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

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Flight deals from London Heathrow to Denver International

Looking for a cheap last-minute deal or the best return flight from London Heathrow Airport to Denver International Airport? If you want to travel next month, return fares start from $954. Find the lowest prices on one-way and return tickets right here.

Denver.$954 per passenger.Departing Wed, 7 Oct, returning Wed, 21 Oct.Return flight with Virgin Atlantic and Frontier Airlines.Outbound indirect flight with Virgin Atlantic, departs from London Heathrow on Wed, 7 Oct, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 21 Oct, arriving in London Heathrow.Price includes taxes and charges.From $954, select.

Denver.$1,015 per passenger.Departing Wed, 28 Apr, returning Tue, 4 May.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Wed, 28 Apr, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Tue, 4 May, arriving in London Heathrow.Price includes taxes and charges.From $1,015, select.

Denver.$1,017 per passenger.Departing Tue, 10 Nov, returning Sun, 15 Nov.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 10 Nov, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sun, 15 Nov, arriving in London Heathrow.Price includes taxes and charges.From $1,017, select.

Denver.$1,039 per passenger.Departing Fri, 18 Sep, returning Fri, 25 Sep.Return flight with Virgin Atlantic and Frontier Airlines.Outbound indirect flight with Virgin Atlantic, departs from London Heathrow on Fri, 18 Sep, arriving in Denver International.Inbound indirect flight with Frontier Airlines, departs from Denver International on Fri, 25 Sep, arriving in London Heathrow.Price includes taxes and charges.From $1,039, select.

Denver.$1,060 per passenger.Departing Wed, 31 Mar, returning Wed, 7 Apr.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Wed, 31 Mar, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Wed, 7 Apr, arriving in London Heathrow.Price includes taxes and charges.From $1,060, select.

Denver.$1,062 per passenger.Departing Wed, 21 Oct, returning Sun, 1 Nov.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Wed, 21 Oct, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sun, 1 Nov, arriving in London Heathrow.Price includes taxes and charges.From $1,062, select.

Denver.$1,069 per passenger.Departing Tue, 6 Apr, returning Sat, 17 Apr.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 6 Apr, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sat, 17 Apr, arriving in London Heathrow.Price includes taxes and charges.From $1,069, select.

Denver.$1,087 per passenger.Departing Sat, 22 May, returning Mon, 31 May.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Sat, 22 May, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Mon, 31 May, arriving in London Heathrow.Price includes taxes and charges.From $1,087, select.

Denver.$1,087 per passenger.Departing Sat, 12 Dec, returning Mon, 18 Jan.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Sat, 12 Dec, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Mon, 18 Jan, arriving in London Heathrow.Price includes taxes and charges.From $1,087, select.

Denver.$1,089 per passenger.Departing Thu, 8 Jul, returning Mon, 12 Jul.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 8 Jul, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Mon, 12 Jul, arriving in London Heathrow.Price includes taxes and charges.From $1,089, select.

Denver.$1,090 per passenger.Departing Thu, 17 Jun, returning Sun, 20 Jun.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 17 Jun, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sun, 20 Jun, arriving in London Heathrow.Price includes taxes and charges.From $1,090, select.

Denver.$1,099 per passenger.Departing Sun, 24 Jan, returning Sun, 31 Jan.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Sun, 24 Jan, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sun, 31 Jan, arriving in London Heathrow.Price includes taxes and charges.From $1,099, select.

Denver.$1,100 per passenger.Departing Fri, 5 Feb, returning Fri, 19 Feb.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Fri, 5 Feb, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Fri, 19 Feb, arriving in London Heathrow.Price includes taxes and charges.From $1,100, select.

Denver.$1,100 per passenger.Departing Tue, 1 Dec, returning Wed, 9 Dec.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 1 Dec, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Wed, 9 Dec, arriving in London Heathrow.Price includes taxes and charges.From $1,100, select.

Denver.$1,100 per passenger.Departing Fri, 6 Nov, returning Sun, 6 Dec.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Fri, 6 Nov, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sun, 6 Dec, arriving in London Heathrow.Price includes taxes and charges.From $1,100, select.

Denver.$1,100 per passenger.Departing Tue, 19 Jan, returning Sat, 6 Feb.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 19 Jan, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sat, 6 Feb, arriving in London Heathrow.Price includes taxes and charges.From $1,100, select.

Find the cheapest month to fly from London Heathrow to Denver International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Denver International flights are currently cheapest in October.

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Direct flights from London Heathrow to Denver International

London Heathrow to Denver International: Alternative routes

Compare routes from London Heathrow to Denver below. You may find an airport to fly into that's cheaper, faster, or easier than Denver International.

Denver International

30km from central Denver

ClosestCheapest

from $954

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London to Denver: Flight information

The things to know before you go.

Cheapest flight found	$954
Cheapest month to fly	October
Average flight time	9 hrs, 52 mins
Most popular airline	Air Canada
Average flights per week	105

Finding cheap flights from London Heathrow to Denver International: Frequently asked questions

How much are return flights from London Heathrow to Denver International?

The best price we found for a return flight from London Heathrow to Denver International is $954. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from London Heathrow to Denver International?

9 hours and 52 minutes is the average flight time from London Heathrow to Denver International.

Which airlines fly direct from London Heathrow to Denver International?

Air Canada, SWISS and Lufthansa fly direct from London Heathrow to Denver International.

How many flights are there a week from London Heathrow to Denver International?

