£392 Find Cheap Flights from London Heathrow Airport to Colorado

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Heathrow to Colorado departing on 21/4. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Colorado

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Colorado.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from London to Colorado.
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Flight Deals

Cheap Flights from Heathrow to Colorado

Cheapest return prices found by our users on KAYAK in the last 72 hours
Denver
Denver1 stop£462
Aspen
Aspen1 stop£936
Montrose
Montrose2 stops£889
Durango
Durango2 stops£862
Grand Junction
Grand Junction2 stops£861
Denver
Denver1 stop£462
Aspen
Aspen1 stop£936
Montrose
Montrose2 stops£889
Durango
Durango2 stops£862
Grand Junction
Grand Junction2 stops£861

Book Cheap Heathrow to Colorado Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Heathrow to Colorado that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from Heathrow to Colorado

Thu, 30 Apr - Sat, 2 May
United Airlines Logo
16:40 - 19:29
LHR
-
DEN
33h 49m
1 stop
United Airlines Logo
17:25 - 10:10
DEN
-
LHR
33h 45m
1 stop
£462United Airlines
Thu, 30 Apr - Sat, 2 May
United Airlines Logo
16:40 - 19:29
LHR
-
DEN
33h 49m
1 stop
United Airlines Logo
19:05 - 10:10
DEN
-
LHR
32h 05m
1 stop
£464United Airlines
Wed, 29 Apr - Sun, 3 May
British Airways Logo
13:35 - 16:20
LHR
-
DEN
9h 45mdirect
British Airways Logo
18:40 - 10:35
DEN
-
LHR
8h 55mdirect
£508British Airways
Sun, 28 Jun - Sun, 5 Jul
Icelandair Logo
21:25 - 12:40
LHR
-
DEN
22h 15m
1 stop
Icelandair Logo
20:10 - 11:55
DEN
-
LHR
32h 45m
1 stop
£511Icelandair
Wed, 8 Apr - Wed, 3 Jun
Icelandair Logo
21:25 - 19:00
LHR
-
DEN
28h 35m
1 stop
Icelandair Logo
20:10 - 20:20
DEN
-
LHR
17h 10m
1 stop
£520Icelandair
Wed, 29 Apr - Wed, 6 May
British Airways Logo
16:25 - 09:27
LHR
-
COS
24h 02m
1 stop
British Airways Logo
13:39 - 10:55
COS
-
LHR
14h 16m
1 stop
£850British Airways
Wed, 29 Apr - Wed, 6 May
Lufthansa Logo
09:30 - 18:33
LHR
-
COS
16h 03m
2 stops
Lufthansa Logo
07:45 - 05:55
COS
-
LHR
15h 10m
2 stops
£855Lufthansa
Mon, 27 Apr - Mon, 4 May
Lufthansa Logo
09:30 - 20:39
LHR
-
DRO
18h 09m
2 stops
Lufthansa Logo
13:35 - 06:55
DRO
-
LHR
34h 20m
2 stops
£862Lufthansa
Mon, 1 Jun - Tue, 9 Jun
American Airlines Logo
11:10 - 11:02
LHR
-
ASE
30h 52m
1 stop
American Airlines Logo
12:51 - 06:15
ASE
-
LHR
34h 24m
2 stops
£936American Airlines
Tue, 2 Jun - Tue, 9 Jun
American Airlines Logo
08:55 - 20:18
LHR
-
ASE
18h 23m
1 stop
American Airlines Logo
12:51 - 10:55
ASE
-
LHR
15h 04m
1 stop
£999American Airlines
Booking Insights

KAYAK's insights & trends for Heathrow to Colorado flights

Get data-powered insights and trends into flights from Heathrow to Colorado to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest London Heathrow Airport to Colorado flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Colorado from London Heathrow Airport found in the last 72 hours was to Denver, at £419 return. The most popular route is from London Heathrow Airport (LHR) to Denver (DEN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was £419.

What is the cheapest time of day to fly to Colorado?

The average price for all round-trip flights from London Heathrow Airport to Colorado depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Colorado is generally in the morning, when retur flights cost £643 on average. The most expensive time of day to fly to Colorado is generally in the afternoon, which is peak travel time and where the average cost of a ticket is £669.

Can I save money by flying with a stopover from London Heathrow Airport to Colorado?

The average return price for all direct flights, flights with one stopover, and flights with two stopovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of £691, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from London Heathrow Airport to Colorado?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from London Heathrow Airport to Colorado, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from London Heathrow Airport to Colorado is September, when tickets cost £493 (return) on average. On the other hand, the most expensive months are July and December, when the average cost of return tickets is £736 and £715 respectively.

