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$55+ Cheap flights from Illinois to Philadelphia (PHL)

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 11/13. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHL
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap flight deals from Illinois to Philadelphia

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

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$108
(Frontier)

One-way from

$55
(Priceline)

Popular in

March

Cheapest in

October

Average price

$196

Good round-trip deal

$129 or less

Good one-way deal

$88 or less
Provider with most accurate pricing for Chicago (CHI)-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Philadelphia flights.
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From Illinois to Philadelphia
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One-way flight from Illinois to Philadelphia
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Highest demand for flights based on searches. 17% potential increase in price ($57 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Illinois to Philadelphia.
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Price to beat on a one-way flight from Illinois to Philadelphia.
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Find flight deals from Illinois to Philadelphia

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

This Frontier deal was found by Cheapflights users on 10/28. 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.
Mon 11/108:26 amORD - PHL
Nonstop2h 13mFrontier
Mon 11/107:04 pmPHL - ORD
Nonstop2h 38mFrontier
Deal found 10/28$108
This CheapOair deal was found by Cheapflights users on 10/30. 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.
Thu 11/1310:12 amMDW - PHL
1 stop20h 18mFrontier
Sat 11/156:19 amPHL - MDW
1 stop30h 11mFrontier
Deal found 10/30$110
This Priceline deal was found by Cheapflights users on 10/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/132:12 pmSTL - PHL
1 stop6h 10mFrontier
Mon 11/175:05 amPHL - STL
1 stop9h 12mFrontier
Deal found 10/29$110
This CheapOair deal was found by Cheapflights users on 10/28. 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.
Thu 11/135:11 amORD - PHL
1 stop5h 18mFrontier
Thu 11/137:54 pmPHL - ORD
1 stop22h 21mFrontier
Deal found 10/28$110
This Frontier deal was found by Cheapflights users on 10/29. 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.
Thu 11/139:15 amMDW - PHL
Nonstop2h 04mFrontier
Mon 11/171:19 pmPHL - MDW
Nonstop2h 14mFrontier
Deal found 10/29$111
This Frontier deal was found by Cheapflights users on 10/29. 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.
Thu 11/138:26 amORD - PHL
Nonstop2h 13mFrontier
Mon 11/176:00 amPHL - ORD
Nonstop2h 26mFrontier
Deal found 10/29$111
This Frontier deal was found by Cheapflights users on 10/28. 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.
Mon 11/108:26 amORD - PHL
Nonstop2h 13mFrontier
Sun 11/169:33 amPHL - ORD
Nonstop2h 29mFrontier
Deal found 10/28$112
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Mon 11/247:10 pmMDW - PHL
Nonstop1h 56mFrontier
Tue 12/26:22 pmPHL - MDW
1 stop15h 24mFrontier
Deal found 10/29$113
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Mon 11/245:30 amORD - PHL
Nonstop2h 07mFrontier
Tue 12/212:20 pmPHL - ORD
1 stop7h 26mFrontier
Deal found 10/29$113
This Frontier deal was found by Cheapflights users on 10/28. 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.
Thu 11/1311:50 amORD - PHL
1 stop11h 49mFrontier
Fri 11/146:00 amPHL - ORD
Nonstop2h 26mFrontier
Deal found 10/28$114
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 11/79:47 pmORD - PHL
Nonstop2h 12mFrontier
Fri 12/511:10 amPHL - ORD
Nonstop2h 30mFrontier
Deal found 10/28$115
This CheapOair deal was found by Cheapflights users on 10/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:30 amMDW - PHL
1 stop11h 14mFrontier
Sun 11/166:15 amPHL - MDW
Nonstop2h 15mFrontier
Deal found 10/29$116

