$354 Cheap Flights from Champaign (CMI) to Philadelphia (PHL)

View $354 flight on Tue, Oct 14, 2025Opens in a new window

Popular airlines from Champaign, IL (CMI-University Of Illinois Urbana-Champaign Williard) to Philadelphia Intl. Airport (PHL)

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Cheap Flights from Champaign to Philadelphia (CMI-PHL)

Prices were available within the past 7 days and start at $354 for one-way flights and $370 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Feb 3 - Sat, Feb 7
CMI
Champaign
PHL
Philadelphia
$370 Roundtrip, found 17 hours ago
$370
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Tue, Feb 3 from Champaign to Philadelphia, returning Sat, Feb 7, priced at $370 found 17 hours ago
American Airlines
Wed, Dec 31 - Wed, Jan 7
CMI
Champaign
PHL
Philadelphia
$429 Roundtrip, found 2 days ago
$429
Roundtrip
found 2 days ago
Select American Airlines flight, departing Wed, Dec 31 from Champaign to Philadelphia, returning Wed, Jan 7, priced at $429 found 2 days ago
American Airlines
Sat, Nov 1 - Sat, Nov 8
CMI
Champaign
PHL
Philadelphia
$440 Roundtrip, found 13 hours ago
$440
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Sat, Nov 1 from Champaign to Philadelphia, returning Sat, Nov 8, priced at $440 found 13 hours ago
American Airlines
Fri, Oct 24 - Mon, Oct 27
CMI
Champaign
PHL
Philadelphia
$450 Roundtrip, found 1 day ago
$450
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 24 from Champaign to Philadelphia, returning Mon, Oct 27, priced at $450 found 1 day ago
American Airlines
Thu, Dec 25 - Sat, Dec 27
CMI
Champaign
PHL
Philadelphia
$460 Roundtrip, found 6 days ago
$460
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Dec 25 from Champaign to Philadelphia, returning Sat, Dec 27, priced at $460 found 6 days ago
American Airlines
Fri, Jan 2 - Sat, Jan 3
CMI
Champaign
PHL
Philadelphia
$469 Roundtrip, found 3 days ago
$469
Roundtrip
found 3 days ago
Select American Airlines flight, departing Fri, Jan 2 from Champaign to Philadelphia, returning Sat, Jan 3, priced at $469 found 3 days ago
American Airlines
Thu, Dec 25 - Sat, Dec 27
CMI
Champaign
PHL
Philadelphia
$479 Roundtrip, found 6 days ago
$479
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Dec 25 from Champaign to Philadelphia, returning Sat, Dec 27, priced at $479 found 6 days ago
American Airlines
Sat, Nov 1 - Fri, Nov 7
CMI
Champaign
PHL
Philadelphia
$480 Roundtrip, found 13 hours ago
$480
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Sat, Nov 1 from Champaign to Philadelphia, returning Fri, Nov 7, priced at $480 found 13 hours ago
American Airlines
Wed, Oct 8 - Wed, Oct 15
CMI
Champaign
PHL
Philadelphia
$488 Roundtrip, found 1 day ago
$488
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Oct 8 from Champaign to Philadelphia, returning Wed, Oct 15, priced at $488 found 1 day ago
American Airlines
Fri, Oct 24 - Mon, Oct 27
CMI
Champaign
PHL
Philadelphia
$495 Roundtrip, found 1 day ago
$495
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Oct 24 from Champaign to Philadelphia, returning Mon, Oct 27, priced at $495 found 1 day ago

Alternative airports near Philadelphia

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Philadelphia Intl. PHL. Cheapest and Closest option available. Average driving time to city center is 17 minutes. Flights from $500
PHL
Philadelphia Intl.
CheapestClosest
Average driving time to city center17 min
Flights from $500

Frequently asked questions

How much does a flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL) cost?
Secure a cheap one-way flight from $354 or cheap return flight from $370 from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL)?
The cheapest month to fly from CMI to PHL is February, when demand is low. Off-peak months are typically when airlines offer lower prices between these airports.
What is the cheapest airline that flies from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL)?
To find the cheapest airline flying from CMI to PHL, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL)?
Nonstop flights from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from CMI to PHL?
Usually you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL)?
Opt for a flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL) that takes off before 3 PM to reduce the risk of cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL) last-minute?
Holding off until just before your trip to book a ticket from CMI to PHL generally means paying more. While you might find some last-minute offers, they're not always guaranteed. Allow some flexibility in your schedule to boost your chances of scoring a bargain.
Is it cheaper to book a CMI to PHL flight and hotel package?
Opting for a CMI to PHL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our extensive range of stays and then add activities, car rentals and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Philadelphia Intl. Airport (PHL)?
If you reserved your CMI to PHL flight in the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

Travel information

Travel information

Origin airport
University Of Illinois Urbana-Champaign Williard
Destination airport
Philadelphia Intl.
Airlines serving
American Airlines
Roundtrip price
$370
Distance
689 mi

Book with confidence

Book with confidence

Champaign to Philadelphia Flights

The cheapest times to fly from Champaign to Philadelphia

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Champaign to Philadelphia are during the month of February. You can find some of the cheapest flights from Champaign to Philadelphia with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Champaign to Philadelphia

Sunday is one of the best days to book for cheap flights from Champaign to Philadelphia: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Champaign to Philadelphia

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Champaign to Philadelphia in 2025. You can also book with separate airlines for your outbound and return journeys, from $354 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Champaign to Philadelphia flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Champaign to Philadelphia airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Champaign to Philadelphia Flights

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*Available to One Key members.