What’s the cheapest day of the week to fly from London Heathrow Airport to Colorado?

The average price of all round-trip flights from London Heathrow Airport to Colorado clicked on KAYAK for each day over the last 12 months.

For London Heathrow Airport to Colorado, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Colorado back to London Heathrow Airport, the best deals are generally found on Wednesday, with Saturday being the most expensive.

How far in advance should I book a flight from London Heathrow Airport to Colorado?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from London Heathrow Airport to Colorado, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below-average price on a flight from London Heathrow Airport to Colorado, you should book around 2 weeks before departure, which saves you about 34% compared to booking last-minute. For the absolute cheapest price, our data suggests you should book 12 weeks before departure.

Good to know - Cheap tickets from London Heathrow Airport to Colorado

Low seasonJanuary
Cheapest flight£392
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly and prices are also 18% lower on average.
Flight from London Heathrow Airport to Denver

FAQs - booking Colorado flights

  • How does KAYAK find such low prices on flights from London Heathrow Airport to Colorado?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from London Heathrow Airport to Colorado.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from London Heathrow Airport to Colorado?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from London Heathrow Airport to Colorado is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from London Heathrow Airport to Colorado?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly from London Heathrow Airport to Colorado with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from London Heathrow Airport to Colorado?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from London Heathrow Airport to Colorado up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines flying from Heathrow to Colorado

 
See real verified KAYAK customer reviews for airlines flying from London to Colorado. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Heathrow to Colorado? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
Austrian AirlinesOverall score based on 901 reviews
7.6Boarding
6.8Entertainment
6.8Food
8.1Crew
7.3Comfort
Airline reviews

My Austrian Air flight from Montenegro to Vienna was delayed by three hours because their plane de-icer was broken and they had to wait for the sun to come up before the ice could melt. This meant we missed our United flight altogether. So I can't speak about United, but I was not impressed by Austrian Air. They made us check in two carry on bags for a 60% full flight, and the bags didn't find us in the US for ten days. The re-routing they arranged included an extra leg, a midnight taxi ride across New Jersey and New York, and a five hour sleep in a hotel. Not impressed.

2.0 MediocreNate, Jan 2026
GSP - IAD
Read more Austrian Airlines reviews

My Austrian Air flight from Montenegro to Vienna was delayed by three hours because their plane de-icer was broken and they had to wait for the sun to come up before the ice could melt. This meant we missed our United flight altogether. So I can't speak about United, but I was not impressed by Austrian Air. They made us check in two carry on bags for a 60% full flight, and the bags didn't find us in the US for ten days. The re-routing they arranged included an extra leg, a midnight taxi ride across New Jersey and New York, and a five hour sleep in a hotel. Not impressed.

Most of the crew members were rude, flight arrived late and we missed our connecting flight, they damaged my friends suitcase so badly that two wheels had been destroyed.

Excellent flight. The crew was exceptionally attentive and organized. Attention to details is unmatched.

Loved the courtesy and punctuality. Very professional and most importantly on time.

Great! They got my vegetarian meal right, flight was comfortable, they helped store my heavy luggage. Pleasant crew and flight staff.

I did wish they would give us the entire little bottle Bailey's instead of just have 1/2 bottle at a time

Very limited legroom in a 10 hour flight.very old plane.

They had me unpack a handbag 2 lbs overweight into another handbag 8 lbs underweight for a Bible.

Accessibility serious problems in Viena airport making it seriousely difficult in in-between gates and boarding travel. Pretens of breakfast and service care in the economy pathetic.

One thing I really liked about Austrian Airlines was that the flight attendants were very kind, and the in-flight entertainment offered many choices. One thing that could be improved is the meal service, since only a vegetarian option was offered — it would be better to have at least two choices

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

It’s always a great time flying with united airlines.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

As great a red-eye flight as red-eye flights can be.

Both of my flights arrived early and check in process was smooth

Everything was on time Will use united again for sure

I just think it’s unfortunate that Airlines have completely abandoned the idea of serving any kind of decent or even real food on flights, not even on a four hour flight!? Those days are gone, I guess.

The flight was delayed by two de-icings. The seatbelt did not work correctly. It did not stay tight.

Hotter than Hades in August. Why, why do crews think that in the winter when we are already dressed for cold weather we need a cabin that is 82 degrees. Even the vents were blowing hot air.

Iceland Air severely damaged a checked bag. Additionally, the gate agent caused issues for many passengers who had standard-sized onboard bags that would have passed inspection by any other airline.

