$348 Cheap Flights from Denver (DEN) to London (LGW)

View $348 flight on Tue, Oct 14, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Gatwick Airport (LGW)

Cheap Flights from Denver to London (DEN-LGW)

Prices were available within the past 7 days and start at $348 for one-way flights and $445 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Fri, Dec 5 - Tue, Dec 16
DEN
Denver
LGW
London
$445 Roundtrip, found 1 day ago
$445
Roundtrip
found 1 day ago
Select Icelandair flight, departing Fri, Dec 5 from Denver to London, returning Tue, Dec 16, priced at $445 found 1 day ago
Icelandair
Sat, Mar 21 - Sun, Mar 29
DEN
Denver
LGW
London
$471 Roundtrip, found 3 days ago
$471
Roundtrip
found 3 days ago
Select Icelandair flight, departing Sat, Mar 21 from Denver to London, returning Sun, Mar 29, priced at $471 found 3 days ago
Icelandair
Thu, Dec 4 - Thu, Dec 11
DEN
Denver
LGW
London
$517 Roundtrip, found 1 hour ago
$517
Roundtrip
found 1 hour ago
Select Icelandair flight, departing Thu, Dec 4 from Denver to London, returning Thu, Dec 11, priced at $517 found 1 hour ago
Icelandair
Tue, Oct 14 - Fri, Oct 31
DEN
Denver
LGW
London
$533 Roundtrip, just found
$533
Roundtrip
just found
Select Icelandair flight, departing Tue, Oct 14 from Denver to London, returning Fri, Oct 31, priced at $533 just found
Icelandair
Tue, Oct 14 - Thu, Oct 30
DEN
Denver
LGW
London
$534 Roundtrip, found 1 day ago
$534
Roundtrip
found 1 day ago
Select Icelandair flight, departing Tue, Oct 14 from Denver to London, returning Thu, Oct 30, priced at $534 found 1 day ago
Icelandair
Sun, Oct 19 - Mon, Oct 27
DEN
Denver
LGW
London
$535 Roundtrip, found 6 days ago
$535
Roundtrip
found 6 days ago
Select Icelandair flight, departing Sun, Oct 19 from Denver to London, returning Mon, Oct 27, priced at $535 found 6 days ago
American Airlines
Tue, Oct 14 - Wed, Oct 29
DEN
Denver
LGW
London
$563 Roundtrip, found 2 hours ago
$563
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Tue, Oct 14 from Denver to London, returning Wed, Oct 29, priced at $563 found 2 hours ago
Swiss International Air Lines
Tue, Feb 3 - Tue, Feb 10
DEN
Denver
LGW
London
$589 Roundtrip, found 22 hours ago
$589
Roundtrip
found 22 hours ago
Select Swiss International Air Lines flight, departing Tue, Feb 3 from Denver to London, returning Tue, Feb 10, priced at $589 found 22 hours ago
Iberia
Sun, Mar 1 - Wed, Mar 18
DEN
Denver
LGW
London
$639 Roundtrip, found 5 days ago
$639
Roundtrip
found 5 days ago
Select Iberia flight, departing Sun, Mar 1 from Denver to London, returning Wed, Mar 18, priced at $639 found 5 days ago
British Airways
Mon, Mar 9 - Mon, Mar 16
DEN
Denver
LGW
London
$661 Roundtrip, found 1 day ago
$661
Roundtrip
found 1 day ago
Select British Airways flight, departing Mon, Mar 9 from Denver to London, returning Mon, Mar 16, priced at $661 found 1 day 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 $629
LHR
Heathrow
Cheapest
Average driving time to city center28 min
Flights from $629
Flights from Denver (DEN) to London (LGW)
Origin airport
Denver Intl.
Destination airport
Gatwick
Airlines serving
Air Europa, American Airlines, British Airways, Delta, Iberia, Icelandair, JetBlue Airways, Royal Air Maroc, Swiss International Air Lines, TAP Portugal, Turkish Airlines, Virgin Atlantic
Roundtrip price
$445
Distance
4681 mi

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 December. 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 $348 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.

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Gatwick Airport (LGW) cost?
Snag a cheap one-way flight from $348 or cheap return flight from $445 from Denver Intl. Airport (DEN) to Gatwick Airport (LGW) 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 Denver Intl. Airport (DEN) to Gatwick Airport (LGW)?
The cheapest month to fly from DEN to LGW is December, when there's less demand. Off-peak season is often when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Denver Intl. Airport (DEN) to Gatwick Airport (LGW)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest DEN to LGW flight.
How many flights per day from Denver Intl. Airport (DEN) to Gatwick Airport (LGW)?
Nonstop flights from Denver Intl. Airport (DEN) to Gatwick Airport (LGW) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DEN to LGW?
Friday is typically the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on a range of factors, including the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Denver Intl. Airport (DEN) to Gatwick Airport (LGW)?
To avoid possible delays on the Denver Intl. Airport (DEN) to Gatwick Airport (LGW) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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)?
Heathrow Airport (LHR) is the only airport in London with direct flights from Denver Intl. Airport (DEN). Check out your options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Gatwick Airport (LGW) last-minute?
Booking your flight from DEN to LGW right before your getaway is typically more expensive. However, if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a DEN to LGW flight and hotel package?
You can save money by securing a DEN to LGW flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After choosing your preferred accommodations and flights, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Gatwick Airport (LGW)?
It's usually possible to cancel or reschedule your DEN to LGW flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.