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

United Airlines, Iberia, and Delta can get you from Colorado to London Heathrow Airport in just under 12h 30m. Your travel time can differ by up to 8h 50m. There are 4711 mi between Colorado and London Heathrow Airport. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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

The most popular flight routes from Colorado to London Heathrow Airport are Denver Intl - London Heathrow, Colorado Springs - London Heathrow and Durango La Plata County - London Heathrow.

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

On average you can expect to pay £740 for a flight from Colorado to London Heathrow Airport. The cheapest flight overall is £423 while the most popular route, (Denver Intl - London Heathrow) is currently priced at £516.

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

Consider Air Canada (75%), Austrian Airlines (75%) or Brussels Airlines (75%) when booking your flight. These represent the most reliable airlines 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 holiday 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.

£229+ Cheap Flights from Colorado to London Heathrow Airport

Cheap flight deals from Colorado to Heathrow

Enter your travel dates to find the best prices.

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Best

Direct

Last-minute

One-way

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 4 September 2026.

Mon 7/1212:10 -

2 stops15h 40m

Wed 9/1207:30 -

2 stops15h 50m

Deal found 1/9£566

Mon 19/1016:40 -

1 stop12h 15m

Mon 2/1120:35 -

1 stop28h 25m

Deal found 4/9£569

Sun 25/1016:40 -

1 stop20h 50m

Sat 31/1020:35 -

1 stop28h 25m

Deal found 2/9£570

Sun 15/1115:40 -

1 stop20h 50m

Mon 30/1120:35 -

1 stop28h 25m

Deal found 2/9£572

Thu 17/918:40 -

Nonstop8h 55m

Wed 11/1112:10 -

Nonstop10h 00m

Deal found 2/9£573

Wed 28/1016:40 -

1 stop12h 10m

Wed 4/1112:15 -

1 stop12h 45m

Deal found 1/9£574

Fri 2/1018:35 -

Nonstop9h 00m

Thu 12/1112:10 -

Nonstop10h 00m

Deal found 1/9£574

Tue 20/1016:40 -

1 stop12h 15m

Tue 27/1020:35 -

1 stop28h 25m

Deal found 1/9£575

Sun 4/1018:35 -

Nonstop9h 00m

Thu 12/1112:10 -

Nonstop10h 00m

Deal found 1/9£577

Wed 30/918:35 -

Nonstop9h 00m

Fri 13/1112:10 -

Nonstop10h 00m

Deal found 1/9£578

Mon 28/916:40 -

1 stop12h 15m

Mon 16/1112:15 -

1 stop12h 45m

Deal found 2/9£580

Mon 28/916:40 -

1 stop12h 15m

Mon 19/1021:25 -

1 stop28h 35m

Deal found 1/9£580

Best flights from Colorado to Heathrow
Discover carefully curated flight deals from Colorado to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 September 2026.

