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

Icelandair, Air Canada, and United Airlines can get you from Colorado to London Heathrow Airport in just under 14h 42m. Your travel time can differ by up to 5h 58m. 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, Durango La Plata County - London Heathrow and Colorado Springs - London Heathrow.

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

On average you can expect to pay £889 for a flight from Colorado to London Heathrow Airport. The cheapest flight overall is £552 while the most popular route, (Denver Intl - London Heathrow) is currently priced at £441.

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

Consider Air Canada (92%), Austrian Airlines (92%) or Brussels Airlines (92%) 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.

£185+ Cheap Flights from Colorado to London Heathrow Airport

Cheap flight deals from Colorado to Heathrow

Enter your travel dates to find the best prices.

Cheapest

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 10 November 2026.

Sun 15/1115:40 -

1 stop12h 10m

Wed 25/1112:15 -

1 stop12h 45m

Deal found 9/11£557

Sun 6/1215:40 -

2 stops16h 55m

Sun 13/1208:50 -

2 stops16h 10m

Deal found 6/11£559

Mon 16/1116:15 -

3 stops21h 50m

Fri 20/1120:45 -

3 stops30h 42m

Deal found 9/11£560

Mon 7/1215:40 -

1 stop20h 50m

Sun 13/1212:15 -

1 stop12h 45m

Deal found 8/11£561

Sun 15/1115:40 -

1 stop12h 10m

Sun 22/1120:35 -

1 stop28h 25m

Deal found 5/11£562

Mon 23/1115:40 -

1 stop20h 50m

Fri 4/1220:35 -

1 stop28h 25m

Deal found 9/11£564

Thu 3/1215:40 -

2 stops22h 25m

Tue 8/1208:50 -

2 stops16h 10m

Deal found 8/11£565

Tue 8/1215:40 -

1 stop12h 10m

Tue 22/1220:35 -

1 stop28h 25m

Deal found 9/11£566

Sat 14/1117:01 -

Nonstop9h 09m

Sat 5/1212:10 -

Nonstop10h 00m

Deal found 9/11£568

Wed 25/1115:40 -

1 stop20h 50m

Fri 4/1212:15 -

1 stop12h 45m

Deal found 6/11£569

Sat 5/1215:40 -

1 stop20h 50m

Fri 11/1212:15 -

1 stop12h 45m

Deal found 9/11£570

Wed 9/1215:40 -

1 stop20h 50m

Sun 13/1212:15 -

1 stop12h 45m

Deal found 10/11£571

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 10 November 2026.

