How long does it take to fly to London?

If you’re flying from a popular airport in Colorado, such as Denver or Colorado Springs, and flying into London, then you can expect flight times to average 8h 55m and 11h 02m, respectively.

What is the cheapest airline that flies from Colorado to London?

JetBlue, Finnair, and Lufthansa are the most popular carriers operating from Colorado to London

How many flights depart from Colorado to London on average per day?

As of December 2025, 11 flights take off from Colorado and land in London each day. The most common flight departure time for this route is 5:00PM, with 100% of daily flights taking off in the afternoon.

What airlines fly to London?

United Airlines, British Airways and Iberia are the top three most popular airlines that fly to London from Colorado according to our data. United Airlines is the first choice among our users, with 48% of people opting to fly with this airline when traveling to London. Keep in mind that there are 13 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

How many flights depart from Colorado to London on average per week?

The number of flights available between Colorado and London is 77 per week as of December 2025. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.

When did momondo last update prices for flights from Colorado to London?

Prices for flights from Colorado to London refresh daily.

How many operators does momondo search for flights from Colorado to London?

As of December 2025, there are 13 operators available to choose from for flights from Colorado to London.

How old do you have to be to fly from Colorado to London?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Colorado to London.

What documentation or ID do you need to fly to London?

The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$353 Cheap Flights from Colorado to London in 2025/26

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Find the cheapest flights from Colorado to London

