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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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$156
(Frontier)

One-way from

$84
(Mytrip)

Popular in

March

Cheapest in

September

Average price

$271

Good round-trip deal

$211 or less

Good one-way deal

$129 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. 28% potential increase in price ($84 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Frontier deal was found by Cheapflights users on 4/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/94:12 pmPHL - MDW
Nonstop2h 16mFrontier
Mon 5/1212:15 pmMDW - PHL
Nonstop2h 02mFrontier
Deal found 4/15$156
This Frontier deal was found by Cheapflights users on 4/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/303:39 pmPHL - ORD
Nonstop2h 22mFrontier
Fri 6/67:04 pmORD - PHL
Nonstop2h 26mFrontier
Deal found 4/15$167
This American Airlines deal was found by Cheapflights users on 4/14. 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 7/212:49 pmPHL - ORD
Nonstop2h 25mAmerican Airlines
Tue 7/85:00 amORD - PHL
Nonstop2h 00mAmerican Airlines
Deal found 4/14$169
This United Airlines deal was found by Cheapflights users on 4/14. 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.
Wed 5/211:10 pmPHL - ORD
Nonstop2h 24mUnited Airlines
Sun 5/257:25 amORD - PHL
Nonstop2h 12mUnited Airlines
Deal found 4/14$170
This Southwest deal was found by Cheapflights users on 4/14. 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.
Wed 5/214:35 pmPHL - MDW
Nonstop2h 10mSouthwest
Sun 5/253:20 pmMDW - PHL
Nonstop1h 55mSouthwest
Deal found 4/14$170
This Kiwi.com deal was found by Cheapflights users on 4/13. 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 5/95:53 pmPHL - ORD
Nonstop2h 28mMultiple Airlines
Tue 5/1312:41 pmORD - PHL
1 stop9h 02mMultiple Airlines
Deal found 4/13$172
This Mytrip deal was found by Cheapflights users on 4/14. 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.
Mon 5/124:00 pmPHL - ORD
2 stops32h 04mSpirit Airlines
Wed 5/1412:41 pmORD - PHL
1 stop9h 02mSpirit Airlines
Deal found 4/14$177
This Delta deal was found by Cheapflights users on 4/14. 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 5/246:00 amPHL - MDW
1 stop8h 15mDelta
Sun 5/256:00 amMDW - PHL
1 stop7h 52mDelta
Deal found 4/14$197
This Delta deal was found by Cheapflights users on 4/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/213:34 pmPHL - ORD
1 stop6h 46mDelta
Tue 5/273:33 pmORD - PHL
1 stop7h 25mDelta
Deal found 4/15$198
This JetBlue deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1310:16 amPHL - ORD
1 stop9h 20mJetBlue
Tue 8/268:40 amORD - PHL
1 stop8h 10mJetBlue
Deal found 4/14$246
This Cheapflightsfares deal was found by Cheapflights users on 4/15. 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 Cheapflightsfares 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
Fri 5/305:45 pmSTL - PHL
1 stop6h 24mFrontier
Deal found 4/15$258
This Mytrip deal was found by Cheapflights users on 4/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/67:00 amPHL - STL
2 stops12h 41mMultiple Airlines
Thu 5/810:10 amSTL - PHL
3 stops27h 52mMultiple Airlines
Deal found 4/15$261

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 April 15, 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

Fri 5/9

4:12 pm-5:28 pm

Nonstop2h 16m

Chicago Midway

Mon 5/12

12:15 pm-3:17 pm

Nonstop2h 02m

$156

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Fri 5/30

3:39 pm-5:01 pm

Nonstop2h 22m

Chicago O'Hare Intl

Fri 6/6

7:04 pm-10:30 pm

Nonstop2h 26m

$167

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Sat 5/24

8:31 am-9:55 am

Nonstop2h 24m

Chicago O'Hare Intl

Tue 5/27

2:15 pm-5:31 pm

Nonstop2h 16m

$169

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 5/21

4:35 pm-5:45 pm

Nonstop2h 10m

Chicago Midway

Sun 5/25

3:20 pm-6:15 pm

Nonstop1h 55m

$170

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Fri 5/9

5:53 pm-7:21 pm

Nonstop2h 28m

Chicago O'Hare Intl

Tue 5/13

12:41 pm-10:43 pm

1 stop9h 02m

$172

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Mon 5/12

4:00 pm-11:04 pm

2 stops32h 04m

Chicago O'Hare Intl

Wed 5/14

12:41 pm-10:43 pm

1 stop9h 02m

$177

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 5/21

1:37 pm-3:03 pm

Nonstop2h 26m

Chicago O'Hare Intl

Tue 5/27

5:40 pm-8:40 pm

Nonstop2h 00m

$178

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Sat 5/24

6:00 am-1:15 pm

1 stop8h 15m

Chicago Midway

Sun 5/25

6:00 am-2:52 pm

1 stop7h 52m

$197

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 5/21

3:34 pm-9:20 pm

1 stop6h 46m

Chicago O'Hare Intl

Tue 5/27

3:33 pm-11:58 pm

1 stop7h 25m

$198

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 5/13

10:16 am-6:36 pm

1 stop9h 20m

Chicago O'Hare Intl

Tue 8/26

8:40 am-5:50 pm

1 stop8h 10m

$246

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

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 $321). 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 April 15, 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 April 15, 2025.

The most flights from PHL to USIL are scheduled on a Monday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 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 April 15, 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
8.0
Very good
4,279 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.1

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
8.0
Very good
4,279 reviews
Southwest
8.0
Very good
4,279 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.1

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
7,918 reviews
Southwest
8.0
Very good
4,279 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.1

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
8,658 reviews
Southwest
8.0
Very good
4,279 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.1

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
2,927 reviews
Southwest
8.0
Very good
4,279 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.1

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
8.0
Very good
4,279 reviews

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.6

Food

7.1

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 $85 and $89 on Frontier and United Airlines, 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: Republic Airways (100%), ANA (94%), Copa Airlines (93%).

  • 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 $808. The most popular route, (Philadelphia - Chicago O'Hare Intl), can usually be booked for $170.

  • 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 $321). 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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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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$124FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$136Average$503FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$141Average$342FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$165Average$303FlexibilityNo cancel feeOn-time63%
DeltaCheapest$186Average$367FlexibilityNo cancel feeOn-timeN/A

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