HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$262+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — LHR
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Colorado to Heathrow

Keep the following information in mind while searching for Colorado to Heathrow flight deals. Data was last updated August 2, 2025.

Round-trip from

$516
(SWISS)

One-way from

$262
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$722

Good round-trip deal

$583 or less

Good one-way deal

$398 or less
From Colorado to London Heathrow
Search Deals
One-way flight from Colorado to London Heathrow
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($203 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
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

Find 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 August 2, 2025.

This SWISS deal was found by Cheapflights users on 7/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/15:50 pmDEN - LHR
1 stop18h 30mSWISS
Wed 9/106:00 amLHR - DEN
1 stop17h 20mSWISS
Deal found 7/31$516
This United deal was found by Cheapflights users on 7/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/139:40 amDEN - LHR
1 stop17h 20mMultiple Airlines
Thu 8/215:50 pmLHR - DEN
2 stops31h 30mMultiple Airlines
Deal found 7/31$517
This Gurufare deal was found by Cheapflights users on 8/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/43:40 pmDEN - LHR
1 stop12h 10mIcelandair
Wed 11/1212:15 pmLHR - DEN
1 stop12h 50mIcelandair
Deal found 8/1$518
This Gurufare deal was found by Cheapflights users on 7/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/216:35 pmDEN - LHR
Nonstop9h 00mBritish Airways
Tue 9/303:30 pmLHR - DEN
1 stop13h 46mBritish Airways
Deal found 7/29$519
This Delta deal was found by Cheapflights users on 7/31. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/197:20 amDEN - LHR
1 stop18h 55mDelta
Tue 8/269:00 amLHR - DEN
2 stops17h 55mDelta
Deal found 7/31$522
This Austrian Airlines deal was found by Cheapflights users on 8/1. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/51:25 pmDEN - LHR
2 stops37h 10mAustrian Airlines
Thu 10/162:05 pmLHR - DEN
2 stops33h 19mAustrian Airlines
Deal found 8/1$527
This Gurufare deal was found by Cheapflights users on 8/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:35 pmDEN - LHR
Nonstop9h 05mLufthansa
Mon 9/225:50 pmLHR - DEN
1 stop26h 55mLufthansa
Deal found 8/1$528
This Iberia deal was found by Cheapflights users on 7/29. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:06 pmDEN - LHR
1 stop14h 19mIberia
Tue 9/309:15 amLHR - DEN
1 stop16h 21mIberia
Deal found 7/29$530
This United Airlines deal was found by Cheapflights users on 8/1. 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.
Sun 9/289:40 amDEN - LHR
1 stop13h 50mUnited Airlines
Mon 10/63:30 pmLHR - DEN
1 stop31h 05mUnited Airlines
Deal found 8/1$540
This Gurufare deal was found by Cheapflights users on 8/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/79:40 amDEN - LHR
2 stops24h 25mBrussels Airlines
Fri 9/196:50 amLHR - DEN
2 stops18h 28mBrussels Airlines
Deal found 8/1$544
This Air Canada deal was found by Cheapflights users on 8/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1411:49 amDEN - LHR
1 stop17h 01mAir Canada
Tue 11/189:00 amLHR - DEN
2 stops17h 55mAir Canada
Deal found 8/1$546
This Travelocity deal was found by Cheapflights users on 7/31. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/107:55 pmDEN - LHR
1 stop15h 25mAer Lingus
Thu 10/168:50 amLHR - DEN
1 stop16h 09mAer Lingus
Deal found 7/31$554

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 August 2, 2025.
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

