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Heathrow

$335+ Cheap flights from Colorado to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LHR
Jun 15 — Jun 221
Mon 6/15
Mon 6/22
1 adult, Economy
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Cheap flight deals from Colorado to Heathrow

Cheapest flights from Colorado to Heathrow
Explore the most affordable flight options available from Colorado to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 16, 2026.

This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/107:30 am
COS
-
LHR
2 stops21h 30m
United Airlines
Thu 11/1211:10 am
LHR
-
COS
2 stops16h 46m
United Airlines
Deal found 5/12$817
This KAYAK deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/238:10 pm
DEN
-
LHR
1 stop32h 45m
Icelandair
Thu 9/31:05 pm
LHR
-
DEN
1 stop12h 55m
Icelandair
Deal found 5/11$833
This Gotogate deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/611:25 am
DEN
-
LHR
1 stop12h 05m
Multiple Airlines
Tue 10/137:25 am
LHR
-
DEN
1 stop13h 55m
Multiple Airlines
Deal found 5/11$839
This Gotogate deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/611:25 am
DEN
-
LHR
1 stop12h 05m
Multiple Airlines
Tue 10/207:25 am
LHR
-
DEN
1 stop13h 55m
Multiple Airlines
Deal found 5/11$841
This FlightHub deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:40 am
DEN
-
LHR
2 stops19h 55m
Scandinavian Airlines
Thu 9/37:05 am
LHR
-
DEN
2 stops22h 44m
Scandinavian Airlines
Deal found 5/11$844
This Cheapflightsfares deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/254:15 pm
DEN
-
LHR
1 stop16h 25m
Lufthansa
Tue 9/16:55 am
LHR
-
DEN
1 stop13h 50m
Lufthansa
Deal found 5/11$849
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:40 am
DEN
-
LHR
1 stop20h 40m
United Airlines
Thu 10/227:25 am
LHR
-
DEN
1 stop13h 55m
United Airlines
Deal found 5/11$854
This Cheapflightsfares deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/84:15 pm
DEN
-
LHR
1 stop13h 35m
Multiple Airlines
Wed 9/236:00 am
LHR
-
DEN
2 stops17h 25m
Multiple Airlines
Deal found 5/12$856
This FlightHub deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/38:05 am
DEN
-
LHR
1 stop20h 45m
Air Canada
Fri 11/136:50 am
LHR
-
DEN
2 stops20h 05m
Air Canada
Deal found 5/12$857
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/711:25 am
DEN
-
LHR
1 stop12h 05m
United Airlines
Thu 10/157:25 am
LHR
-
DEN
1 stop13h 55m
United Airlines
Deal found 5/12$858
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/263:55 pm
DEN
-
LHR
1 stop12h 55m
United Airlines
Wed 11/46:35 am
LHR
-
DEN
1 stop15h 00m
United Airlines
Deal found 5/12$859
This Cheapflightsfares deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/214:15 pm
DEN
-
LHR
1 stop20h 25m
Lufthansa
Thu 10/16:30 am
LHR
-
DEN
1 stop16h 10m
Lufthansa
Deal found 5/13$860

Find flight deals from Colorado to Heathrow

Keep the following information in mind while searching for Colorado to Heathrow flight deals. Data was last updated May 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$817
(United Airlines)

One-way from

$335
(United Airlines)

Popular in

June

Cheapest in

October

Average price

$928

Good round-trip deal

$976 or less

Good one-way deal

$503 or less
Provider with most accurate pricing for Denver Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-London (LON) flights.
Search Deals
From Colorado to London Heathrow
Search Deals
One-way flight from Colorado to London Heathrow
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($240 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Colorado to London Heathrow.
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Price to beat on a one-way flight from Colorado to London Heathrow.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Heathrow that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 16, 2026.
Use the filters below to find and compare flights from Colorado to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Colorado SpringsLondon

