$463 Cheap Flights from Champaign (CMI) to London (LHR)

View $463 flight on Tue, Nov 25, 2025Opens in a new window

Popular airlines from Champaign, IL (CMI-University Of Illinois Urbana-Champaign Williard) to Heathrow Airport (LHR)

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Cheap Flights from Champaign to London (CMI-LHR)

Prices were available within the past 7 days and start at $463 for one-way flights and $751 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Feb 3 - Tue, Feb 10
CMI
Champaign
LHR
London
$751 Roundtrip, found 3 days ago
$751
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, Feb 3 from Champaign to London, returning Tue, Feb 10, priced at $751 found 3 days ago
American Airlines
Wed, Mar 18 - Wed, Mar 25
CMI
Champaign
LHR
London
$752 Roundtrip, found 5 days ago
$752
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Mar 18 from Champaign to London, returning Wed, Mar 25, priced at $752 found 5 days ago
American Airlines
Wed, Mar 18 - Wed, Mar 25
CMI
Champaign
LHR
London
$752 Roundtrip, found 5 days ago
$752
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Mar 18 from Champaign to London, returning Wed, Mar 25, priced at $752 found 5 days ago
American Airlines
Wed, Mar 18 - Wed, Mar 25
CMI
Champaign
LHR
London
$756 Roundtrip, found 5 days ago
$756
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Mar 18 from Champaign to London, returning Wed, Mar 25, priced at $756 found 5 days ago
American Airlines
Wed, Mar 18 - Wed, Mar 25
CMI
Champaign
LHR
London
$758 Roundtrip, found 5 days ago
$758
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Mar 18 from Champaign to London, returning Wed, Mar 25, priced at $758 found 5 days ago
British Airways
Tue, Nov 11 - Tue, Nov 18
CMI
Champaign
LHR
London
$768 Roundtrip, found 1 day ago
$768
Roundtrip
found 1 day ago
Select British Airways flight, departing Tue, Nov 11 from Champaign to London, returning Tue, Nov 18, priced at $768 found 1 day ago
British Airways
Tue, Nov 11 - Tue, Nov 18
CMI
Champaign
LHR
London
$768 Roundtrip, found 1 day ago
$768
Roundtrip
found 1 day ago
Select British Airways flight, departing Tue, Nov 11 from Champaign to London, returning Tue, Nov 18, priced at $768 found 1 day ago
American Airlines
Wed, Mar 18 - Wed, Mar 25
CMI
Champaign
LHR
London
$777 Roundtrip, found 5 days ago
$777
Roundtrip
found 5 days ago
Select American Airlines flight, departing Wed, Mar 18 from Champaign to London, returning Wed, Mar 25, priced at $777 found 5 days ago
British Airways
Tue, Oct 21 - Fri, Oct 31
CMI
Champaign
LHR
London
$778 Roundtrip, found 4 days ago
$778
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Oct 21 from Champaign to London, returning Fri, Oct 31, priced at $778 found 4 days ago
British Airways
Mon, Mar 16 - Tue, Mar 24
CMI
Champaign
LHR
London
$780 Roundtrip, found 5 days ago
$780
Roundtrip
found 5 days ago
Select British Airways flight, departing Mon, Mar 16 from Champaign to London, returning Tue, Mar 24, priced at $780 found 5 days ago

Alternative airports near London

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

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city center is 28 minutes. Flights from $1,719
LHR
Heathrow
Cheapest
Average driving time to city center28 min
Flights from $1,719

Frequently asked questions

How much does a flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Heathrow Airport (LHR) cost?
Secure a cheap one-way flight from $463 or cheap return flight from $751 from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Heathrow Airport (LHR) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Heathrow Airport (LHR)?
February is the most affordable month to fly from CMI to LHR. Timing your trip outside of the busy season is often the key to scoring lower fares.
What is the cheapest airline that flies from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Heathrow Airport (LHR)?
To find the cheapest airline that'll fly you from CMI to LHR, use Expedia's filter tool. Tailor your search based on your travel style, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Heathrow Airport (LHR)?
You'll have to catch a flight with a layover if you're traveling from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Heathrow Airport (LHR). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from CMI to LHR?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the time of year, airline 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 Heathrow Airport (LHR)?
To touch down at Heathrow Airport (LHR) on time, opt for a flight that leaves University Of Illinois Urbana-Champaign Williard Airport (CMI) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Heathrow Airport (LHR) last-minute?
Last-minute bookings from CMI to LHR are usually more expensive. To secure the lowest rates, start looking for flights early. That said, if you're flexible with your travel dates, you may score a cheap fare just before your departure.
Is it cheaper to book a CMI to LHR flight and hotel package?
Compared with arranging hotels and flights separately, booking a CMI to LHR flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place will take the stress out of travel planning. Just pick your flights and choose from our wide range of hotels, then tailor your trip with other add-ons like activities and car rentals.
Can I cancel or change the date of my flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to Heathrow Airport (LHR)?
In most cases, you're able to cancel or reschedule your CMI to LHR flight. However, additional charges may apply, especially if you booked more than 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want more information, visit our Customer Service portal.

Travel information

Travel information

Origin airport
University Of Illinois Urbana-Champaign Williard
Destination airport
Heathrow
Airlines serving
American Airlines, British Airways
Roundtrip price
$750
Distance
4046 mi

Book with confidence

Book with confidence

Champaign to London Flights

The cheapest times to fly from Champaign to London

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 London are during the month of February. You can find some of the cheapest flights from Champaign to London with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Champaign to London

Sunday is one of the best days to book for cheap flights from Champaign to London: 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 London

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 London in 2025. You can also book with separate airlines for your outbound and return journeys, from $463 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 London 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 London 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 London Flights

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*Available to One Key members.