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$55+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$198
(Mytrip)

One-way from

$55
(Frontier)

Popular in

February

Cheapest in

September

Average price

$332

Good round-trip deal

$328 or less

Good one-way deal

$192 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. 6% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This Delta deal was found by Cheapflights users on 2/19. 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 4/810:29 amPHL - MDW
1 stop6h 43mDelta
Tue 4/1512:48 pmMDW - PHL
1 stop4h 32mDelta
Deal found 2/19$197
This Mytrip deal was found by Cheapflights users on 2/20. 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 4/36:34 pmPHL - ORD
1 stop15h 10mSpirit Airlines
Sun 4/610:40 amORD - PHL
1 stop21h 18mSpirit Airlines
Deal found 2/20$198
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
Wed 4/21:21 pmPHL - MDW
1 stop7h 14mFrontier
Sun 4/138:00 amMDW - PHL
Nonstop2h 02mFrontier
Deal found 2/20$200
This Mytrip deal was found by Cheapflights users on 2/20. 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 2/286:15 pmPHL - ORD
1 stop27h 41mMultiple Airlines
Tue 3/45:15 amORD - PHL
2 stops27h 58mMultiple Airlines
Deal found 2/20$205
This Southwest deal was found by Cheapflights users on 2/19. 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 4/26:25 amPHL - MDW
Nonstop2h 15mSouthwest
Thu 4/38:15 amMDW - PHL
Nonstop1h 55mSouthwest
Deal found 2/19$207
This Delta deal was found by Cheapflights users on 2/20. 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 4/1612:28 pmPHL - ORD
1 stop4h 40mDelta
Sun 4/206:35 amORD - PHL
1 stop6h 18mDelta
Deal found 2/20$227
This American Airlines deal was found by Cheapflights users on 2/20. 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 4/17:06 pmPHL - ORD
1 stop4h 10mAmerican Airlines
Tue 4/87:00 pmORD - PHL
Nonstop2h 06mAmerican Airlines
Deal found 2/20$232
This Delta deal was found by Cheapflights users on 2/19. 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 7/114:00 pmPHL - MLI
1 stop7h 29mDelta
Tue 7/155:55 amMLI - PHL
1 stop6h 39mDelta
Deal found 2/19$249
This Mytrip deal was found by Cheapflights users on 2/20. 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 3/107:05 amPHL - PIA
1 stop8h 17mMultiple Airlines
Thu 3/136:25 pmPIA - PHL
1 stop13h 33mMultiple Airlines
Deal found 2/20$252
This JetBlue Airways deal was found by Cheapflights users on 2/20. 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.
Sat 6/76:00 amPHL - ORD
1 stop5h 03mJetBlue
Wed 6/118:50 amORD - PHL
1 stop6h 48mJetBlue
Deal found 2/20$264
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/176:45 pmPHL - ORD
Nonstop2h 33mUnited Airlines
Thu 3/209:30 pmORD - PHL
Nonstop2h 00mUnited Airlines
Deal found 2/20$268
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Fri 3/711:50 amPHL - MLI
1 stop5h 49mUnited Airlines
Tue 3/113:50 pmMLI - PHL
1 stop4h 30mUnited Airlines
Deal found 2/20$270

Find flights from Philadelphia to Illinois within your budget

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 February 20, 2025.

Fly from

Philadelphia

Fly to

Illinois

Route

Depart

Return

Price

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 4/3

6:34 pm-8:44 am

1 stop15h 10m

Chicago O'Hare Intl

Sun 4/6

10:40 am-8:58 am

1 stop21h 18m

$198

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 4/2

1:21 pm-7:35 pm

1 stop7h 14m

Chicago Midway

Sun 4/13

8:00 am-11:02 am

Nonstop2h 02m

$200

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 4/1

9:15 pm-10:47 pm

Nonstop2h 32m

Chicago O'Hare Intl

Thu 4/3

4:25 pm-7:22 pm

Nonstop1h 57m

$207

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Tue 4/8

8:05 am-1:40 pm

1 stop6h 35m

Chicago Midway

Tue 4/8

6:25 pm-9:20 pm

Nonstop1h 55m

$207

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 4/16

12:28 pm-4:08 pm

1 stop4h 40m

Chicago O'Hare Intl

Sun 4/20

6:35 am-1:53 pm

1 stop6h 18m

$227

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 3/6

10:03 am-12:16 pm

2 stops27h 13m

Chicago O'Hare Intl

Sun 3/9

5:10 am-8:58 am

1 stop26h 48m

$244

PhiladelphiaPeoria

PHL - PIA

PHLPIA

Philadelphia

Mon 3/10

7:05 am-2:22 pm

1 stop8h 17m

Greater Peoria

Thu 3/13

6:25 pm-8:58 am

1 stop13h 33m

$252

PhiladelphiaMoline

PHL - MLI

PHLMLI

Philadelphia

Sat 3/8

11:30 am-4:25 pm

1 stop5h 55m

Moline Quad-City

Wed 3/12

5:03 pm-12:45 am

1 stop6h 42m

$259

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Wed 4/2

12:28 pm-6:02 pm

1 stop6h 34m

Chicago Midway

Fri 4/4

4:59 pm-12:46 am

1 stop6h 47m

$262

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Sat 6/7

6:00 am-10:03 am

1 stop5h 03m

Chicago O'Hare Intl

Wed 6/11

8:50 am-4:38 pm

1 stop6h 48m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 60 results
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2
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6

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.

Travel insights for flights from Philadelphia to Illinois

Get recent, data-driven insights about flights from Philadelphia to Illinois including ideal travel times, pricing trends, and more.

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 February 20, 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 February 20, 2025.

The most flights from PHL to USIL are scheduled on a Thursday (38 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 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 February 20, 2025.
See what other customers who have flown with Southwest, Alaska Airlines and Delta 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
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,692 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Overall

8.1

Crew

8.7

Food

7.1

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 Frontier. According to our data, you can fly for as low as $55. Users have also found prices from $64 and $99 on Spirit Airlines and Delta, 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: SWISS (100%), Spirit Airlines (100%), Copa Airlines (97%).

  • What are the cheapest flights from Philadelphia to Illinois?

    The cheapest flight price from Philadelphia to Illinois is $109. On average you can expect to pay $1,016. The most popular route, (Philadelphia - Chicago O'Hare Intl), can usually be booked for $101.

  • 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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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$48Average$122FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$131Average$498FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$138Average$339FlexibilityNo cancel feeOn-time69%
DeltaCheapest$157Average$306FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$158Average$272FlexibilityNo cancel feeOn-time63%
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