Mon 7/1207:00 -

1 stop19h 40m

Wed 9/1207:30 -

2 stops16h 30m

Deal found 1/9£614

Mon 18/110:30 -

2 stops13h 45m

Fri 29/106:30 -

2 stops16h 26m

Deal found 2/9£652

Wed 13/113:01 -

2 stops17h 34m

Wed 27/119:05 -

2 stops22h 01m

Deal found 31/8£657

Sat 3/1006:00 -

2 stops50h 10m

Tue 6/1006:30 -

1 stop18h 55m

Deal found 1/9£673

Tue 6/1008:17 -

1 stop19h 43m

Tue 20/1010:55 -

1 stop13h 32m

Deal found 3/9£690

Sat 17/1012:15 -

2 stops25h 25m

Wed 4/1113:00 -

2 stops17h 59m

Deal found 3/9£698

Mon 7/1213:36 -

2 stops16h 14m

Wed 9/1211:35 -

1 stop28h 50m

Deal found 2/9£628

Sun 4/1011:10 -

1 stop18h 55m

Tue 20/1006:15 -

2 stops18h 17m

Deal found 3/9£661

Fri 11/1217:35 -

Nonstop9h 05m

Mon 21/1206:35 -

1 stop14h 55m

Deal found 4/9£705

Mon 19/1020:25 -

Nonstop9h 00m

Tue 27/1011:10 -

1 stop14h 55m

Deal found 1/9£645

Wed 30/906:00 -

2 stops21h 20m

Wed 14/1006:30 -

2 stops22h 52m

Deal found 2/9£674

Thu 15/1007:00 -

2 stops18h 35m

Thu 22/1006:55 -

2 stops20h 35m

Deal found 30/8£714

Wed 18/1111:25 -

1 stop12h 45m

Fri 27/1111:35 -

Nonstop9h 50m

Deal found 2/9£669

Thu 22/1006:20 -

1 stop17h 50m

Wed 28/1006:30 -

2 stops19h 36m

Deal found 4/9£692

Mon 7/1211:43 -

1 stop13h 12m

Wed 9/1211:35 -

1 stop17h 28m

Deal found 31/8£673

Thu 29/1013:31 -

1 stop16h 09m

Thu 5/1106:30 -

2 stops20h 46m

Deal found 1/9£708

Sat 28/1117:35 -

Nonstop9h 05m

Mon 7/1211:10 -

1 stop34h 20m

Deal found 31/8£691

Mon 26/1013:31 -

1 stop12h 19m

Sun 1/1106:30 -

2 stops20h 46m

Deal found 1/9£708

Mon 1/217:35 -

Nonstop9h 05m

Sun 7/211:35 -

Nonstop9h 50m

Deal found 4/9£696

Thu 12/1117:35 -

Nonstop9h 05m

Wed 18/1106:35 -

1 stop19h 30m

Deal found 3/9£705

Sun 15/1117:35 -

Nonstop9h 05m

Fri 8/111:35 -

Nonstop9h 50m

Deal found 1/9£709

Thu 15/1007:00 -

1 stop19h 40m

Thu 22/1014:05 -

2 stops37h 25m

Deal found 1/9£714

Mon 28/915:12 -

1 stop11h 28m

Mon 5/1014:05 -

2 stops34h 16m

Deal found 31/8£715

Fri 16/1015:12 -

1 stop11h 28m

Tue 27/1015:00 -

2 stops27h 45m

Deal found 3/9£718

Find flight deals from Colorado to Heathrow

Round-trip from	£566
One-way from	£229
Popular in	June
Cheapest in	January
Average price	£579
Good round-trip deal	£927 or less
Good one-way deal	£492 or less

United Airlines
7/12-9/12
4 total stops
33h 45m total
Colorado to London

Search Deals

Icelandair
27/2-31/12
1 total stop
20h 50m total
Colorado to London

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£133 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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.

Search Deals

Cheapflights Fare Finder

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 return flight

Fastest return journey

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Tue 2/3

17:35-09:40

Nonstop9h 05m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£240

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Mon 1/3

17:01-09:10

Nonstop9h 09m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£240

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Wed 2/12

06:25-06:50

2 stops17h 25m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£243

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Wed 3/3

09:48-10:50

2 stops18h 02m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£243

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Sun 28/2

07:05-07:20

2 stops17h 15m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£243

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Tue 29/9

13:25-11:20

1 stop14h 55m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£246

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Wed 3/3

17:01-09:10

Nonstop9h 09m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£251

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Fri 25/9

06:00-06:25

1 stop17h 25m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£257

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Mon 19/10

06:00-06:45

2 stops17h 45m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£261

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Wed 30/9

06:00-07:10

2 stops18h 10m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£264

Flights are sorted by cheapest return flights first.

Deals found on 3/9

Showing 1-10 of 47 resultsSorted by cheapest first

...

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.

DEN-LHR

COS-LHR

GJT-LHR

DRO-LHR

Estimated return 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

USCO-LHR

DEN-LHR

COS-LHR

GJT-LHR

DRO-LHR

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

Currently, February is the cheapest month in which you can book a flight from Colorado to London Heathrow Airport (average of £512). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of £973). 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?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to London Heathrow Airport as you normally would.

Weekly flight availability from Colorado to London Heathrow Airport

The most flights from USCO to LHR are scheduled on a Wednesday (17 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 on average).

How much does it cost for a return flight from Colorado to London Heathrow Airport?

Airfare is typical for this route at the moment.

Colorado to London Heathrow Airport flights typically cost between £515 and £738 in October.
The cheapest return price found within the last 5 days was £569 on Icelandair (19 Oct–2 Nov).

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 31 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.

