£187 Find Cheap Flights from Colorado to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 21/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest return fare
£436
Overall average: £480
Air Canada
Sun 1/3Tue 17/3
DEN - LHR • 1 stop
Cheapest direct flights
£462
Typical prices: £464-£571
British Airways
Wed 25/2Wed 4/3
DEN - LHR • Direct
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We hope you love your trip to Heathrow!
Flight Deals
Useful Info
Flight Deals

Cheap Flights from Colorado to Heathrow

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Colorado to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Colorado to Heathrow

Sun, 1 Mar - Tue, 17 Mar
Air Canada Logo
08:05 - 11:50
DEN
-
LHR
20h 45m
1 stop
Air Canada Logo
06:50 - 19:55
LHR
-
DEN
19h 05m
2 stops
£436Air Canada
Mon, 2 Mar - Thu, 12 Mar
Multiple Airlines Logo
08:05 - 10:10
DEN
-
LHR
19h 05m
2 stops
Multiple Airlines Logo
06:35 - 15:35
LHR
-
DEN
15h 00m
1 stop
£436Multiple Airlines
Thu, 16 Apr - Sun, 3 May
Icelandair Logo
16:40 - 11:55
DEN
-
LHR
12h 15m
1 stop
Icelandair Logo
21:25 - 19:00
LHR
-
DEN
28h 35m
1 stop
£438Icelandair
Mon, 2 Mar - Fri, 6 Mar
Icelandair Logo
15:40 - 10:50
DEN
-
LHR
12h 10m
1 stop
Icelandair Logo
12:15 - 18:05
LHR
-
DEN
12h 50m
1 stop
£439Icelandair
Sun, 1 Mar - Tue, 17 Mar
Multiple Airlines Logo
19:05 - 11:50
DEN
-
LHR
33h 45m
1 stop
Multiple Airlines Logo
07:40 - 15:35
LHR
-
DEN
13h 55m
1 stop
£439Multiple Airlines
Mon, 23 Mar - Tue, 31 Mar
Icelandair Logo
16:40 - 19:30
DEN
-
LHR
20h 50m
1 stop
Icelandair Logo
21:25 - 19:00
LHR
-
DEN
28h 35m
1 stop
£441Icelandair
Sun, 1 Mar - Wed, 18 Mar
Lufthansa Logo
17:45 - 20:50
DEN
-
LHR
20h 05m
1 stop
Lufthansa Logo
06:35 - 15:35
LHR
-
DEN
15h 00m
1 stop
£441Lufthansa
Tue, 31 Mar - Fri, 10 Apr
Lufthansa Logo
16:05 - 18:25
DEN
-
LHR
19h 20m
1 stop
Lufthansa Logo
07:25 - 14:20
LHR
-
DEN
13h 55m
1 stop
£442Lufthansa
Thu, 30 Apr - Sat, 2 May
United Airlines Logo
07:45 - 12:20
COS
-
LHR
21h 35m
1 stop
United Airlines Logo
06:50 - 18:19
LHR
-
COS
18h 29m
2 stops
£457United Airlines
Thu, 30 Apr - Sat, 2 May
United Airlines Logo
11:40 - 10:40
COS
-
LHR
16h 00m
2 stops
United Airlines Logo
06:50 - 18:19
LHR
-
COS
18h 29m
2 stops
£460United Airlines
Useful Info

Good to know - Cheap tickets from Colorado to London Heathrow Airport

Low seasonJanuary
Cheapest flight£187
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (8% more expensive on average)
Flight from Denver to London Heathrow Airport

Flights from Colorado to Heathrow: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from Colorado to Heathrow 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with British Airways
DEN
-
LHR
Dec 2025
Jst take one cashing bag no checked luggage-so much easier
TressaFlew with Lufthansa
DEN
-
LHR
Dec 2024
Make your layover longer because you will need it for all the walking at Heathrow
Verified travelerFlew with Iberia
DEN
-
LHR
Sept 2024
Coming from Denver with London as a layover you will have to go through security again

FAQs for booking Colorado to London Heathrow Airport flights

  • How does KAYAK find such low prices on flights from Colorado to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Colorado to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Colorado to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from Colorado is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Colorado to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to Colorado with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Colorado to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Travelling to a place near Heathrow?

Book flights to Heathrow if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Hounslow
Luton
Southend-on-Sea
Swindon
Northampton
Slough
Winchester
Croydon
Stansted
Folkestone
Poole
Maidstone
Chichester
Salisbury
Colchester
Chelmsford
Crawley

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)