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

Delta, KLM, and United Airlines can get you from Colorado to London Heathrow Airport in just under 13h 55m. Your travel time can differ by up to 6h 28m. There are 4655 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 £725 for a flight from Colorado to London Heathrow Airport. The cheapest flight overall is £362 while the most popular route, (Denver Intl - London Heathrow) is currently priced at £409.

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

Consider Air Canada (76%), Austrian Airlines (76%) or Brussels Airlines (76%) 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.

£235+ 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 21 September 2026.

Wed 30/908:15 -

1 stop18h 45m

Wed 14/1015:15 -

1 stop36h 01m

Deal found 21/9£558

Sat 3/1016:17 -

1 stop31h 18m

Tue 13/1008:30 -

1 stop18h 47m

Deal found 21/9£558

Wed 4/1108:17 -

1 stop18h 43m

Wed 11/1110:00 -

2 stops17h 50m

Deal found 19/9£559

Tue 6/1015:30 -

1 stop16h 35m

Fri 9/1017:00 -

1 stop25h 02m

Deal found 21/9£560

Mon 28/920:25 -

Nonstop9h 00m

Mon 5/1020:25 -

1 stop24h 55m

Deal found 21/9£561

Mon 5/1009:40 -

2 stops15h 55m

Wed 14/1009:30 -

2 stops17h 47m

Deal found 21/9£562

Wed 4/1108:17 -

2 stops20h 23m

Wed 11/1106:30 -

2 stops21h 20m

Deal found 20/9£563

Mon 28/916:51 -

1 stop12h 59m

Tue 13/1009:45 -

1 stop14h 34m

Deal found 21/9£563

Wed 30/908:15 -

1 stop18h 45m

Wed 14/1010:55 -

1 stop18h 27m

Deal found 21/9£565

Tue 17/1111:25 -

1 stop12h 45m

Sun 22/1107:40 -

1 stop13h 50m

Deal found 21/9£565

Wed 30/908:15 -

1 stop18h 45m

Wed 14/1010:55 -

1 stop13h 32m

Deal found 17/9£566

Mon 28/918:05 -

1 stop29h 30m

Sun 11/1007:25 -

1 stop13h 55m

Deal found 21/9£566

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 21 September 2026.

