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$84+ 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 4/29. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
1 adult, Economy
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Cheap flight deals from Philadelphia to Illinois

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$167
(Kiwi.com)

One-way from

$84
(Priceline)

Popular in

February

Cheapest in

September

Average price

$293

Good round-trip deal

$278 or less

Good one-way deal

$161 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 Philadelphia to Illinois
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One-way flight from Philadelphia to Illinois
Search Deals
Highest demand for flights based on searches. 29% potential increase in price ($86 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Philadelphia to Illinois.
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Price to beat on a one-way flight from Philadelphia to Illinois.
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Find 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 March 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 3/25. 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.
Tue 4/156:31 pmPHL - MDW
Nonstop2h 20mFrontier
Thu 4/174:30 pmMDW - PHL
Nonstop1h 58mFrontier
Deal found 3/25$167
This Mytrip deal was found by Cheapflights users on 3/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/247:03 pmPHL - ORD
2 stops15h 21mSpirit Airlines
Mon 4/2810:19 amORD - PHL
2 stops23h 39mSpirit Airlines
Deal found 3/24$171
This Mytrip deal was found by Cheapflights users on 3/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/28:41 pmPHL - ORD
1 stop12h 23mMultiple Airlines
Mon 5/512:58 pmORD - PHL
Nonstop2h 08mMultiple Airlines
Deal found 3/25$173
This United Airlines deal was found by Cheapflights users on 3/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/296:41 amPHL - ORD
Nonstop2h 24mUnited Airlines
Mon 5/59:40 pmORD - PHL
Nonstop2h 04mUnited Airlines
Deal found 3/25$177
This Southwest deal was found by Cheapflights users on 3/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/294:35 pmPHL - MDW
Nonstop2h 10mSouthwest
Fri 5/26:30 pmMDW - PHL
Nonstop1h 55mSouthwest
Deal found 3/25$177
This American Airlines deal was found by Cheapflights users on 3/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/211:37 pmPHL - ORD
Nonstop2h 26mAmerican Airlines
Tue 5/278:45 pmORD - PHL
Nonstop2h 13mAmerican Airlines
Deal found 3/25$178
This JetBlue Airways deal was found by Cheapflights users on 3/23. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/1710:25 amPHL - ORD
1 stop7h 31mJetBlue
Tue 6/248:40 amORD - PHL
1 stop8h 10mJetBlue
Deal found 3/23$181
This CheapOair deal was found by Cheapflights users on 3/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/183:38 pmPHL - ORD
Nonstop2h 33mFrontier
Mon 6/239:56 pmORD - PHL
1 stop30h 53mFrontier
Deal found 3/24$201
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/211:31 amPHL - MDW
1 stop6h 48mDelta
Mon 5/56:45 pmMDW - PHL
1 stop5h 04mDelta
Deal found 3/25$217
This Delta deal was found by Cheapflights users on 3/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:00 amPHL - ORD
1 stop5h 23mDelta
Mon 4/286:15 pmORD - PHL
1 stop4h 00mDelta
Deal found 3/25$228
This Frontier deal was found by Cheapflights users on 3/25. 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.
Mon 5/266:47 pmPHL - STL
1 stop6h 05mFrontier
Tue 6/35:45 pmSTL - PHL
1 stop6h 26mFrontier
Deal found 3/25$258
This KAYAK deal was found by Cheapflights users on 3/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/86:05 amPHL - ORD
2 stops16h 25mSouthwest
Wed 4/97:30 amORD - PHL
2 stops13h 40mSouthwest
Deal found 3/25$265

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 March 26, 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 - MDW

PHLMDW

Philadelphia

Tue 4/15

6:31 pm-7:51 pm

Nonstop2h 20m

Chicago Midway

Thu 4/17

4:30 pm-7:28 pm

Nonstop1h 58m

$167

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 4/24

7:03 pm-9:24 am

2 stops15h 21m

Chicago O'Hare Intl

Mon 4/28

10:19 am-10:58 am

2 stops23h 39m

$171

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Fri 5/2

8:41 pm-8:04 am

1 stop12h 23m

Chicago O'Hare Intl

Mon 5/5

12:58 pm-4:06 pm

Nonstop2h 08m

$173

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 4/29

6:41 am-8:05 am

Nonstop2h 24m

Chicago O'Hare Intl

Mon 5/5

9:40 pm-12:44 am

Nonstop2h 04m

$177

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Tue 4/29

6:35 pm-7:45 pm

Nonstop2h 10m

Chicago Midway

Fri 5/2

6:30 pm-9:25 pm

Nonstop1h 55m

$177

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 5/21

1:37 pm-3:03 pm

Nonstop2h 26m

Chicago O'Hare Intl

Tue 5/27

8:45 pm-11:58 pm

Nonstop2h 13m

$178

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 6/17

10:25 am-4:56 pm

1 stop7h 31m

Chicago O'Hare Intl

Tue 6/24

8:40 am-5:50 pm

1 stop8h 10m

$181

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 6/18

3:38 pm-5:11 pm

Nonstop2h 33m

Chicago O'Hare Intl

Mon 6/23

9:56 pm-5:49 am

1 stop30h 53m

$201

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Fri 5/2

11:31 am-5:19 pm

1 stop6h 48m

Chicago Midway

Mon 5/5

6:45 pm-12:49 am

1 stop5h 04m

$217

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Sat 4/26

6:00 am-10:23 am

1 stop5h 23m

Chicago O'Hare Intl

Mon 4/28

6:15 pm-11:15 pm

1 stop4h 00m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 57 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, August is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $245). Flying from Philadelphia to Illinois in March is currently the most expensive (average of $323). 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 March 26, 2025.

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

Weekly flight availability from Philadelphia to Illinois

Explore weekly flight availability from Philadelphia 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 March 26, 2025.

The most flights from PHL to USIL are scheduled on a Tuesday (41 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 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 March 26, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines from Philadelphia to Illinois have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,273 reviews

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,273 reviews

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,922 reviews
Southwest
8.1
Very good
4,273 reviews

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,273 reviews

Comfort

8.1

Food

7.1

Overall

8.1

Entertainment

7.6

Crew

8.6

Boarding

8.2

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

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

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $84. Users have also found prices from $89 and $89 on United 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: Emirates (100%), SWISS (100%), Republic Airways (100%).

  • What are the cheapest flights from Philadelphia to Illinois?

    The cheapest flight price from Philadelphia to Illinois is $88. On average you can expect to pay $1,278. The most popular route, (Philadelphia - Chicago O'Hare Intl), can usually be booked for $155.

  • 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, August is the cheapest month in which you can book a flight from Philadelphia to Illinois (average of $245). Flying from Philadelphia to Illinois in March is currently the most expensive (average of $323). 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 5 airlines flying from Philadelphia to Illinois

Discover the top 5 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$122FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$132Average$477FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$140Average$341FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$162Average$300FlexibilityNo cancel feeOn-time63%
DeltaCheapest$186Average$313FlexibilityNo cancel feeOn-timeN/A
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