$421 Cheap Flights from London (LHR) to Denver (DEN)

View $421 flight on Wed, Sep 24, 2025Opens in a new window

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

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Find available prices by choosing your travel dates.

Cheap Flights from London to Denver (LHR-DEN)

Prices were available within the past 7 days and start at $421 for one-way flights and $602 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Fri, Sep 26 - Tue, Sep 30
LHR
London
DEN
Denver
$602 Roundtrip, found 6 days ago
$602
Roundtrip
found 6 days ago
Select Icelandair flight, departing Fri, Sep 26 from London to Denver, returning Tue, Sep 30, priced at $602 found 6 days ago
Icelandair
Tue, Sep 16 - Tue, Sep 30
LHR
London
DEN
Denver
$604 Roundtrip, found 2 days ago
$604
Roundtrip
found 2 days ago
Select Icelandair flight, departing Tue, Sep 16 from London to Denver, returning Tue, Sep 30, priced at $604 found 2 days ago
Swiss International Air Lines
Thu, Sep 11 - Mon, Sep 22
LHR
London
DEN
Denver
$643 Roundtrip, found 5 days ago
$643
Roundtrip
found 5 days ago
Select Swiss International Air Lines flight, departing Thu, Sep 11 from London to Denver, returning Mon, Sep 22, priced at $643 found 5 days ago
Lufthansa
Fri, Aug 29 - Wed, Sep 17
LHR
London
DEN
Denver
$646 Roundtrip, found 22 hours ago
$646
Roundtrip
found 22 hours ago
Select Lufthansa flight, departing Fri, Aug 29 from London to Denver, returning Wed, Sep 17, priced at $646 found 22 hours ago
Brussels Airlines
Fri, Sep 26 - Sun, Sep 28
LHR
London
DEN
Denver
$660 Roundtrip, found 1 day ago
$660
Roundtrip
found 1 day ago
Select Brussels Airlines flight, departing Fri, Sep 26 from London to Denver, returning Sun, Sep 28, priced at $660 found 1 day ago
United
Wed, May 14 - Sun, May 18
LHR
London
DEN
Denver
$665 Roundtrip, found 2 days ago
$665
Roundtrip
found 2 days ago
Select United flight, departing Wed, May 14 from London to Denver, returning Sun, May 18, priced at $665 found 2 days ago
American Airlines
Mon, May 12 - Sun, May 18
LHR
London
DEN
Denver
$673 Roundtrip, found 20 hours ago
$673
Roundtrip
found 20 hours ago
Select American Airlines flight, departing Mon, May 12 from London to Denver, returning Sun, May 18, priced at $673 found 20 hours ago
Austrian Airlines
Fri, Aug 29 - Wed, Sep 17
LHR
London
DEN
Denver
$678 Roundtrip, found 22 hours ago
$678
Roundtrip
found 22 hours ago
Select Austrian Airlines flight, departing Fri, Aug 29 from London to Denver, returning Wed, Sep 17, priced at $678 found 22 hours ago
British Airways
Mon, Apr 28 - Sun, May 4
LHR
London
DEN
Denver
$687 Roundtrip, found 4 days ago
$687
Roundtrip
found 4 days ago
Select British Airways flight, departing Mon, Apr 28 from London to Denver, returning Sun, May 4, priced at $687 found 4 days ago
Delta
Tue, Sep 2 - Mon, Sep 15
LHR
London
DEN
Denver
$690 Roundtrip, found 2 days ago
$690
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Sep 2 from London to Denver, returning Mon, Sep 15, priced at $690 found 2 days ago

Frequently asked questions

How much does a flight from Heathrow Airport (LHR) to Denver Intl. Airport (DEN) cost?
Cheap return fares from Heathrow Airport (LHR) to Denver Intl. Airport (DEN) start from $675. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Lufthansa flight leaving LHR on May 15 2025 and touching down at DEN. The price was last updated on April 22 2025 and has not changed since.
What is the cheapest month to fly from LHR to DEN?
The cheapest flights from LHR to DEN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Heathrow Airport (LHR) to Denver Intl. Airport (DEN)?
Jump on a nonstop flight with United Airlines and journey straight from Heathrow Airport (LHR) to Denver Intl. Airport (DEN).
What is the cheapest airline that flies from LHR to DEN?
With tickets starting at $1648 for a one-way journey from LHR to DEN, Lufthansa is currently the cheapest airline for this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from LHR on July 1 2025. Prices were last updated on April 22 2025 and have not changed since.
How many flights per day from Heathrow Airport (LHR) to Denver Intl. Airport (DEN)?
Every day, an average of 2 nonstop flights operate from Heathrow Airport (LHR) to Denver Intl. Airport (DEN). Select the departure time that best suits your travel plans.
What are the most popular departure times for flights from Heathrow Airport (LHR) to Denver Intl. Airport (DEN)?
More travelers fly between LHR and DEN at 11 AM than at any other time of day. Looking for a quieter experience? Consider flying outside peak hours and you could save on your fare as well.
What day of the week has the most flights from LHR to DEN?
Thursday has the most flights from Heathrow Airport (LHR) to Denver Intl. Airport (DEN). Consider traveling on this day and you’ll have a greater chance of finding a schedule that works for you.
What is the earliest flight from Heathrow Airport (LHR) to Denver Intl. Airport (DEN)?
Heathrow Airport (LHR)’s first flight to Denver Intl. Airport (DEN) takes off at approximately 11:35AM UTC+0. With a total travel time of 9h 50m, you’ll land at around 2:25PM UTC-7.
How long does it take to fly from Heathrow Airport (LHR) to Denver Intl. Airport (DEN)?
It usually takes 9 hours and 53 minutes to travel the 4,700 mi from LHR to DEN.
What airline has the least delays from LHR to DEN?
Consider booking with United Airlines if you’d like to fly straight from Heathrow Airport (LHR) to Denver Intl. Airport (DEN) without any delays. This carrier has the strongest track record for punctuality, with an on-time performance of 83%. Want to be notified if anything changes? You can check your flight status using the Expedia App.
What is the best time to fly from Heathrow Airport (LHR) to Denver Intl. Airport (DEN)?
Opt for a flight from Heathrow Airport (LHR) to Denver Intl. Airport (DEN) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures are on average 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 Denver from Heathrow Airport (LHR)?
Browse your flight options from Heathrow Airport (LHR) to Denver Intl. Airport (DEN). This is the only Denver airport you can arrive at if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Heathrow Airport (LHR) to Denver Intl. Airport (DEN) last-minute?
Last-minute bookings from LHR to DEN are usually more expensive. To lock in the cheapest rates, start searching for flights well in advance. That being said, if your travel plans are flexible, you may land a cheap ticket just before your departure.
Is it cheaper to book a LHR to DEN flight and hotel package?
Opting for a LHR to DEN flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our impressive range of hotels 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 Heathrow Airport (LHR) to Denver Intl. Airport (DEN)?
Typically, you can modify or cancel your LHR to DEN flight. However, there may be additional fees, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline’s fees and guidelines on flight changes, or if you want more information, head to our Customer Service portal.
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