Wed 4/1108:17 -

2 stops20h 23m

Wed 11/1106:30 -

2 stops21h 20m

Deal found 20/9£563

Wed 13/113:40 -

1 stop12h 20m

Wed 27/117:50 -

2 stops30h 24m

Deal found 17/9£567

Wed 13/108:00 -

2 stops19h 30m

Wed 27/120:25 -

2 stops27h 49m

Deal found 17/9£571

Sat 13/223:40 -

1 stop13h 55m

Mon 22/211:35 -

Nonstop9h 50m

Deal found 18/9£597

Tue 10/1106:00 -

1 stop17h 25m

Tue 1/1210:45 -

1 stop18h 39m

Deal found 18/9£610

Thu 1/1012:10 -

2 stops20h 50m

Sun 1/1106:40 -

2 stops24h 13m

Deal found 21/9£806

Thu 8/1012:22 -

1 stop14h 53m

Tue 13/1010:45 -

2 stops19h 59m

Deal found 20/9£596

Fri 13/1106:00 -

1 stop18h 50m

Thu 26/1106:20 -

2 stops18h 08m

Deal found 17/9£598

Fri 23/1019:50 -

1 stop34h 00m

Sat 31/1014:30 -

1 stop29h 13m

Deal found 19/9£620

Fri 13/1108:14 -

1 stop18h 46m

Thu 26/1106:20 -

2 stops18h 08m

Deal found 20/9£597

Thu 1/1017:35 -

Nonstop9h 05m

Sun 1/1113:00 -

1 stop14h 27m

Deal found 20/9£622

Sat 14/1113:31 -

1 stop12h 29m

Mon 23/1117:35 -

2 stops30h 53m

Deal found 21/9£606

Sat 7/1117:35 -

Nonstop9h 05m

Sat 21/1106:35 -

1 stop14h 55m

Deal found 18/9£636

Sat 24/1006:00 -

2 stops19h 45m

Mon 2/1106:30 -

2 stops20h 46m

Deal found 19/9£638

Mon 5/1015:12 -

1 stop14h 13m

Thu 15/1014:05 -

2 stops34h 26m

Deal found 18/9£654

Sat 13/223:13 -

3 stops39h 22m

Mon 22/218:30 -

2 stops34h 13m

Deal found 20/9£803

Thu 24/1216:44 -

1 stop11h 56m

Tue 29/1210:55 -

1 stop19h 16m

Deal found 21/9£646

Wed 9/1207:00 -

1 stop19h 40m

Wed 23/1209:30 -

2 stops18h 23m

Deal found 19/9£654

Sun 1/1118:14 -

1 stop32h 26m

Sun 8/1107:30 -

2 stops17h 09m

Deal found 17/9£655

Thu 15/1007:00 -

1 stop19h 40m

Thu 22/1017:40 -

2 stops33h 50m

Deal found 18/9£657

Wed 16/1207:05 -

1 stop16h 15m

Thu 31/1209:50 -

1 stop17h 11m

Deal found 21/9£760

Sun 18/1007:00 -

2 stops21h 35m

Sun 25/1018:00 -

2 stops32h 36m

Deal found 18/9£661

Sun 10/110:45 -

1 stop15h 55m

Sun 17/107:30 -

2 stops16h 35m

Deal found 17/9£662

Thu 10/1213:29 -

2 stops34h 41m

Fri 18/1211:35 -

1 stop30h 24m

Deal found 20/9£670

Thu 10/1207:00 -

2 stops20h 50m

Thu 17/1216:20 -

2 stops23h 59m

Deal found 20/9£671

Mon 11/113:15 -

1 stop13h 25m

Mon 18/111:35 -

1 stop12h 30m

Deal found 17/9£676

Sun 10/110:45 -

1 stop15h 55m

Mon 18/111:35 -

1 stop12h 30m

Deal found 17/9£676

Mon 11/107:00 -

2 stops17h 40m

Sun 17/110:25 -

2 stops17h 15m

Deal found 17/9£679

Sun 27/1217:35 -

Nonstop9h 05m

Tue 5/118:00 -

1 stop23h 35m

Deal found 19/9£726

Fri 25/1211:25 -

1 stop12h 45m

Thu 31/1206:35 -

1 stop14h 55m

Deal found 19/9£743

Find flight deals from Colorado to Heathrow

Round-trip from	£558
One-way from	£235
Popular in	June
Cheapest in	January
Average price	£657
Good round-trip deal	£805 or less
Good one-way deal	£500 or less

Air Canada
3/10-13/10
2 total stops
50h 05m total
Colorado to London

Search Deals

16/11-31/12
2 total stops
17h 45m total
Colorado to London

Search Deals

Highest demand for flights based on searches. 20% potential increase in price (£125 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£17 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.

Search Deals

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 9/2

17:35-09:40

Nonstop9h 05m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£243

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Mon 8/2

13:40-20:10

2 stops23h 30m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£249

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Fri 1/1

06:00-07:15

1 stop18h 15m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£283

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Wed 4/11

12:54-08:15

1 stop12h 21m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£288

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Wed 4/11

08:40-10:50

2 stops19h 10m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£288

Colorado SpringsLondon

COS Colorado Springs - LHR London Heathrow

COSLHR

Colorado Springs

Wed 4/11

07:40-06:30

3 stops15h 50m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£294

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Thu 1/10

15:15-20:45

1 stop22h 30m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£306

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Thu 24/12

23:59-21:20

2 stops14h 21m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£313

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Sat 19/12

17:40-06:30

1 stop29h 50m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£342

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Mon 21/12

17:01-09:10

Nonstop9h 09m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£353

Flights are sorted by cheapest return flights first.

Deals found on 17/9

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

DRO-LHR

GJT-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

DRO-LHR

GJT-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 £518). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of £980). 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 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 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 £533 and £752 in October.
The cheapest return price found within the last 5 days was £558 on Air Canada (3 Oct–13 Oct).

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?
Delta, KLM, and United Airlines can get you from Colorado to London Heathrow Airport in just under 13h 55m. Your travel time can differ by up to 6h 28m. There are 4655 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 (76%), Austrian Airlines (76%) or Brussels Airlines (76%) 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 £725 for a flight from Colorado to London Heathrow Airport. The cheapest flight overall is £362 while the most popular route, (Denver Intl - London Heathrow) is currently priced at £409.
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 £518). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of £980). 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£493	Average£710	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£520	Average£697	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 £235

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/11. 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 21 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 21 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 21 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 21 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 21 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 21 September 2026.

Last-minute flights from Colorado to HeathrowDiscover last-minute flight deals from Colorado to Heathrow. Data last updated 21 September 2026 and is based on user searches.

Discover last-minute flight deals from Colorado to Heathrow. Data last updated 21 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 21 September 2026.

Search for one-way flight options from Colorado to Heathrow. Find affordable one-way fares based on user searches. Data last updated 21 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 21 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 21 September 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 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 £533 and £752 in October.The cheapest return price found within the last 5 days was £558 on Air Canada (3 Oct–13 Oct).

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 21 September 2026.

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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 21 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 21 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 21 September 2026.

Last-minute flights from Colorado to Heathrow
Discover last-minute flight deals from Colorado to Heathrow. Data last updated 21 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 21 September 2026.

Colorado to London Heathrow Airport flights typically cost between £533 and £752 in October.
The cheapest return price found within the last 5 days was £558 on Air Canada (3 Oct–13 Oct).