COS - LHR

COSLHR

Colorado Springs

Tue 11/10

7:30 am-12:00 pm

2 stops21h 30m

London Heathrow

Thu 11/12

11:10 am-8:56 pm

2 stops16h 46m

$817

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Mon 9/21

7:15 pm-5:35 pm

1 stop15h 20m

London Heathrow

Thu 10/1

6:30 am-3:31 pm

2 stops16h 01m

$867

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Thu 10/1

5:35 pm-9:40 am

Nonstop9h 05m

London Heathrow

Tue 10/6

7:25 am-2:20 pm

1 stop13h 55m

$879

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Thu 8/20

6:40 am-4:00 pm

2 stops26h 20m

London Heathrow

Sat 8/29

6:40 am-9:49 pm

2 stops22h 09m

$882

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Sat 9/12

11:59 pm-9:20 pm

1 stop14h 21m

London Heathrow

Wed 9/30

2:50 pm-5:40 pm

Nonstop9h 50m

$887

AspenLondon

ASE - LHR

ASELHR

Aspen Pitkin County

Wed 9/9

2:17 pm-12:50 pm

2 stops15h 33m

London Heathrow

Wed 9/23

6:55 am-5:18 pm

2 stops17h 23m

$890

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Fri 10/23

11:25 am-10:00 am

1 stop15h 35m

London Heathrow

Mon 11/2

1:50 pm-2:35 pm

1 stop31h 45m

$892

AspenLondon

ASE - LHR

ASELHR

Aspen Pitkin County

Tue 11/10

7:00 am-9:40 am

1 stop19h 40m

London Heathrow

Thu 11/12

6:35 am-6:26 pm

2 stops18h 51m

$895

AspenLondon

ASE - LHR

ASELHR

Aspen Pitkin County

Wed 9/9

12:48 pm-2:25 pm

1 stop18h 37m

London Heathrow

Wed 9/23

11:00 am-8:16 pm

1 stop16h 16m

$897

Grand JunctionLondon

GJT - LHR

GJTLHR

Grand Junction Regnl

Mon 8/10

12:12 pm-3:05 pm

1 stop19h 53m

London Heathrow

Thu 8/20

12:55 pm-10:05 am

1 stop28h 10m

$900

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/11

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Colorado to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Colorado with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado to London Heathrow Airport

How far ahead should I book a flight from Colorado to London Heathrow Airport?

To ensure you get the cheapest price possible for a flight from Colorado to London Heathrow Airport, you should look to book at least 10 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Colorado to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Colorado to London Heathrow Airport (average of $101). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of $807). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CO to LHR?

Find hourly flight availability from Colorado to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 16, 2026.

When flying from Colorado to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Colorado to London Heathrow Airport

Explore weekly flight availability from Colorado to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 16, 2026.

The most flights from USCO to LHR are scheduled on a Monday (17 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (17 on average).

How much does it cost to fly round-trip from Colorado to London Heathrow Airport?

Related info for your journey

Find useful and relevant information for your journey from Colorado to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Colorado to London Heathrow Airport?

    For as low as $867, United Airlines can have you in London Heathrow Airport from Colorado in 15h 20m. The distance from Colorado to London Heathrow Airport is about 4655 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Colorado to London Heathrow Airport one-way?

    The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as $160. However, be on the lookout for offers from British Airways and Iberia, as they are both options that can get you from Colorado to London Heathrow Airport for a low price.

  • What are the most popular routes from Colorado to London Heathrow Airport?

    While some choose either Grand Junction Regnl - London Heathrow or Colorado Springs - London Heathrow, Denver Intl - London Heathrow is the most popular route from Colorado to London Heathrow Airport.

  • What are the most reliable airlines from Colorado to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Colorado to London Heathrow Airport on time: Air Canada (92%), Austrian Airlines (92%), Brussels Airlines (92%).

  • What are the cheapest flights from Colorado to London Heathrow Airport?

    Looking at all options, your cheapest flight can be booked for $376. While the most popular route (Denver Intl - London Heathrow) can be booked for $724 on average, our data indicates $1,598 when flying from Colorado to London Heathrow Airport.

  • Can I find deals for flights from Colorado to Heathrow that include hotel bookings?

    Yes. In addition to deals on Colorado to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Heathrow.

  • Can I find deals for business class flights from Colorado to Heathrow?

    Yes. Cheapflights offers flight deals from Colorado to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Colorado to London Heathrow Airport (average of $101). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of $807). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Dorking
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Colorado to Heathrow

Discover the top 10 airlines that operate flights from Colorado to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$462Average$618FlexibilityNo cancel feeOn-time76%
DeltaCheapest$528Average$874FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$534Average$799FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$551Average$826FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$559Average$712FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$568Average$952FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$568Average$767FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$598Average$723FlexibilityNo cancel feeOn-time77%
FinnairCheapest$623Average$770FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$661Average$1,029FlexibilityNo cancel feeOn-time76%

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