Mon 8/215:40 -

1 stop20h 50m

Mon 15/220:35 -

1 stop28h 25m

Deal found 5/11£568

Wed 9/1213:01 -

1 stop13h 29m

Fri 25/1209:20 -

1 stop20h 32m

Deal found 6/11£636

Wed 24/217:35 -

Nonstop9h 05m

Wed 3/311:10 -

1 stop14h 55m

Deal found 6/11£653

Tue 23/310:30 -

1 stop15h 15m

Fri 2/408:40 -

2 stops18h 54m

Deal found 9/11£667

Wed 3/312:59 -

3 stops20h 26m

Mon 8/306:40 -

2 stops22h 37m

Deal found 8/11£699

Thu 10/1215:40 -

1 stop20h 50m

Thu 4/212:15 -

2 stops18h 40m

Deal found 10/11£719

Thu 24/1213:08 -

1 stop16h 02m

Thu 31/1216:30 -

2 stops27h 03m

Deal found 9/11£920

Tue 15/1207:00 -

2 stops22h 00m

Wed 6/113:30 -

2 stops38h 07m

Deal found 7/11£932

Mon 15/215:40 -

1 stop12h 10m

Tue 2/312:15 -

1 stop12h 45m

Deal found 9/11£642

Mon 3/520:20 -

Nonstop9h 05m

Wed 12/507:25 -

1 stop13h 20m

Deal found 9/11£656

Sun 14/207:10 -

1 stop19h 30m

Thu 18/207:30 -

2 stops20h 11m

Deal found 5/11£679

Wed 28/417:35 -

Nonstop9h 05m

Fri 21/511:25 -

Nonstop9h 50m

Deal found 5/11£681

Fri 19/311:25 -

1 stop13h 45m

Wed 24/311:35 -

Nonstop9h 50m

Deal found 9/11£718

Fri 19/317:40 -

1 stop11h 40m

Wed 31/311:25 -

Nonstop9h 50m

Deal found 8/11£722

Sat 5/1217:55 -

1 stop20h 25m

Sun 13/1211:35 -

Nonstop9h 50m

Deal found 7/11£741

Tue 15/1207:00 -

2 stops15h 55m

Wed 6/111:35 -

1 stop16h 02m

Deal found 7/11£983

Find flight deals from Colorado to Heathrow

Round-trip from	£556
One-way from	£186
Popular in	June
Cheapest in	January
Average price	£653
Good round-trip deal	£822 or less

Icelandair
14/4-22/4
2 total stops
49h 15m total
Colorado to London

Search Deals

Icelandair
10/12-31/12
1 total stop
20h 50m total
Colorado to London

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£108 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease (£16 potential savings vs. average return price).

Search Deals

Average for round-trip flights in November 2026

Search Deals

Price to beat on a round-trip 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

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Fri 19/3

23:30-06:55

1 stop25h 25m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£231

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Wed 21/4

06:15-05:55

2 stops16h 40m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£249

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Sun 11/4

06:30-06:45

2 stops17h 15m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£249

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Mon 1/2

22:50-12:50

3 stops31h 00m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£259

Fastest return journey

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Sat 17/4

18:40-10:35

Nonstop8h 55m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£283

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Fri 30/4

18:40-10:35

Nonstop8h 55m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£283

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Tue 15/12

14:12-17:30

3 stops20h 18m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£427

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Sat 13/3

23:49-21:35

3 stops38h 46m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£441

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Wed 28/4

14:20-22:00

3 stops24h 40m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£454

DenverLondon

DEN Denver Intl - LHR London Heathrow

DENLHR

Denver Intl

Tue 15/12

06:10-07:45

1 stop18h 35m

London Heathrow

Wed 31/12

00:00-16:00

Nonstop0h 00m

£464

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 28 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

GUC-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

GUC-LHR

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 £543). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of £984). 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 (11 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 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 £548 and £870 in April.
The cheapest return price found within the last 5 days was £556 on Icelandair (14 Apr–22 Apr).

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 75 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?
Icelandair, Air Canada, and United Airlines can get you from Colorado to London Heathrow Airport in just under 14h 42m. Your travel time can differ by up to 5h 58m. 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, Durango La Plata County - London Heathrow and Colorado Springs - London Heathrow.
What are the most reliable airlines from Colorado to London Heathrow Airport?
Consider Air Canada (92%), Austrian Airlines (92%) or Brussels Airlines (92%) 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 £889 for a flight from Colorado to London Heathrow Airport. The cheapest flight overall is £552 while the most popular route, (Denver Intl - London Heathrow) is currently priced at £441.
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, January is the cheapest month in which you can book a flight from Colorado to London Heathrow Airport (average of £543). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of £984). 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£492	Average£886	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£519	Average£885	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 £185

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/2. 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 10 November 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 10 November 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 10 November 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 10 November 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 10 November 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 10 November 2026.

Last-minute flights from Colorado to HeathrowDiscover last-minute flight deals from Colorado to Heathrow. Data last updated 10 November 2026 and is based on user searches.

Discover last-minute flight deals from Colorado to Heathrow. Data last updated 10 November 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 10 November 2026.

Search for one-way flight options from Colorado to Heathrow. Find affordable one-way fares based on user searches. Data last updated 10 November 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.

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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 10 November 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 10 November 2026.

The most flights from USCO to LHR are scheduled on a Monday (11 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 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 £548 and £870 in April.The cheapest return price found within the last 5 days was £556 on Icelandair (14 Apr–22 Apr).

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 75 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 10 November 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 10 November 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 10 November 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 10 November 2026.

Last-minute flights from Colorado to Heathrow
Discover last-minute flight deals from Colorado to Heathrow. Data last updated 10 November 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 10 November 2026.

Colorado to London Heathrow Airport flights typically cost between £548 and £870 in April.
The cheapest return price found within the last 5 days was £556 on Icelandair (14 Apr–22 Apr).