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Heathrow

$272+ 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 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LHR
Mar 9 — Mar 161
Mon 3/9
Mon 3/16
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 February 7, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 2/4. 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 3/235:20 pm
DEN
-
LHR
1 stop13h 40m
Lufthansa
Tue 3/318:25 pm
LHR
-
DEN
1 stop24h 55m
Lufthansa
Deal found 2/4$608
This Cheapflightsfares deal was found by Cheapflights users on 2/3. 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.
Wed 3/45:45 pm
DEN
-
LHR
1 stop15h 05m
Lufthansa
Wed 3/117:40 am
LHR
-
DEN
1 stop13h 55m
Lufthansa
Deal found 2/3$609
This Mytrip deal was found by Cheapflights users on 2/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/48:05 am
DEN
-
LHR
2 stops19h 05m
Multiple Airlines
Wed 3/117:40 am
LHR
-
DEN
1 stop13h 55m
Multiple Airlines
Deal found 2/3$610
This Gotogate deal was found by Cheapflights users on 2/3. 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 12/18:05 am
DEN
-
LHR
2 stops19h 05m
Multiple Airlines
Tue 12/86:35 am
LHR
-
DEN
1 stop15h 00m
Multiple Airlines
Deal found 2/3$611
This FlightHub deal was found by Cheapflights users on 2/4. 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 5/1011:25 am
DEN
-
LHR
1 stop15h 35m
Air Canada
Tue 5/126:00 am
LHR
-
DEN
2 stops20h 00m
Air Canada
Deal found 2/4$612
This Cheapflightsfares deal was found by Cheapflights users on 2/4. 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 9/14:15 pm
DEN
-
LHR
1 stop19h 10m
Lufthansa
Tue 9/156:55 am
LHR
-
DEN
1 stop13h 50m
Lufthansa
Deal found 2/4$613
This KAYAK deal was found by Cheapflights users on 2/4. 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.
Tue 3/314:40 pm
DEN
-
LHR
1 stop12h 15m
Icelandair
Wed 4/89:25 pm
LHR
-
DEN
1 stop28h 35m
Icelandair
Deal found 2/4$614
This CrystalTravel deal was found by Cheapflights users on 2/5. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/273:40 pm
DEN
-
LHR
1 stop12h 10m
Icelandair
Mon 3/212:15 pm
LHR
-
DEN
1 stop12h 50m
Icelandair
Deal found 2/5$615
This Gotogate deal was found by Cheapflights users on 2/5. 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.
Wed 3/115:30 pm
DEN
-
LHR
1 stop11h 50m
Multiple Airlines
Tue 3/177:40 am
LHR
-
DEN
1 stop13h 55m
Multiple Airlines
Deal found 2/5$616
This Cheapflightsfares deal was found by Cheapflights users on 2/6. 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 4/214:21 pm
DEN
-
LHR
2 stops16h 19m
Lufthansa
Tue 4/287:25 am
LHR
-
DEN
1 stop13h 55m
Lufthansa
Deal found 2/6$617
This United Airlines deal was found by Cheapflights users on 2/5. 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 3/96:35 pm
DEN
-
LHR
Nonstop9h 05m
United Airlines
Thu 3/1911:10 am
LHR
-
DEN
1 stop14h 45m
United Airlines
Deal found 2/5$618
This United Airlines deal was found by Cheapflights users on 2/3. 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 3/35:35 pm
DEN
-
LHR
Nonstop9h 05m
United Airlines
Wed 3/1111:10 am
LHR
-
DEN
1 stop14h 45m
United Airlines
Deal found 2/3$619

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 February 7, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$608
(Cheapflightsfares)

One-way from

$272
(Trip.com)

Popular in

June

Cheapest in

October

Average price

$666

Good round-trip deal

$636 or less

Good one-way deal

$349 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. 20% potential increase in price ($194 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from Colorado to London Heathrow.
Search Deals
Price to beat on a one-way flight from Colorado to London Heathrow.
Search Deals

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 February 7, 2026.
Use the filters below to find and compare flights from Colorado to London Heathrow Airport that are best for you.

Fly from

Colorado

Fly to

Heathrow

Route

Depart

Return

Price

AspenLondon

ASE - LHR

ASELHR

Aspen Pitkin County

Thu 3/5

4:01 pm-12:00 pm

1 stop36h 59m

London Heathrow

Mon 3/9

7:40 am-6:40 pm

2 stops17h 00m

$633

Grand JunctionLondon

GJT - LHR

GJTLHR

Grand Junction Regnl

Sun 3/8

11:10 am-9:40 am

1 stop16h 30m

London Heathrow

Sun 3/15

6:00 pm-10:22 pm

2 stops34h 22m

$647

DurangoLondon

DRO - LHR

DROLHR

Durango La Plata County

Fri 3/6

6:00 pm-9:20 pm

2 stops20h 20m

London Heathrow

Wed 3/11

7:30 am-8:58 pm

2 stops19h 28m

$649

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Mon 3/9

6:35 pm-9:40 am

Nonstop9h 05m

London Heathrow

Tue 3/24

9:10 am-7:40 pm

1 stop16h 30m

$657

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 3/25

6:35 pm-9:40 am

Nonstop9h 05m

London Heathrow

Sat 4/4

6:55 am-6:50 pm

1 stop18h 55m

$660

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Thu 4/23

8:20 pm-12:20 pm

Nonstop9h 00m

London Heathrow

Thu 5/14

6:55 am-2:20 pm

1 stop14h 25m

$660

AspenLondon

ASE - LHR

ASELHR

Aspen Pitkin County

Wed 4/15

6:19 pm-12:20 pm

1 stop11h 01m

London Heathrow

Tue 4/21

7:30 am-5:30 pm

2 stops17h 00m

$661

Colorado SpringsLondon

COS - LHR

COSLHR

Colorado Springs

Fri 3/6

12:00 pm-10:00 am

1 stop15h 00m

London Heathrow

Mon 3/9

10:45 am-8:28 pm

1 stop15h 43m

$662

Grand JunctionLondon

GJT - LHR

GJTLHR

Grand Junction Regnl

Wed 3/18

10:35 am-10:00 am

1 stop17h 25m

London Heathrow

Tue 3/24

11:55 am-8:50 pm

1 stop14h 55m

$662

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 2/25

11:59 pm-9:40 pm

1 stop14h 41m

London Heathrow

Sun 3/1

12:20 pm-10:59 pm

1 stop17h 39m

$662

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 54 results
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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

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 $474). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of $814). 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 February 7, 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 February 7, 2026.

The most flights from USCO to LHR are scheduled on a Monday (11 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 on average).

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 $662, United Airlines can have you in London Heathrow Airport from Colorado in 15h. The distance from Colorado to London Heathrow Airport is about 4711 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 $180. However, be on the lookout for offers from Aer Lingus and British Airways, 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 Colorado Springs - London Heathrow or Grand Junction Regnl - 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: American Airlines (75%), Aer Lingus (75%), Finnair (75%).

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

    Looking at all options, your cheapest flight can be booked for $251. While the most popular route (Denver Intl - London Heathrow) can be booked for $504 on average, our data indicates $1,546 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 $474). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of $814). 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
Croydon
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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Alternative routes for Colorado to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$857FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$474Average$640FlexibilityNo cancel feeOn-time76%
DeltaCheapest$528Average$787FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$536Average$779FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$551Average$795FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$559Average$712FlexibilityNo cancel feeOn-time72%
IberiaCheapest$565Average$709FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$568Average$950FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$568Average$747FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$620Average$707FlexibilityNo cancel feeOn-time76%

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