Is United Airlines the cheapest airline to fly with from London to Denver?

With an average price of £888 return, United Airlines is not the cheapest airline to fly from London to Denver with. Instead, for the lowest price, our data suggests flying with Icelandair, where a return flight costs £711 on average.

What is the cheapest United Airlines flight from London to Denver?

In the last 3 days, the lowest price for a flight with United Airlines from London to Denver was £459 for a return flight and £711 for a one-way flight.

Does United Airlines fly direct to Denver from London?

Yes, United Airlines does offer direct flights for the route, with around 14 flights per week.

What’s the cheapest day of the week to fly from London to Denver with United Airlines?

On average, the cheapest day of the week to fly from London to Denver with United Airlines is Thursday, when prices are around £799. The most expensive day is generally Tuesday, when the average price is around £1,614.

£484 Cheap United Airlines Flights from London to Denver

Flights Deals

Cheap United Airlines Flight Deals from London to Denver

Here are some of the best deals found on KAYAK recently from United Airlines for return flights from London to Denver 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.

Round-trip

One-way

Last minute

Direct

Recent return United Airlines flight deals from London to Denver

KAYAK's recommended return flight United Airlines deals departing in the coming months from London to Denver.

Discover the best prices for you by selecting your travel dates on KAYAK.

07:25 - 18:40LHR-DEN

18h 15m1 stop

23:59 - 20:40DEN-LHR

13h 41m1 stop

£484United Airlines

Find Deal

Mon, 12 May - Mon, 19 May

07:25 - 18:40LHR-DEN

18h 15m1 stop

05:20 - 10:25DEN-LHR

22h 05m1 stop

£485United Airlines

Find Deal

Tue, 13 May - Tue, 20 May

07:25 - 13:45LHR-DEN

13h 20m1 stop

11:25 - 21:00DEN-LHR

50h 35m2 stops

£488United Airlines

Find Deal

Fri, 5 Sep - Fri, 19 Sep

09:30 - 18:18LHR-DEN

15h 48m1 stop

20:20 - 12:20DEN-LHR

9h 00mdirect

£500United Airlines

Find Deal

Sat, 13 Sep - Sat, 20 Sep

12:40 - 23:11LHR-DEN

17h 31m2 stops

13:25 - 11:10DEN-LHR

14h 45m1 stop

£503United Airlines

Find Deal

Thu, 15 May - Fri, 23 May

11:25 - 14:10LHR-DEN

9h 45mdirect

23:59 - 20:40DEN-LHR

13h 41m1 stop

£509United Airlines

Find Deal

Mon, 12 May - Mon, 19 May

07:25 - 13:45LHR-DEN

13h 20m1 stop

20:20 - 12:20DEN-LHR

9h 00mdirect

£529United Airlines

Find Deal

Thu, 15 May - Sun, 1 Jun

09:30 - 15:35LHR-DEN

13h 05m1 stop

08:02 - 07:25DEN-LHR

16h 23m1 stop

£531United Airlines

Find Deal

Fri, 9 May - Mon, 2 Jun

07:25 - 18:40LHR-DEN

18h 15m1 stop

07:45 - 21:00DEN-LHR

30h 15m2 stops

£535United Airlines

Find Deal

Thu, 15 May - Sun, 1 Jun

06:50 - 23:12LHR-DEN

23h 22m2 stops

08:02 - 07:25DEN-LHR

16h 23m1 stop

£537United Airlines

Find Deal

Fri, 16 May - Sat, 31 May

Useful Info

Low season	March
High season	September
Cheapest flight	£484
Average price round-trip	£560

Best time to beat the crowds (14% less expensive on average)

Most popular time to fly and prices are also 12% lower on average.

Flight from London Heathrow Airport to Denver

(price for this month)

When to Book Flights with United Airlines from London to Denver

Average price per month

Flight prices as travel date approaches

Is United Airlines the cheapest airline to fly with from London to Denver?
With an average price of £888 return, United Airlines is not the cheapest airline to fly from London to Denver with. Instead, for the lowest price, our data suggests flying with Icelandair, where a return flight costs £711 on average.
What is the cheapest United Airlines flight from London to Denver?
In the last 3 days, the lowest price for a flight with United Airlines from London to Denver was £459 for a return flight and £711 for a one-way flight.
Does United Airlines fly direct to Denver from London?
Yes, United Airlines does offer direct flights for the route, with around 14 flights per week.
What’s the cheapest day of the week to fly from London to Denver with United Airlines?
On average, the cheapest day of the week to fly from London to Denver with United Airlines is Thursday, when prices are around £799. The most expensive day is generally Tuesday, when the average price is around £1,614.

7.4

GoodBased on 8,696 verified guest reviews

6.6Food

7.3Comfort

7.7Boarding

7.1Entertainment

8.1Crew

Pros +

Cons -

Show reviews that mention

10.0 Wonderful

David, Apr 2025

DEN-FLL

No issues, great flight, great crew

10.0 Wonderful

Vincenzo, Apr 2025

IAD-TYS

Friendly crew, all very smooth

8.0 Very Good

Vincenzo, Apr 2025

FRA-IAD

Crew friendly and efficient. Nobody seated next to me

2.0 Poor

Brant, Apr 2025

YHZ-EWR

Our flights got changed from United to Air Canada and our purchased seats did not get transferred so we had to pay for seats twice. I brought it up with Air Canada and they stated I had to go back and chase it with United. The united seats were $21 Canadian each and Air Canada were $56 each so we have paid $77 for each seat. Very unhappy

10.0 Wonderful

Verified traveller, Apr 2025

SFO-HKG

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

8.0 Very Good

Verified traveller, Apr 2025

ORD-SFO

A bit rush for transit. Food and entertainment are not available

8.0 Very Good

Verified traveller, Apr 2025

YUL-ORD

So far so good but food and entertainment are not available for this flight

10.0 Wonderful

Dr. Joseph, Apr 2025

ORD-YUL

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

8.0 Very Good

Leslie, Apr 2025

SFO-BOS

Good

8.0 Very Good

Verified traveller, Apr 2025

YYC-DEN

Was all good

Everything you need to know for your flight from London to Denver

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LON - DEN

£484 Find Cheap United Airlines Flights from London to Denver

Search hundreds of travel sites at once for deals on United Airlines flights from London to Denver

Cheap United Airlines Flight Deals from London to Denver

Recent return United Airlines flight deals from London to Denver

Recent one-way United Airlines flight deals from London to Denver

Recent last minute United Airlines flight deals from London to Denver

Recent direct United Airlines flight deals from London to Denver

Good to know

Low season

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Average price round-trip

When to Book Flights with United Airlines from London to Denver

FAQs for flying to Denver with United Airlines

Is United Airlines the cheapest airline to fly with from London to Denver?

What is the cheapest United Airlines flight from London to Denver?

Does United Airlines fly direct to Denver from London?

What’s the cheapest day of the week to fly from London to Denver with United Airlines?

United Airlines Customer Reviews

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Everything you need to know for your flight from London to Denver

Other airlines flying from London to Denver

Flight deals from the most popular airlines with KAYAK users flying the route

Cabin class types available on flights to Denver

Cabin classes available on flights to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Complete your trip to Denver with a hotel stay or car hire

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The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability are not guaranteed.

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Top United Airlines flights

The most popular destinations for flights with United Airlines according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.