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$83+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — ORD
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$166
(Kiwi.com)

One-way from

$83
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$212

Good round-trip deal

$218 or less

Good one-way deal

$134 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. 27% potential increase in price ($83 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 May 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 May 1, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/35:45 amPHL - ORD
Nonstop2h 30mMultiple Airlines
Wed 8/68:00 amORD - PHL
1 stop10h 01mMultiple Airlines
Deal found 4/30$166
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/105:45 amPHL - ORD
Nonstop2h 30mFrontier
Sun 7/138:24 amORD - PHL
Nonstop2h 20mFrontier
Deal found 4/30$171
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/306:39 pmPHL - MDW
Nonstop2h 16mFrontier
Tue 6/34:54 pmMDW - PHL
1 stop6h 05mFrontier
Deal found 4/30$176
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/35:00 amPHL - ORD
Nonstop2h 26mAmerican Airlines
Tue 6/105:00 amORD - PHL
Nonstop1h 56mAmerican Airlines
Deal found 4/30$177
This Southwest deal was found by Cheapflights users on 4/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/155:55 amPHL - MDW
Nonstop2h 05mSouthwest
Tue 7/228:30 pmMDW - PHL
Nonstop1h 55mSouthwest
Deal found 4/30$177
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:30 amPHL - ORD
Nonstop2h 24mUnited Airlines
Sat 5/246:13 pmORD - PHL
Nonstop2h 15mUnited Airlines
Deal found 4/29$180
This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/307:12 pmPHL - ORD
1 stop29h 17mSpirit Airlines
Tue 6/312:41 pmORD - PHL
3 stops32h 55mSpirit Airlines
Deal found 4/30$186
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/24:05 pmPHL - ORD
1 stop6h 19mDelta
Thu 7/35:05 pmORD - PHL
1 stop5h 05mDelta
Deal found 4/30$197
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/14:05 pmPHL - MDW
1 stop6h 40mDelta
Fri 7/46:20 pmMDW - PHL
1 stop3h 50mDelta
Deal found 4/29$197
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/227:06 amPHL - RFD
2 stops9h 20mMultiple Airlines
Thu 5/294:14 pmRFD - PHL
1 stop21h 48mMultiple Airlines
Deal found 4/29$246
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/126:10 amPHL - STL
1 stop13h 22mSpirit Airlines
Fri 8/158:44 amSTL - PHL
1 stop7h 26mSpirit Airlines
Deal found 4/30$288
This Southwest deal was found by Cheapflights users on 4/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/115:30 amPHL - ORD
2 stops10h 30mSouthwest
Tue 6/177:30 amORD - PHL
1 stop8h 25mSouthwest
Deal found 4/30$296

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 May 1, 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 - ORD

PHLORD

Philadelphia

Sun 8/3

5:45 am-7:15 am

Nonstop2h 30m

Chicago O'Hare Intl

Wed 8/6

8:00 am-7:01 pm

1 stop10h 01m

$166

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Thu 7/10

5:45 am-7:15 am

Nonstop2h 30m

Chicago O'Hare Intl

Sun 7/13

8:24 am-11:44 am

Nonstop2h 20m

$171

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Fri 5/30

6:39 pm-7:55 pm

Nonstop2h 16m

Chicago Midway

Tue 6/3

4:54 pm-11:59 pm

1 stop6h 05m

$176

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Tue 6/3

5:00 am-6:26 am

Nonstop2h 26m

Chicago O'Hare Intl

Tue 6/10

5:00 am-7:56 am

Nonstop1h 56m

$177

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Tue 7/15

5:55 am-7:00 am

Nonstop2h 05m

Chicago Midway

Tue 7/22

8:30 pm-11:25 pm

Nonstop1h 55m

$177

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 5/21

6:30 am-7:54 am

Nonstop2h 24m

Chicago O'Hare Intl

Sat 5/24

6:13 pm-9:28 pm

Nonstop2h 15m

$180

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Fri 5/30

7:12 pm-11:29 pm

1 stop29h 17m

Chicago O'Hare Intl

Tue 6/3

12:41 pm-10:36 pm

3 stops32h 55m

$186

PhiladelphiaChicago

PHL - ORD

PHLORD

Philadelphia

Wed 7/2

4:05 pm-9:24 pm

1 stop6h 19m

Chicago O'Hare Intl

Sat 7/5

7:10 am-4:12 pm

1 stop8h 02m

$197

PhiladelphiaChicago

PHL - MDW

PHLMDW

Philadelphia

Tue 7/1

4:05 pm-9:45 pm

1 stop6h 40m

Chicago Midway

Fri 7/4

6:20 pm-11:10 pm

1 stop3h 50m

$197

PhiladelphiaChicago

PHL - RFD

PHLRFD

Philadelphia

Thu 5/29

7:06 am-3:24 pm

2 stops9h 18m

Chicago Greater Rockford

Sun 6/1

4:16 pm-3:02 pm

1 stop21h 46m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 59 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 May 1, 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 May 1, 2025.

The most flights from PHL to USIL are scheduled on a Thursday (46 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 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 May 1, 2025.
See what other customers who have flown with Alaska Airlines, Southwest 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.
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.1

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
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.1

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
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.1

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
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.1

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.1

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
2,922 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Overall

8.0

Entertainment

7.1

Comfort

7.9

Boarding

8.1

Crew

8.5

Food

7.1

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 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 $83. Users have also found prices from $84 and $89 on Spirit Airlines and American 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 (90%).

  • What are the cheapest flights from Philadelphia to Illinois?

    The cheapest flight price from Philadelphia to Illinois is $84. On average you can expect to pay $853. The most popular route, (Philadelphia - Chicago O'Hare Intl), can usually be booked for $151.

  • 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$49Average$124FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$141Average$478FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$143Average$343FlexibilityNo cancel feeOn-time69%
DeltaCheapest$157Average$338FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$167Average$298FlexibilityNo cancel feeOn-time63%

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