Cheapflights Fare Finder

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

Fly from

Illinois

Fly to

Philadelphia

Route

Depart

Return

Price

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Mon 11/17

9:15 am-12:19 pm

Nonstop2h 04m

Philadelphia

Thu 11/20

6:09 pm-7:31 pm

Nonstop2h 22m

$136

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 12/6

11:05 am-2:07 pm

Nonstop2h 02m

Philadelphia

Tue 12/9

10:15 am-11:35 am

Nonstop2h 20m

$139

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 1/17

2:30 pm-5:34 pm

Nonstop2h 04m

Philadelphia

Mon 1/19

6:30 am-7:59 am

Nonstop2h 29m

$148

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Tue 12/2

6:05 pm-9:00 pm

Nonstop1h 55m

Philadelphia

Thu 12/4

6:00 am-7:15 am

Nonstop2h 15m

$158

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Fri 12/5

2:30 pm-5:39 pm

Nonstop2h 09m

Philadelphia

Tue 12/9

6:30 am-7:56 am

Nonstop2h 26m

$158

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Tue 12/2

9:00 am-12:07 pm

Nonstop2h 07m

Philadelphia

Thu 12/4

6:30 am-7:56 am

Nonstop2h 26m

$158

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 12/4

3:30 pm-12:40 am

1 stop8h 10m

Philadelphia

Mon 12/8

2:06 pm-10:33 pm

1 stop9h 27m

$170

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Sat 1/17

5:55 pm-12:23 am

1 stop5h 28m

Philadelphia

Wed 1/21

6:00 am-9:40 am

1 stop4h 40m

$177

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Thu 12/11

8:10 am-11:05 am

Nonstop1h 55m

Philadelphia

Sun 12/14

12:35 pm-1:45 pm

Nonstop2h 10m

$177

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Fri 12/12

7:15 pm-10:10 pm

Nonstop1h 55m

Philadelphia

Mon 12/15

6:15 pm-7:25 pm

Nonstop2h 10m

$177

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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

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

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

Currently, November is the cheapest month in which you can book a flight from Illinois to Philadelphia (average of $50). Flying from Illinois to Philadelphia in July is currently the most expensive (average of $104). 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 IL to PHL?

Find hourly flight availability from Illinois to Philadelphia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

When flying from Illinois to Philadelphia, 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 48% versus a flight in the afternoon.

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

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

Travelers seeking maximum savings on their Illinois to Philadelphia flight should consider departing on Saturday at noon 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.

Related info for your journey

Find useful and relevant information for your journey from Illinois to Philadelphia. 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 into for flights to Philadelphia from Illinois?

    Philadelphia (PHL) is the airport you will fly into if you book a flight from Illinois to Philadelphia. It is only a 7.0 mi journey from Philadelphia (PHL) to Philadelphia’s city center.

  • How long is the flight from Illinois to Philadelphia?

    For as low as $158, Frontier can have you in Philadelphia from Illinois in 1h 55m. Airlines will cover a distance of 666 mi. All flights are typically nonstop.

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

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $70. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Illinois to Philadelphia for a low price.

  • What are the most popular routes from Illinois to Philadelphia?

    Most travelers choose Chicago O'Hare Intl - Philadelphia, Chicago Midway - Philadelphia or Lambert-St Louis - Philadelphia when deciding on the best route from Illinois to Philadelphia.

  • What are the most reliable airlines from Illinois to Philadelphia?

    Consider United Airlines (86%), Air New Zealand (80%) or Air Canada (78%) when booking your flight. These represent the most reliable airlines when flying from Illinois to Philadelphia.

  • What are the cheapest flights from Illinois to Philadelphia?

    Looking for the cheapest flight from Illinois to Philadelphia? While on average our users pay $434, our data indicates the cheapest price to be $72. The most popular route (Chicago O'Hare Intl - Philadelphia), is priced around $84.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Illinois to Philadelphia (average of $50). Flying from Illinois to Philadelphia in July is currently the most expensive (average of $104). 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

Traveling to a place near Philadelphia?

Book flights to Philadelphia if you plan to visit one of these locations
Wildwood
King of Prussia
Pottstown
Reading
Ocean City
Cherry Hill
Dewey Beach
Ephrata
Camden
Vineland
Milford
Dover
Elkton
Essington
Willow Grove
Newark
Millville
Chester
Exton
Havre de Grace

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to Philadelphia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Illinois to Philadelphia

Discover the top 6 airlines that operate flights from Illinois to Philadelphia. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$63Average$260FlexibilityNo cancel feeOn-time65%
FrontierCheapest$68Average$166FlexibilityNo cancel feeOn-time62%
DeltaCheapest$108Average$477FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$150Average$462FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$159Average$447FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$167Average$303FlexibilityNo cancel feeOn-time63%

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