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Cheap Flights from London Heathrow (LHR) to Denver (DENA)

Compare London Heathrow to Denver flight deals

Find the cheapest month or even day of the year to fly to Denver

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Flight deals from London Heathrow to Denver

Looking for a cheap last-minute deal or the best return flight from London Heathrow to Denver? Find the lowest prices on one-way and return tickets right here.
Denver.£356 per passenger.Departing Tue, 27 Jan, returning Tue, 24 Feb.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 27 Jan, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Tue, 24 Feb, arriving in London Heathrow.Price includes taxes and charges.From £356, select.
Denver.£357 per passenger.Departing Tue, 13 Jan, returning Wed, 21 Jan.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 13 Jan, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Wed, 21 Jan, arriving in London Heathrow.Price includes taxes and charges.From £357, select.
Denver.£357 per passenger.Departing Thu, 5 Feb, returning Sun, 8 Feb.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 5 Feb, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Sun, 8 Feb, arriving in London Heathrow.Price includes taxes and charges.From £357, select.
Denver.£361 per passenger.Departing Tue, 3 Feb, returning Tue, 17 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 3 Feb, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Tue, 17 Mar, arriving in London Heathrow.Price includes taxes and charges.From £361, select.
Denver.£365 per passenger.Departing Thu, 29 Jan, returning Tue, 19 May.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 29 Jan, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Tue, 19 May, arriving in London Heathrow.Price includes taxes and charges.From £365, select.
Denver.£368 per passenger.Departing Mon, 9 Mar, returning Tue, 31 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Mon, 9 Mar, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Tue, 31 Mar, arriving in London Heathrow.Price includes taxes and charges.From £368, select.
Denver.£371 per passenger.Departing Tue, 13 Jan, returning Tue, 24 Mar.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Tue, 13 Jan, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Tue, 24 Mar, arriving in London Heathrow.Price includes taxes and charges.From £371, select.
Denver.£380 per passenger.Departing Thu, 16 Apr, returning Mon, 20 Apr.Return flight with Icelandair.Outbound indirect flight with Icelandair, departs from London Heathrow on Thu, 16 Apr, arriving in Denver International.Inbound indirect flight with Icelandair, departs from Denver International on Mon, 20 Apr, arriving in London Heathrow.Price includes taxes and charges.From £380, select.

Find the cheapest month to fly from London Heathrow to Denver

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London Heathrow to Denver flights are currently cheapest in January.
Dec
Find prices
Jan
from £357
Feb
from £357
Mar
from £368
Apr
from £380
May
from £392
Jun
from £533
Jul
from £526
Aug
from £589
Sep
from £386
Oct
from £381
Nov
from £381

Direct flights from London Heathrow to Denver

Alternative London Heathrow to Denver routes

Looking for the cheapest, fastest or easiest route from London Heathrow to Denver? You could fly into the following airports instead.

London to Denver: Flight information

The things to know before you go.
Cheapest flight found£356
Cheapest month to flyJanuary
Average flight time9 hrs, 53 mins
Most popular airlineAer Lingus

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

There are 4 airports in Denver: Denver Arapahoe Co, Broomfield, Denver International, and Northern Colorado Regional.
The best price we found for a return flight from London Heathrow to Denver is £356. 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.
9 hours and 53 minutes is the average flight time from London Heathrow to Denver.
Aer Lingus, SWISS and Air Canada fly direct from London Heathrow to Denver.
As of December 2025, there are no flights flying from London Heathrow to Denver.
The cheapest month to fly from London Heathrow to Denver is usually January.
If you're flying from London Heathrow Airport, the cheapest airport near Denver is Denver International – which is 18.6 miles away from the centre of Denver. We've found flights into this airport from £356.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Heathrow Airport to Denver on Tuesday, 27 January 2026.
Yes – the average flight time is 9 hours and 53 minutes.
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 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.
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.
In December, the average temperature is usually around -1°C. July is typically the warmest month in Denver, when it usually averages around 31°C. You can expect the least rain in January. The coldest month is December, with temperatures averaging -6°C. The rainiest month is July.
Currently, Icelandair and British Airways offer the cheapest flight tickets to Denver.

Flying from London Heathrow Airport (LHR) to Denver: what you need to know

  • Take a direct flight from London Heathrow Airport to Denver and you'll be in the air for around 9 hours.

  • London Heathrow Airport is located in London. Following the UTC-6 timezone, Denver is six hours behind London.