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

1:25 pm - 9:40 am

COS

LHR

13h 15m1 stop

8:15 pm - 5:23 pm

LHR

COS

28h 08m2 stops

$570Lufthansa

Fri, Jan 30 - Fri, Feb 6

1:38 pm - 9:40 am

GJT

LHR

13h 02m1 stop

10:25 am - 8:18 pm

LHR

GJT

16h 53m2 stops

$589Lufthansa

Sat, Jan 31 - Sat, Feb 7

5:50 am - 7:10 am

COS

LHR

18h 20m2 stops

7:40 am - 5:23 pm

LHR

COS

16h 43m2 stops

$623Multiple Airlines

Sat, Jan 31 - Sat, Feb 7

11:29 am - 11:05 am

GJT

LHR

16h 36m2 stops

6:35 am - 8:18 pm

LHR

GJT

20h 43m2 stops

$633United Airlines

Sat, Jan 31 - Sat, Feb 7

11:05 am - 6:30 am

DEN

LHR

12h 25m1 stop

7:25 am - 2:20 pm

LHR

DEN

13h 55m1 stop

$633United Airlines

Wed, Apr 15 - Thu, Apr 30

8:28 am - 10:00 am

DEN

LGW

18h 32m2 stops

2:00 pm - 8:30 am

LGW

DEN

25h 30m1 stop

$633Multiple Airlines

Thu, Jan 15 - Thu, Jan 22

1:25 pm - 5:50 pm

DEN

LGW

22h 25m2 stops

6:35 pm - 9:25 pm

LGW

DEN

33h 50m2 stops

$634SWISS

Tue, Mar 24 - Mon, Mar 30

7:00 am - 10:10 am

MTJ

LHR

20h 10m2 stops

2:30 pm - 2:32 pm

LHR

MTJ

31h 02m2 stops

$634Air Canada

Wed, Jan 28 - Sun, Feb 1

11:15 am - 7:10 am

DEN

LHR

13h 55m1 stop

11:05 am - 7:55 pm

LHR

DEN

38h 50m2 stops

$634Air Canada

Sun, Mar 15 - Mon, Mar 23

11:20 am - 1:00 pm

DEN

LHR

18h 40m2 stops

8:05 pm - 8:13 pm

LHR

DEN

31h 08m2 stops

$638SWISS

Sun, Jan 18 - Thu, Jan 29

Lufthansa flights from Colorado to London

Our best Lufthansa deals on Colorado to London flight tickets

Lufthansa

Jan 30

COS1:25 pmColorado Springs

13h 15m

1 stop

LHR9:40 amLondon Heathrow

Feb 6

LHR8:15 pmLondon Heathrow

28h 08m

2 stops

COS5:23 pmColorado Springs

$570

Find similar

Lufthansa

Jan 31

GJT1:38 pmGrand Junction Regnl

13h 02m

1 stop

LHR9:40 amLondon Heathrow

Feb 7

LHR10:25 amLondon Heathrow

16h 53m

2 stops

GJT8:18 pmGrand Junction Regnl

$589

Find similar

Lufthansa

Jan 13

COS1:25 pmColorado Springs

13h 15m

1 stop

LHR9:40 amLondon Heathrow

Jan 20

LHR11:35 amLondon Heathrow

13h 43m

1 stop

COS6:18 pmColorado Springs

$601

Find similar

British Airways flights from Colorado to London

Our best British Airways deals on Colorado to London flight tickets

British Airways

Jan 21

COS10:21 amColorado Springs

16h 39m

1 stop

LHR10:00 amLondon Heathrow

Jan 25

LHR7:15 pmLondon Heathrow

32h 42m

2 stops

COS8:57 pmColorado Springs

$636

Find similar

British Airways

Feb 12

COS1:43 pmColorado Springs

14h 57m

1 stop

LHR11:40 amLondon Heathrow

Feb 20

LHR3:00 pmLondon Heathrow

14h 08m

1 stop

COS10:08 pmColorado Springs

$655

Find similar

British Airways

Mar 25

DEN6:25 pmDenver Intl

9h 10m

LHR9:35 amLondon Heathrow

Apr 2

LHR1:35 pmLondon Heathrow

9h 55m

DEN4:30 pmDenver Intl

$658

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Colorado SpringsLondon

COS - LHR

COSLHR

Colorado Springs

Fri 1/30

1:25 pm-9:40 am

1 stop13h 15m

London Heathrow

Fri 2/6

8:15 pm-5:23 pm

2 stops28h 08m

$570

Grand JunctionLondon

GJT - LHR

GJTLHR

Grand Junction Regnl

Sat 1/31

1:38 pm-9:40 am

1 stop13h 02m

London Heathrow

Sat 2/7

10:25 am-8:18 pm

2 stops16h 53m

$589

Colorado SpringsLondon

COS - LHR

COSLHR

Colorado Springs

Sat 1/31

5:50 am-7:10 am

2 stops18h 20m

London Heathrow

Sat 2/7

7:40 am-5:23 pm

2 stops16h 43m

$623

Grand JunctionLondon

GJT - LHR

GJTLHR

Grand Junction Regnl

Sat 1/31

11:29 am-11:05 am

2 stops16h 36m

London Heathrow

Sat 2/7

6:35 am-8:18 pm

2 stops20h 43m

$633

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 4/15

11:05 am-6:30 am

1 stop12h 25m

London Heathrow

Thu 4/30

7:25 am-2:20 pm

1 stop13h 55m

$633

DenverLondon

DEN - LGW

DENLGW

Denver Intl

Thu 1/15

8:28 am-10:00 am

2 stops18h 32m

London Gatwick

Thu 1/22

2:00 pm-8:30 am

1 stop25h 30m

$633

DenverLondon

DEN - LGW

DENLGW

Denver Intl

Tue 3/24

1:25 pm-5:50 pm

2 stops22h 25m

London Gatwick

Mon 3/30

6:35 pm-9:25 pm

2 stops33h 50m

$634

MontroseLondon

MTJ - LHR

MTJLHR

Montrose County

Wed 1/28

7:00 am-10:10 am

2 stops20h 10m

London Heathrow

Sun 2/1

2:30 pm-2:32 pm

2 stops31h 02m

$634

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Sun 3/15

11:15 am-7:10 am

1 stop13h 55m

London Heathrow

Mon 3/23

11:05 am-7:55 pm

2 stops38h 50m

$634

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Sun 1/18

11:20 am-1:00 pm

2 stops18h 40m

London Heathrow

Thu 1/29

8:05 pm-8:13 pm

2 stops31h 08m

$638

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Colorado to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to London?

