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

View AU$477 flight on Sun, 12 Oct. 2025Opens in a new window

Popular airlines from Denver International Airport (DEN) to Heathrow Airport (LHR)

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

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Wed, 10 Sep. - Wed, 17 Sep.
DEN
Denver
LHR
London
AU$734 Return, found 5 days ago
AU$734
Return
found 5 days ago
Select Aer Lingus flight, departing Wed, 10 Sep. from Denver to London, returning Wed, 17 Sep., priced at AU$734 found 5 days ago
Air Canada
Mon, 4 Aug. - Tue, 19 Aug.
DEN
Denver
LHR
London
AU$756 Return, found 3 days ago
AU$756
Return
found 3 days ago
Select Air Canada flight, departing Mon, 4 Aug. from Denver to London, returning Tue, 19 Aug., priced at AU$756 found 3 days ago
United
Tue, 14 Oct. - Thu, 30 Oct.
DEN
Denver
LHR
London
AU$761 Return, found 3 days ago
AU$761
Return
found 3 days ago
Select United flight, departing Tue, 14 Oct. from Denver to London, returning Thu, 30 Oct., priced at AU$761 found 3 days ago
Air Canada
Mon, 4 Aug. - Tue, 19 Aug.
DEN
Denver
LHR
London
AU$766 Return, found 3 days ago
AU$766
Return
found 3 days ago
Select Air Canada flight, departing Mon, 4 Aug. from Denver to London, returning Tue, 19 Aug., priced at AU$766 found 3 days ago
United
Mon, 4 Aug. - Tue, 19 Aug.
DEN
Denver
LHR
London
AU$783 Return, found 3 days ago
AU$783
Return
found 3 days ago
Select United flight, departing Mon, 4 Aug. from Denver to London, returning Tue, 19 Aug., priced at AU$783 found 3 days ago
Air Canada
Tue, 14 Oct. - Thu, 30 Oct.
DEN
Denver
LHR
London
AU$783 Return, found 3 days ago
AU$783
Return
found 3 days ago
Select Air Canada flight, departing Tue, 14 Oct. from Denver to London, returning Thu, 30 Oct., priced at AU$783 found 3 days ago
Icelandair
Thu, 13 Nov. - Sun, 16 Nov.
DEN
Denver
LHR
London
AU$792 Return, found 3 days ago
AU$792
Return
found 3 days ago
Select Icelandair flight, departing Thu, 13 Nov. from Denver to London, returning Sun, 16 Nov., priced at AU$792 found 3 days ago
Virgin Atlantic
Sun, 12 Oct. - Thu, 30 Oct.
DEN
Denver
LHR
London
AU$803 Return, found 10 hours ago
AU$803
Return
found 10 hours ago
Select Virgin Atlantic flight, departing Sun, 12 Oct. from Denver to London, returning Thu, 30 Oct., priced at AU$803 found 10 hours ago
Delta
Sun, 12 Oct. - Thu, 30 Oct.
DEN
Denver
LHR
London
AU$803 Return, found 10 hours ago
AU$803
Return
found 10 hours ago
Select Delta flight, departing Sun, 12 Oct. from Denver to London, returning Thu, 30 Oct., priced at AU$803 found 10 hours ago
Swiss International Air Lines
Mon, 4 Aug. - Tue, 19 Aug.
DEN
Denver
LHR
London
AU$815 Return, found 3 days ago
AU$815
Return
found 3 days ago
Select Swiss International Air Lines flight, departing Mon, 4 Aug. from Denver to London, returning Tue, 19 Aug., priced at AU$815 found 3 days ago

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

September is typically the cheapest month to fly

From AU$769 - AU$1,264 per traveller.

Graph displaying average flight prices per month

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Flight from Denver to London route information
Origin airport
Denver Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Icelandair, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic
Return price
AU$733
Distance
7454 km

Your quick guide to flights from Denver to London

Pick up great flights from Denver to London

With Expedia, you have your pick of 17 flights a day with 20 airlines covering flights from Denver to London. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Denver to London that take around 23 hours.

Find cheap flights from Denver to London

From the great flight deals with prices currently ranging from AU$734 to AU$815, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Denver to London around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to London is normally in September.

Reasons to book your flight from Denver to London with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Denver to London across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to London right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Frequently asked questions

How much is a flight from DIA airport to Heathrow Airport?
Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from DEN to Heathrow Airport (LHR) was AU$734. Cheap tickets don't stick around for long, so make sure you book yours ASAP. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Denver Airport to London Heathrow?
Most flights can be conveniently cancelled online, but whether or not you incur a fee differs between airlines. If you do have to cancel your getaway, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from DIA airport to Heathrow Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for DIA airport to LHR flights, you'll see a "no change fees" filter for you to select.
How far is the flight from DEN to Heathrow Airport?
With around 7 500 kilometres separating Denver Intl. Airport (DEN) and LHR, your flight will be a long one. Pack wisely to make your trip more comfortable. Things like warm clothes and some noise-cancelling headphones can make a massive difference.
Which airlines fly direct from DIA airport to Heathrow Airport (LHR)?
A leading airline that operates on the route from DIA airport to LHR is United Airlines (UA). It offers 30 flights monthly. If you'd like more options, check out the deals with British Airways (BA). This airline offers 30 flights monthly between these airports.
Are Denver Intl. Airport (DEN) to LHR flight tickets cheaper when they're purchased at the last minute?
Booking your trip from DIA airport to London Heathrow last minute could be your ticket to a cheap deal. However, you might miss out on a flight altogether! If you'd rather play it safe, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to a year in advance. If your preferred air carrier hasn't released tickets yet, check back regularly as deals are updated all the time on Expedia.

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