Related info for your journey

How long is the flight from Colorado to London Heathrow Airport?
United Airlines, Iberia, and Delta can get you from Colorado to London Heathrow Airport in just under 12h 30m. Your travel time can differ by up to 8h 50m. There are 4711 mi between Colorado and London Heathrow Airport. Both multi-stop and direct flights can be found to your destination and back.
What are the most popular routes from Colorado to London Heathrow Airport?
The most popular flight routes from Colorado to London Heathrow Airport are Denver Intl - London Heathrow, Colorado Springs - London Heathrow and Durango La Plata County - London Heathrow.
What are the most reliable airlines from Colorado to London Heathrow Airport?
Consider Air Canada (75%), Austrian Airlines (75%) or Brussels Airlines (75%) when booking your flight. These represent the most reliable airlines when flying from Colorado to London Heathrow Airport.
What are the cheapest flights from Colorado to London Heathrow Airport?
On average you can expect to pay £740 for a flight from Colorado to London Heathrow Airport. The cheapest flight overall is £423 while the most popular route, (Denver Intl - London Heathrow) is currently priced at £516.
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 holiday 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, February is the cheapest month in which you can book a flight from Colorado to London Heathrow Airport (average of £512). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of £973). 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.

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Top 2 airlines flying from Colorado to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest£488	Average£812	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£514	Average£653	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Colorado to Heathrow?

Cheapflights makes it easy to find Colorado to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Colorado to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Colorado to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Colorado to Heathrow with no change fees?

Yes! Cheapflights helps users easily find flights from Colorado to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from Colorado to Heathrow become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Heathrow from Colorado today and book when prices fit your budget.

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Cheap flights from Colorado to London Heathrow Airport from £229

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Colorado to Heathrow

Cheapest flights from Colorado to HeathrowExplore 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 4 September 2026.

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 4 September 2026.

Best flights from Colorado to HeathrowDiscover carefully curated flight deals from Colorado to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 September 2026.

Discover carefully curated flight deals from Colorado to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 September 2026.

Direct flights from Colorado to HeathrowExplore direct flight options from Colorado to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 September 2026.

Explore direct flight options from Colorado to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 September 2026.

Last-minute flights from Colorado to HeathrowDiscover last-minute flight deals from Colorado to Heathrow. Data last updated 4 September 2026 and is based on user searches.

Discover last-minute flight deals from Colorado to Heathrow. Data last updated 4 September 2026 and is based on user searches.

One-way flights from Colorado to HeathrowSearch for one-way flight options from Colorado to Heathrow. Find affordable one-way fares based on user searches. Data last updated 4 September 2026.

Search for one-way flight options from Colorado to Heathrow. Find affordable one-way fares based on user searches. Data last updated 4 September 2026.

Find flight deals from Colorado to Heathrow

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

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.

Cheapflights Insights

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

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 4 September 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to London Heathrow Airport as you normally would.

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 4 September 2026.

The most flights from USCO to LHR are scheduled on a Wednesday (17 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (11 on average).

How much does it cost for a return flight from Colorado to London Heathrow Airport?

Airfare is typical for this route at the moment.

Colorado to London Heathrow Airport flights typically cost between £515 and £738 in October.The cheapest return price found within the last 5 days was £569 on Icelandair (19 Oct–2 Nov).

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 31 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.

Related info for your journey

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

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

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

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

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

How can I find direct flights from Colorado to Heathrow?

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

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

Travelling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

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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.

Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

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Search flights from Colorado to Heathrow by cabin class

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Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 4 September 2026.

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Can Cheapflights notify me if prices for flights from Colorado to Heathrow become cheaper?

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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 4 September 2026.

Best flights from Colorado to Heathrow
Discover carefully curated flight deals from Colorado to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 September 2026.

Direct flights from Colorado to Heathrow
Explore direct flight options from Colorado to Heathrow based on user searches, and compare prices and availability for your desired travel dates. Data last updated 4 September 2026.

Last-minute flights from Colorado to Heathrow
Discover last-minute flight deals from Colorado to Heathrow. Data last updated 4 September 2026 and is based on user searches.

One-way flights from Colorado to Heathrow
Search for one-way flight options from Colorado to Heathrow. Find affordable one-way fares based on user searches. Data last updated 4 September 2026.

Colorado to London Heathrow Airport flights typically cost between £515 and £738 in October.
The cheapest return price found within the last 5 days was £569 on Icelandair (19 Oct–2 Nov).