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Mon 9/1

5:50 pm-7:20 pm

1 stop18h 30m

London Heathrow

Wed 9/10

6:00 am-4:20 pm

1 stop17h 20m

$516

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 8/13

9:40 am-10:00 am

1 stop17h 20m

London Heathrow

Thu 8/21

5:50 pm-6:20 pm

2 stops31h 30m

$517

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Mon 9/22

7:45 am-6:30 am

2 stops15h 45m

London Heathrow

Tue 10/14

6:50 am-4:24 pm

2 stops16h 34m

$518

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Sun 9/21

6:35 pm-10:35 am

Nonstop9h 00m

London Heathrow

Thu 10/2

12:15 pm-6:33 pm

1 stop13h 18m

$519

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 8/27

6:08 am-10:25 am

1 stop21h 17m

London Heathrow

Wed 9/3

11:25 am-2:10 pm

Nonstop9h 45m

$520

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 9/3

12:00 pm-11:20 am

1 stop16h 20m

London Heathrow

Fri 9/12

6:15 am-3:44 pm

2 stops16h 29m

$521

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Sun 10/5

1:25 pm-9:35 am

2 stops37h 10m

London Heathrow

Wed 10/15

12:40 pm-4:24 pm

2 stops34h 44m

$527

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 9/10

5:35 pm-9:40 am

Nonstop9h 05m

London Heathrow

Mon 9/22

5:50 pm-1:45 pm

1 stop26h 55m

$528

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Wed 9/24

5:06 pm-2:25 pm

1 stop14h 19m

London Heathrow

Thu 10/2

2:25 pm-9:03 pm

1 stop13h 38m

$530

DenverLondon

DEN - LHR

DENLHR

Denver Intl

Thu 9/4

4:40 pm-11:55 am

1 stop12h 15m

London Heathrow

Sun 9/7

9:25 pm-6:55 pm

1 stop28h 30m

$535

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 46 results
1
2
3
...
5

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, November is the cheapest month in which you can book a flight from Colorado to London Heathrow Airport (average of $661). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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 August 2, 2025.

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 August 2, 2025.

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 to fly round-trip from Colorado to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated August 2, 2025.
Read through reviews of airlines operating flights from Colorado to London Heathrow Airport, such as Delta, Austrian Airlines, and SWISS. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,983 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
823 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,904 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,983 reviews

Food

7.3

Overall

8.0

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines to fly from Colorado to London Heathrow Airport one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $308. However, be on the lookout for offers from Icelandair and JetBlue, 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 Durango La Plata County - 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: Air Canada (68%), Austrian Airlines (68%), Brussels Airlines (68%).

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

    Looking at all options, your cheapest flight can be booked for $381. While the most popular route (Denver Intl - London Heathrow) can be booked for $481 on average our data indicates $2,019 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, November is the cheapest month in which you can book a flight from Colorado to London Heathrow Airport (average of $661). Flying from Colorado to London Heathrow Airport in June is currently the most expensive (average of $1,097). 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
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Dartford
Broadway
Aylesbury
Chelmsford
Folkestone
Southend-on-Sea
Chichester
Swindon

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Colorado to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to London City flights
John F Kennedy Intl to Gatwick flights
Newark to Gatwick flights
LaGuardia to Heathrow flights
Newark to London City flights
LaGuardia to Gatwick flights
John F Kennedy Intl to Stansted flights
Newark to Stansted flights
John F Kennedy Intl to Luton flights
Boston to Heathrow flights
Los Angeles to Heathrow flights
Dulles Intl to Heathrow flights
O'Hare Intl to Heathrow flights
Newark to Luton flights
Baltimore to Heathrow flights
Dallas/Fort Worth to Heathrow flights
San Francisco to Heathrow flights
Seattle to Heathrow flights
Boston to Gatwick flights
Miami to Heathrow flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
LaGuardia to Stansted flights
Boston to London City flights
Hobby to Heathrow flights
Denver to Heathrow flights
Orlando to Heathrow flights
Atlanta to Heathrow flights
Philadelphia to Heathrow flights
O'Hare Intl to Gatwick flights
Dulles Intl to London City flights
O'Hare Intl to London City flights
Los Angeles to London City flights
Baltimore to Gatwick flights
George Bush Intcntl to Heathrow flights
Reagan-National to Gatwick flights
Dallas/Fort Worth to Gatwick flights
LaGuardia to Luton flights
Los Angeles to Gatwick flights
San Francisco to Gatwick flights
Minneapolis to Heathrow flights
San Francisco to London City flights
Seattle to Gatwick flights
Orlando to Gatwick flights
Tampa to Heathrow flights
Sky Harbor Intl to Heathrow flights
Dulles Intl to Stansted flights
O'Hare Intl to Stansted flights

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 August 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$101Average$678FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$472Average$571FlexibilityNo cancel feeOn-time76%
IberiaCheapest$574Average$685FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$580Average$698FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$581Average$818FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$581Average$837FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$585Average$796FlexibilityNo cancel feeOn-time71%
DeltaCheapest$587Average$947FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$587Average$764FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$596Average$974FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.