Nice, quick flight. There were lots of empty seats so they told me I could sit next to the emergency exit where I would have more legroom.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

Overall satisfied and would fly with them again. They could improve the check-in efficiency at BOS, we got backed up because it seemed there were passengers requiring much more time for check in.

The customer service was unbeatable from the wheelchair assist team to the flight attendants. The pilot also did an excellent job managing the turbulence.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

The Experience Was Torture Spend a few extra dollars and avoid Icelandair at all costs. There is absolutely no refreshments, no food, no drinks. Only water, coffee, tea are free and at only half a tiny cup. Entertainment is limited selection of films, shows and mostly outdated. The seats are smaller than usual, with no cushion, no pillows, no blankets. First time in my life have I witness an airline asking for donations in spare change for a charity. With all the money Icelandair saves by starving the passenger, they can afford to give this charity on their own.

Again, we paid $ 328.00 for specific seats are were assigned those seats.

Never again. Terrible hospitality and human decency for an international flight. No food, no snacks, no beverages, blankets, pillows, limited entertainment. Tiny seats without any cushion and some do not even recline. I was shocked that they did not charge for seat belts. Never in my life have I witness asking for "spare change" for charity before landing on both legs of the flight. Icelandair can contribute on their own to said, so called, children's charity with the money saved from providing 3 centimeters of tea and water to hungry and dehydrated passengers.

Flight map did not work. Crew was great, food was good, plane took off on time and landed early. That's all I can ask.

Paid for exit row at the back of the plane. Window seat with lots of leg space. Food was inedible (as usual). Brought my own.

Lufthansa is turning into a budget airline. On transfers, the luggage never arrives if you have less than 2 hours for the transfer. This is happened to me multiple times when I end up on flights serviced by Lufthansa. The first leg of the flight was serviced by Discover Airlines. It was a 3-hour flight and they only offer a glass of water. Everything else is for purchase. I purchased my ticket as economy which should have included a bag but it ended up booking as economy light so I had to pay for a bag in each direction.

The food that was served was superb!!! Awesome snacks!!! Frequent drink service!!! To me, this was shocking. I took a British Airways flight from Denver to London for the first leg of my trip and the food was horrendous. Thank you for keeping us fed and satiated on such a long flight!!!!

The plane was late (as was my flight out from Birmingham the day before)

It was freezing. I asked crew member for a blanket and was told it might be in front of plane but I never got one. I turned off all the vents but still froze.

The flight was delayed by an hour. Made the connection uncomfortably tight.

When we went to the lounge they told us to go into the main lounge and not the full business class section, later they told me that Lufthansa wont pay the full fee to alloq the business class passengers entry to the nicer sectikn where all the other airlines nusiness class passengers go into. Very poor arrangement.

Not what I expected for the last leg of a $5100 business class experience. Boarding was a nightmare. The flight was delayed and I had to keep checking my email to ensure I was at the right gate since the airline or the terminal had no clue until 15 mins prior to boarding. Food was gross, limited drink options.

My flight was delayed d the gate was never updated inside the terminal. If I hadn’t checked my email I would have missed my flight. Also, I paid a total of $5100 for my flight to be. Business or first class. My final leg of my flight from Heathrow to Frankfurt was not to standard of what I expected or experienced in the previous legs of my trip.

Late takeoff, but on time landing. Lost bags, 3 days to find them, still in transit to my location. Power outlets broken, Wi-Fi not working, so much for working on the long flight.

Good. For a long flight. The comfort of the seat could be better. Also, the food was « normal » plane food. Not indian plane food unfortunately! Everything else was smooth and great.

The seats were comfortable. So many empty seats allowed for stretching out and sleeping. The onboard entertainment was pretty good. The cabin crew were so kind and kept the passengers well- hydrated, and well fed.

We had American Airlines on our return and it was confusing if we were going with Aa or BA I had 2 different flight numbers and didn’t get our gate until it was boarding. So we were a bit nervous as the which it was

My touch screen at my seat wasn't working, the films BA advertised on the website for this flight were not available, and the plane was a little dated, food was good and the staff were good, just let down by the aircraft facilities.

Did not like the seating configuration at all with 2+3+2 in business class. Lacking total privacy and comfort

Check-in experience, for business call please provide a premium experience

Lost my luggage, ran out of food choices in business class, ground crew was completely unapologetic.

Excellent. The crew and flight were great. Checking in was easy and everyone was very helpful.

Entertainment devices on A380 need to be fixed, the seats might do with updates.

Everything you need to know for your flight from Heathrow to Colorado

Information on your arrival and departure airports