$293 Cheap Flights from Denver (DEN) to London (LHR)

View $293 flight on Mon, Apr 27, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)

Today's featured flight deals from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)

Nonstop
Carry-on included
Lower price than typical

Cheap Flights from Denver to London (DEN-LHR)

Prices were available within the past 7 days and start at $293 for one-way flights and $402 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Tue, Mar 10 - Tue, Mar 24
DEN
Denver
LHR
London
$402 Roundtrip, found 11 hours ago
$402
Roundtrip
found 11 hours ago
Select Icelandair flight, departing Tue, Mar 10 from Denver to London, returning Tue, Mar 24, priced at $402 found 11 hours ago
Iberia
Sat, Nov 22 - Wed, Dec 3
DEN
Denver
LHR
London
$480 Roundtrip, found 2 days ago
$480
Roundtrip
found 2 days ago
Select Iberia flight, departing Sat, Nov 22 from Denver to London, returning Wed, Dec 3, priced at $480 found 2 days ago
Delta
Sat, Nov 22 - Wed, Dec 3
DEN
Denver
LHR
London
$485 Roundtrip, found 2 days ago
$485
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Nov 22 from Denver to London, returning Wed, Dec 3, priced at $485 found 2 days ago
American Airlines
Sat, Jan 31 - Tue, Feb 10
DEN
Denver
LHR
London
$488 Roundtrip, found 19 hours ago
$488
Roundtrip
found 19 hours ago
Select American Airlines flight, departing Sat, Jan 31 from Denver to London, returning Tue, Feb 10, priced at $488 found 19 hours ago
Virgin Atlantic
Sat, Jan 31 - Tue, Feb 10
DEN
Denver
LHR
London
$493 Roundtrip, found 19 hours ago
$493
Roundtrip
found 19 hours ago
Select Virgin Atlantic flight, departing Sat, Jan 31 from Denver to London, returning Tue, Feb 10, priced at $493 found 19 hours ago
United
Sat, Jan 31 - Tue, Feb 10
DEN
Denver
LHR
London
$498 Roundtrip, found 19 hours ago
$498
Roundtrip
found 19 hours ago
Select United flight, departing Sat, Jan 31 from Denver to London, returning Tue, Feb 10, priced at $498 found 19 hours ago
Lufthansa
Wed, Apr 1 - Thu, Apr 9
DEN
Denver
LHR
London
$502 Roundtrip, found 10 hours ago
$502
Roundtrip
found 10 hours ago
Select Lufthansa flight, departing Wed, Apr 1 from Denver to London, returning Thu, Apr 9, priced at $502 found 10 hours ago
Air Canada
Wed, Nov 19 - Thu, Nov 27
DEN
Denver
LHR
London
$515 Roundtrip, just found
$515
Roundtrip
just found
Select Air Canada flight, departing Wed, Nov 19 from Denver to London, returning Thu, Nov 27, priced at $515 just found
Brussels Airlines
Tue, Mar 10 - Tue, Mar 24
DEN
Denver
LHR
London
$521 Roundtrip, found 11 hours ago
$521
Roundtrip
found 11 hours ago
Select Brussels Airlines flight, departing Tue, Mar 10 from Denver to London, returning Tue, Mar 24, priced at $521 found 11 hours ago
British Airways
Mon, Nov 24 - Tue, Dec 2
DEN
Denver
LHR
London
$542 Roundtrip, just found
$542
Roundtrip
just found
Select British Airways flight, departing Mon, Nov 24 from Denver to London, returning Tue, Dec 2, priced at $542 just found

Find the cheapest month to fly from Denver (DEN) to London (LHR)

September is typically the cheapest month to fly

From $480 - $690 per traveler.

Alternative airports near London

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

Select flight to Gatwick LGW. Cheapest option available. Average driving time to city center is 52 minutes. Flights from $653
LGW
Gatwick
Cheapest
Average driving time to city center52 min
Flights from $653
Select flight to London City LCY. Closest option available. Average driving time to city center is 21 minutes. Flights from $678
LCY
London City
Closest
Average driving time to city center21 min
Flights from $678

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Heathrow Airport (LHR) cost?
Get a cheap one-way flight from $293 or cheap return flight from $402 from Denver Intl. Airport (DEN) 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 Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
March is the most affordable month to fly from DEN to LHR. Traveling outside of peak seasons is often the key to finding better deals on flights.
Which airlines fly direct from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
If you're departing from Denver Intl. Airport (DEN), you can take a nonstop flight to Heathrow Airport (LHR) with British Airways.
What is the cheapest airline that flies from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
The cheapest airline to offer flights between Denver Intl. Airport (DEN) and Heathrow Airport (LHR) can vary based on when you plan to fly. United Airlines and British Airways are just some well-known options offering competitive fares. Use Expedia's filters to compare airlines in one place and find the right DEN to LHR flight for your budget.
How many flights per day from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
Each day, an average of 2 direct flights take off from Denver Intl. Airport (DEN) to Heathrow Airport (LHR). Select the departure date that fits your schedule best.
What are the most popular departure times for flights from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
Flights between DEN and LHR are their busiest at 5 PM. If you'd like a quieter experience and possibly cheaper fares, choose a departure outside the usual busy windows.
What day of the week has the most flights from DEN to LHR?
If you travel on a Sunday, you'll get the largest range of options for flights from Denver Intl. Airport (DEN) to Heathrow Airport (LHR).
What is the earliest flight from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
The first flight of the day leaving Denver Intl. Airport (DEN) is at around 5:30PM UTC-7. Catch this flight and you'll reach Heathrow Airport (LHR) at approximately 9:35AM UTC+0. The total time in the air is 9h 5m.
How long does it take to fly from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
The average flight time from DEN to LHR is 9 hours and 5 minutes, covering a distance of 4,700 mi.
What airline has the least delays from DEN to LHR?
Consider traveling with United Airlines if you'd like to go straight from Denver Intl. Airport (DEN) to Heathrow Airport (LHR) without any interruptions. This carrier has the strongest track record for punctuality, with an on-time performance of 83%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
To avoid possible delays on the Denver Intl. Airport (DEN) to Heathrow Airport (LHR) route, fly before 3 PM. Later flights are 22% more likely to be canceled.**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.
What airports do you fly into for London from Denver Intl. Airport (DEN)?
If you're flying on a direct flight from Denver Intl. Airport (DEN) to London, Heathrow Airport (LHR) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Heathrow Airport (LHR) last-minute?
Booking your flight from DEN to LHR shortly before your trip is typically more expensive. However, if you're flexible with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book a DEN to LHR flight and hotel package?
Booking a DEN to LHR flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels in one place. Select from our extensive range of accommodations and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Heathrow Airport (LHR)?
Typically, you can cancel or modify your DEN to LHR flight. However, additional charges may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you need more details, go to our Customer Service portal.

Travel information

Origin airport
Denver Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic, WestJet
Roundtrip price
$402
Distance
4658 mi
Average flight time
15 hours 7 mins

Book with confidence

Denver to London Flights

The cheapest times to fly from Denver 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 Denver to London are during the month of March. You can find some of the cheapest flights from Denver to London with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to London

Sunday is one of the best days to book for cheap flights from Denver 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 Denver 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 Denver to London in 2025. You can also book with separate airlines for your outbound and return journeys, from $293 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 Denver 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 Denver 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.

 

Denver to London Flights

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*Available to One Key members.