

6:01 pm-7:50 am

1 stop14h 49m

Lambert-St Louis

ven. 1/16

8:32 pm-10:46 am

1 stop13h 14m

$176

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

sam. 1/24

9:40 am-1:08 pm

1 stop4h 28m

Chicago O'Hare Intl

sam. 1/24

5:35 pm-11:13 pm

1 stop4h 38m

$177

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

ven. 1/30

5:45 pm-7:00 pm

Nonstop2h 15m

Chicago Midway

dim. 2/1

9:40 am-12:35 pm

Nonstop1h 55m

$177

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

sam. 1/24

5:57 pm-10:22 pm

1 stop5h 25m

Chicago Midway

mer. 1/28

6:35 pm-11:13 pm

1 stop3h 38m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

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, May is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $55). Flying from Philadelphia to Illinois in July is currently the most expensive (average of $126). 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 décembre 18, 2025.

It’s optimal to fly from Philadelphia to Illinois in the evening. By choosing this option you can save up to 50% on the cost of your flight, compared to a flight at noon.

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

Use this chart to determine the cheapest time to fly round-trip from Philadelphia to Illinois. Price data was last updated on December 16, 2024.

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

How much does it cost to fly round-trip from Philadelphia to Illinois?

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 décembre 18, 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
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
8,005 reviews
Southwest
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
9,091 reviews
Southwest
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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
5.8
Fair
3,081 reviews
Southwest
7.9
Good
4,250 reviews

Overall

7.9

Crew

8.6

Comfort

8.0

Entertainment

7.5

Food

7.0

Boarding

8.1

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 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?

    Spirit Airlines, United Airlines, and Frontier can get you from Philadelphia to Illinois in just under 2h 30m. Your travel time can differ by up to 11h 13m. The distance from Philadelphia to Illinois is about 676 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 Frontier. According to our data, you can fly for as low as $46. Users have also found prices from $55 and $70 on Spirit Airlines and Southwest, 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: ANA (80%), Japan Airlines (78%), Copa Airlines (75%).

  • What are the cheapest flights from Philadelphia to Illinois?

    The cheapest flight price from Philadelphia to Illinois is $74. On average you can expect to pay $1,211. The most popular route, (Philadelphia - Chicago O'Hare Intl), can usually be booked for $84.

  • 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, May is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $55). Flying from Philadelphia to Illinois in July is currently the most expensive (average of $126). 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 décembre 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$77Average$180FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$185FlexibilityNo cancel feeOn-time65%
DeltaCheapest$118Average$352FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$156Average$364FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$161Average$322FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$168Average$409FlexibilityNo cancel feeOn-time71%

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