As of September 2026, there are 105 flights per week flying from London Heathrow to Denver International.

When is the cheapest time to fly from London Heathrow to Denver International?

The cheapest month to fly from London Heathrow to Denver International is usually October.

Which upcoming date is cheapest to fly from London Heathrow Airport to Denver International Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Denver International Airport on Wednesday, 7 October 2026.

Can I get a direct flight from London Heathrow Airport to Denver International Airport?

Yes – the average flight time is 9 hours and 52 minutes.

How can I find the best flight deal to Denver International?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Denver International but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Denver?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Denver is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly from London Heathrow Airport to Denver International with?

Currently, Virgin Atlantic and Lufthansa offer the cheapest flight tickets to Denver International.

Travelling from London Heathrow Airport (LHR) to Denver International Airport (DEN): what you need to know

The average time for a direct flight from London Heathrow Airport to Denver International Airport is 9 hours 50 minutes.
The timezone in Denver is UTC-7, which is seven hours behind London.
You can choose from 18 weekly London Heathrow Airport to Denver International Airport flights. The 11:25 departure with United Airlines is the earliest flight you can take. United Airlines operates the latest service of the day at 14:50.
Give yourself plenty of time to catch your LHR to DEN flight. As a general rule, turn up at least two hours before international departures and an hour ahead for domestic flights.
During popular months like July, it's a good idea to get to the airport well in advance. Plan to arrive two hours before domestic departures and four hours ahead of international flights whenever you're flying during peak periods in general.
United is your ticket to exploring Denver (and maybe even some other exciting corners of the United States!). Browse the direct flights from London Heathrow Airport to Denver International Airport offered by this airline.
Most travellers choose to travel with United on this route.
With a reliable 90.91% of services landing on schedule, British Airways is the most punctual carrier for LHR to DEN flights.
We make it a piece of cake to book a flight with a stopover. To see all your options for tickets from London Heathrow Airport to Denver International Airport, uncheck 'Direct flights only.' Then, choose a flight offering a stop long enough to tour your chosen city. Some great stopovers between LHR and DEN include:
- Chicago O'Hare International Airport
- Minneapolis St Paul Airport
- Reykjavik Keflavik Airport

How to find the cheapest flights from London Heathrow Airport (LHR) to Denver International Airport (DEN)

The lowest price we've found for a one-way London Heathrow Airport to Denver International Airport flight is $588. A return fare right now is $954. Depending on the availability and when you book, these fares could change.
Don't leave things to the last minute. You're more likely to find cheap tickets from LHR to DEN if you book ahead. Airlines often offer some great early bird rates.
Plan your trip for May. That's the cheapest month for flights from London Heathrow Airport to Denver International Airport. If you have flexibility with your dates, use the 'Whole month' tool to find the lowest airfare across every month.
There's no need to check every day to see if fares have dropped when you create a Price Alert. We'll send you an update as soon as a special offer becomes available on cheap flights from LHR to DEN.
Tailor your trip with filters. Select your ideal arrival and departure times, airlines and total journey duration. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from London Heathrow Airport to Denver International Airport.

Handy information about London Heathrow Airport (LHR)

78% of flights leaving from London Heathrow Airport reach their destination on time.
Central London to London Heathrow Airport is around 24 kilometres. Depending on traffic, it'll take about 45 minutes to get there if you're catching a taxi, ride-sharing or driving.
Expect a trip time of about 25 minutes when using public transport.
Get your journey off to a stress-free start by staying near LHR. Whether you're catching an early flight from London Heathrow Airport to Denver International Airport or want to avoid feeling rushed, these hotels are the answer:

Arriving at Denver International Airport (DEN)

Consider staying at Baymont by Wyndham Denver International Airport after touching down from your London Heathrow Airport to Denver International Airport flight. It's only a short drive from DEN and a great option if you want to freshen up right away.
Grab a Denver International Airport rental car and discover Denver and beyond with your own set of wheels. Routes Car Rentals, Dollar and Budget are popular providers to choose from here.
Lock in the best possible rate by reserving your ride from Denver International Airport about one week before your departure date.

Getting from Denver International Airport (DEN) to central Denver

DEN is located at 8500 Pena Boulevard.
From Denver International Airport, Denver is approximately 40 kilometres away. It takes around 35 minutes to drive to the centre.
When travelling on public transport, expect a journey time of roughly 35 minutes.

When to fly to Denver International Airport (DEN)

It's time to plan your dates for your flight from London Heathrow Airport to Denver International Airport. July is the most popular month to visit Denver. If you'd like a more laid-back vibe, go in January.
Lock in your flight from London Heathrow Airport to Denver International Airport for July if you'd like to explore Denver during its warmest month. You can expect temperatures of between 14ºC (57ºF) and 32ºC (90ºF).
January sees average temperatures of between -9ºC (16ºF) and 7ºC (45ºF). Look for cheap tickets from LHR to DEN sometime around then if you'd rather travel in cooler conditions.

Explore more of the United States

Denver is always a good idea, but there are so many other parts of the United States just waiting to be discovered. Around 105 kilometres south of Denver, a trip to Colorado Springs will keep your itinerary packed. Check out popular attractions like Garden of the Gods, Pikes Peak Region Attractions and Red Rock Canyon.
If there's time to check out another great destination in the United States, head for Aurora, about 13 kilometres east of Denver. Plains Conservation Centre, DeLaney Homestead Historic District and Aircraft viewing are highlights.