  • London Heathrow Airport (LHR) to Denver International Airport (DEN) is the most traveled route, with 18 departures a week to choose from. If you prefer starting your day later, the last flight from LHR to DEN is with United Airlines at 14:50. Go for the first departure with United Airlines at 11:25 if you want to get on your way earlier.

  • For hassle-free travel, arrive at the airport two hours ahead of international flights and an hour before domestic departures. That way, you can comfortably catch your LHR to Denver flight.

  • Longer lines at check-in and security are more likely if you're flying during high season, so allow some extra wiggle room. A good rule for peak times? Get there up to four hours ahead for international flights and two hours for domestic departures.

  • You can book a direct London Heathrow Airport to Denver ticket. Start your trip at LHR and land at Denver International Airport (DEN).

  • United Airlines is a leading airline that operates direct flights from London Heathrow Airport to Denver.

  • We make it easy to book plane tickets from LHR to Denver with a stopover. To see the options, deselect 'Direct flights only.' Then, choose a flight with a stop long enough to tour your chosen city. Major stopovers include:

    • O'Hare International Airport (ORD)

    • Minneapolis-St. Paul International Airport (MSP)

    • Keflavik International Airport (KEF)

  • Travelling from central London to LHR takes about 1 hour by public transport. If you drive, ride-share or grab a cab, you'll cover the 16 miles in 55 minutes or so, depending on traffic conditions.

  • Searching for a hotel close to LHR? If you're catching an early flight from London Heathrow Airport to Denver, these accommodation options will put you moments from check-in:

  • 68.18% of flights that depart London Heathrow Airport touch down at their destination on time.

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

  • £292 is the cheapest price we've found for a one-way London Heathrow Airport to Denver flight. A round-trip plane ticket right now is £356. Depending on how early you book and the availability, these fares could change.

  • To pick up cheap flights from LHR to Denver, reserve your trip one month before your departure date.

  • May is the best month for nabbing an awesome deal on London Heathrow Airport to Denver tickets. If you need to travel during a different time of year, the 'Whole month' tool will give you the lowest prices for every month.

  • Never miss a deal on cheap flights from LHR to Denver by creating a Price Alert. You'll get an email or notification through the app when a special offer becomes available.

  • Find an affordable flight from London Heathrow Airport to Denver with the help of our filters. Select your preferred duration, departure time and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Denver

Denver International Airport (DEN)

  • Denver International Airport (DEN) is around 25 miles from central Denver. If you're getting a cab or a ride-share, the drive will take roughly 35 minutes.

  • Getting to the centre on public transport will take you around 1 hour 30 minutes.

  • Consider checking in to Baymont by Wyndham Denver International Airport after your flight from London Heathrow Airport to Denver. It's a short drive from DEN and a good option if you want to relax as soon as possible.

  • Hit the road running by picking up a Denver International Airport rental car. Grab a set of wheels from Routes Car Rentals, Dollar or Budget and explore beyond Denver's usual tourist stops.

  • Reserving your vehicle from Denver International Airport around one week in advance of your flight from LHR to Denver can help you secure the lowest rate.

  • DEN is located at 8500 Pena Boulevard.

Best time to go to Denver

  • Carefully consider your dates before booking your flight from London Heathrow Airport to Denver. The city comes alive during high season, but prices are often higher and top attractions can be busy. Plan your trip to Denver in low season for a quieter vibe.

  • Before locking in your London Heathrow Airport to Denver plane ticket, think about the kind of weather you prefer. July is the warmest month in Denver, with temperatures ranging from 14ºC (57ºF) to 32ºC (90ºF).

  • January has average temperatures of between -9ºC (16ºF) and 7ºC (45ºF). Search for a cheap ticket from LHR to Denver around that time if you like travelling in cooler conditions.

More about Denver

Explore more of United States

  • Denver has its own special appeal, but there are so many other parts of United States just waiting to be discovered. About 65 miles south of Denver, a visit to Colorado Springs will keep you busy. Check out popular attractions like US Northern Command (USNORTHCOM) / North American Aerospace Defence Command (NORAD) Headquarters, Cheyenne Mountain Air Force Station and National Strength and Conditioning Association (NSCA).

  • If you're interested in discovering another major destination in United States, head for Pueblo, roughly 100 miles south of Denver. Pueblo Weisbrod Aircraft Museum, Rosemount Museum and Pueblo Zoo are key highlights.

Plan the rest of your trip from London to Denver

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.