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$81+ 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 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — PHL
May 17 — May 241
Sat 5/17
Sat 5/24
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 May 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$156
(Cheapflightsfares)

One-way from

$81
(Southwest)

Popular in

March

Cheapest in

August

Average price

$218

Good round-trip deal

$192 or less

Good one-way deal

$108 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
Search Deals
Highest demand for flights based on searches. 32% potential increase in price ($108 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 5/12. 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 9/48:15 amMDW - PHL
Nonstop2h 02mFrontier
Sun 9/76:05 amPHL - MDW
Nonstop2h 15mFrontier
Deal found 5/12$156
This Cheapflightsfares deal was found by Cheapflights users on 5/11. 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 6/268:24 amORD - PHL
Nonstop2h 19mFrontier
Mon 6/305:48 pmPHL - ORD
Nonstop2h 29mFrontier
Deal found 5/11$156
This Kiwi.com deal was found by Cheapflights users on 5/11. 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.
Thu 5/2910:00 amORD - PHL
1 stop6h 27mMultiple Airlines
Mon 6/24:28 pmPHL - ORD
Nonstop2h 36mMultiple Airlines
Deal found 5/11$159
This Southwest deal was found by Cheapflights users on 5/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/39:15 pmMDW - PHL
Nonstop2h 00mSouthwest
Mon 7/75:10 pmPHL - MDW
Nonstop2h 05mSouthwest
Deal found 5/11$179
This United Airlines deal was found by Cheapflights users on 5/11. 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.
Thu 6/269:23 pmORD - PHL
Nonstop2h 07mUnited Airlines
Tue 7/16:30 amPHL - ORD
Nonstop2h 24mUnited Airlines
Deal found 5/11$179
This Mytrip deal was found by Cheapflights users on 5/10. 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 5/277:47 amORD - PHL
1 stop23h 01mSpirit Airlines
Thu 5/2912:23 pmPHL - ORD
1 stop21h 32mSpirit Airlines
Deal found 5/10$182
This Delta deal was found by Cheapflights users on 5/11. 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.
Wed 7/29:24 amMDW - PHL
1 stop5h 52mDelta
Wed 7/236:00 amPHL - MDW
1 stop3h 39mDelta
Deal found 5/11$206
This Delta deal was found by Cheapflights users on 5/11. 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.
Tue 7/111:00 amORD - PHL
1 stop4h 16mDelta
Thu 7/244:05 pmPHL - ORD
1 stop6h 25mDelta
Deal found 5/11$206
This American Airlines deal was found by Cheapflights users on 5/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/109:22 amORD - PHL
1 stop4h 17mAmerican Airlines
Tue 6/177:30 amPHL - ORD
Nonstop2h 30mAmerican Airlines
Deal found 5/12$227
This CheapOair deal was found by Cheapflights users on 5/10. 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 5/215:45 pmSTL - PHL
1 stop12h 55mFrontier
Mon 5/2610:29 pmPHL - STL
1 stop26h 15mFrontier
Deal found 5/10$260
This Southwest deal was found by Cheapflights users on 5/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/302:55 pmORD - PHL
1 stop4h 30mSouthwest
Mon 9/11:35 pmPHL - ORD
1 stop8h 55mSouthwest
Deal found 5/10$261
This Mytrip deal was found by Cheapflights users on 5/11. 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.
Sun 6/156:36 pmSTL - PHL
2 stops27h 03mMultiple Airlines
Thu 6/192:38 pmPHL - STL
2 stops29h 03mMultiple Airlines
Deal found 5/11$266

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 May 12, 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

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Thu 6/26

8:24 am-11:43 am

Nonstop2h 19m

Philadelphia

Mon 6/30

5:48 pm-7:17 pm

Nonstop2h 29m

$156

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Thu 5/29

10:00 am-5:27 pm

1 stop6h 27m

Philadelphia

Mon 6/2

4:28 pm-6:04 pm

Nonstop2h 36m

$159

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Mon 6/2

8:52 pm-11:56 pm

Nonstop2h 04m

Philadelphia

Fri 6/6

6:35 pm-7:52 pm

Nonstop2h 17m

$164

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Thu 7/3

9:15 pm-12:15 am

Nonstop2h 00m

Philadelphia

Mon 7/7

5:10 pm-6:15 pm

Nonstop2h 05m

$179

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Thu 6/26

9:23 pm-12:30 am

Nonstop2h 07m

Philadelphia

Tue 7/1

6:30 am-7:54 am

Nonstop2h 24m

$179

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Tue 5/27

7:47 am-7:48 am

1 stop23h 01m

Philadelphia

Thu 5/29

12:23 pm-8:55 am

1 stop21h 32m

$182

ChicagoPhiladelphia

MDW - PHL

MDWPHL

Chicago Midway

Wed 7/2

9:24 am-4:16 pm

1 stop5h 52m

Philadelphia

Wed 7/23

6:00 am-8:39 am

1 stop3h 39m

$206

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Tue 7/1

11:00 am-4:16 pm

1 stop4h 16m

Philadelphia

Thu 7/24

4:05 pm-9:30 pm

1 stop6h 25m

$206

ChicagoPhiladelphia

ORD - PHL

ORDPHL

Chicago O'Hare Intl

Tue 6/10

9:22 am-2:39 pm

1 stop4h 17m

Philadelphia

Tue 6/17

7:30 am-9:00 am

Nonstop2h 30m

$227

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/21

5:45 pm-7:40 am

1 stop12h 55m

Philadelphia

Mon 5/26

10:29 pm-11:44 pm

1 stop26h 15m

$260

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/12

Showing 1-10 of 55 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, August is the cheapest month in which you can book a flight from Illinois to Philadelphia (average of $236). Flying from Illinois to Philadelphia in March is currently the most expensive (average of $295). 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 May 12, 2025.

When flying from Illinois to Philadelphia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Illinois to Philadelphia

Explore weekly flight availability from Illinois to Philadelphia. 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 May 12, 2025.

The most flights from USIL to PHL are scheduled on a Monday (46 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (38 on average).

Rainfall in Philadelphia by month

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

In terms of precipitation, rainfall in Philadelphia ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Philadelphia when rainfall is around 2.7 in.

Temperature in Philadelphia by month

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

If weather is an important factor for your trip to Philadelphia, 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 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Philadelphia

Get insights into the airlines that provide service to Philadelphia. 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 Philadelphia. Reviews last updated May 12, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Illinois to Philadelphia have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,290 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,724 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.1

Boarding

8.1

Overall

8.0

Food

7.1

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $81. However, be on the lookout for offers from United Airlines and Frontier, 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 Qatar Airways (84%), Air Canada (83%) or Alaska Airlines (81%) 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 $525, our data indicates the cheapest price to be $80. The most popular route (Chicago O'Hare Intl - Philadelphia), is priced around $138.

  • 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, August is the cheapest month in which you can book a flight from Illinois to Philadelphia (average of $236). Flying from Illinois to Philadelphia in March is currently the most expensive (average of $295). 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 Illinois?

Book flights to Illinois if you plan to visit one of these locations
Vineland
Pottstown
Wildwood
Reading
King of Prussia
Cherry Hill
Exton
Ocean City
Essington
Chester
Middletown
Willow Grove
Newark
Millville
Dover
Ephrata
Camden
Dewey Beach
Glen Mills
Springfield

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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 5 airlines flying from Illinois to Philadelphia

Discover the top 5 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 May 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$52Average$110FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$63Average$333FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$136Average$339FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$150Average$464FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$167Average$290FlexibilityNo cancel feeOn-time63%

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