The cheapest month to fly to London from Colorado is in October. Flight prices, which tend to average around $650, are often lower during this time because this is during the off-season. The month of February is another great option to travel to London, with average flight prices from Colorado averaging around $666.

What is the cheapest day to depart on your flight to London?

The cheapest day to depart from Colorado to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $761. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $879. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

What is the cheapest time of day to depart on your flight to London?

Flying to London from Colorado at noon is the least expensive time of day to depart. momondo users have found prices as low as $750 when looking at flights departing at noon. Flights to London are more costly in the evening, with an average ticket price of $891. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Colorado to London flight route?

Fly from Denver Intl to London Heathrow for the best Colorado - London flight prices

How far in advance should I book a flight to London?

You are more likely to see cheaper flights to London from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $786 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Colorado for as low as $714 on momondo.

What cabin class options are available on Colorado to London flights?

There are 4 cabin classes available to choose from on Colorado to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Colorado to London flights?

You could potentially save up to 36% on your flight if you consider stops on a Colorado to London flight.

Cheap Colorado to London flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to London

Best Price Found	$394
Fastest flight time	8h 55m
Direct flights	Every day
Airports in London	6 airports

The best one-way flight to London from Colorado in the past 72 hours is $394. The best round-trip flight deal from Colorado to London found on momondo in the last 72 hours is $649.

The fastest flight from Colorado to London takes 8h 55m

Direct flights go from Colorado to London every day.

There are 6 airports in London. From Colorado there are direct flights to London Heathrow (LHR).

Search flight deals

When did momondo last update prices for flights from Colorado to London?
Prices for flights from Colorado to London refresh daily.
How many operators does momondo search for flights from Colorado to London?
As of December 2025, there are 13 operators available to choose from for flights from Colorado to London.
How old do you have to be to fly from Colorado to London?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Colorado to London.
What documentation or ID do you need to fly to London?
The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Colorado to London?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Colorado to London is Boeing 787 Dreamliner (33.86% of total bookings). The next most popular plane models are Boeing 777 (23.87%), Airbus A350-1000 (23.04%), and Boeing 787-9 Dreamliner (17.17%).

Best airlines flying from Colorado to London

Compare and see reviews for airlines that fly from Colorado to London with momondo

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $101	Free Cancellation	Rating 7.2 2,896 reviews	Search JetBlue flights
Icelandair	PriceFrom $469	Free Cancellation	Rating 7.0 591 reviews	Search Icelandair flights
British Airways	PriceFrom $515	Free Cancellation	Rating 6.7 7,585 reviews	Search British Airways flights
American Airlines	PriceFrom $551	Free Cancellation	Rating 7.2 11,054 reviews	Search American Airlines flights
Aer Lingus	PriceFrom $569	Free Cancellation	Rating 7.2 1,395 reviews	Search Aer Lingus flights
United Airlines	PriceFrom $571	Free Cancellation	Rating 7.4 9,091 reviews	Search United Airlines flights
Iberia	PriceFrom $573	Free Cancellation	Rating 7.0 3,050 reviews	Search Iberia flights
Virgin Atlantic	PriceFrom $580	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
Delta	PriceFrom $584	Free Cancellation	Rating 7.9 8,005 reviews	Search Delta flights
Finnair	PriceFrom $620	Free Cancellation	Rating 7.6 1,338 reviews	Search Finnair flights

Gatwick

Hounslow

Milton Keynes

Dover

Luton

Slough

Guildford

Hayes

Dartford

Crawley

Brentwood

Wembley

Watford

Ilford

Cobham

Folkestone

Romford

Richmond

Uxbridge

Stansted

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to London?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Colorado.

Can I find flights from Colorado to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from Colorado which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Colorado to London?

momondo helps you find the best flight between Colorado and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Colorado to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Colorado are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.