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Find cheap United Airlines flights to Denver

CMH — DEN
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags

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Cheapest United Airlines flights from United Kingdom to Denver
Explore the most affordable United Airlines flight options available from United Kingdom to Denver. Find the lowest fares with prices last updated on 27 July 2026.

Mon 24/810:50
LHR
-
DEN
1 stop15h 00m
United Airlines
Mon 7/923:59
DEN
-
LHR
1 stop13h 41m
United Airlines
Deal found 23/7£696
Mon 24/814:50
LHR
-
DEN
Nonstop9h 45m
United Airlines
Tue 8/920:25
DEN
-
LHR
Nonstop9h 00m
United Airlines
Deal found 23/7£721
Fri 21/806:55
LHR
-
DEN
1 stop13h 50m
United Airlines
Tue 8/917:35
DEN
-
LHR
Nonstop9h 05m
United Airlines
Deal found 23/7£726

Flights to Denver with United Airlines at a glance

Find detailed information about United Airlines flights from United Kingdom to Denver. Explore the options provided by United Airlines to plan your journey from United Kingdom to Denver. Data last updated 27 July 2026.

Popular in

July

Cheapest in

October

Average price

£676

Return from

£649

One-way from

£476
Highest demand for flights to Denver with United Airlines; 20% potential price increase.
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Best time to find cheap flights to Denver with United Airlines; 4% potential price drop.
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Average price for flights to Denver with United Airlines (return).
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United Airlines
  • United Airlines
  • 14/9-28/9
  • 1 total stop
  • 22h 50m total
  • United Kingdom to Denver
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United Airlines
  • United Airlines
  • 8/9
  • 1 total stop
  • 14h 40m total
  • United Kingdom to Denver
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Cheapflights Insights

Find cheap United Airlines flights to Denver

How long is the flight to Denver with United Airlines?

On average, United Airlines flights from the United Kingdom to Denver take 14 hours 12 minutes. Flights to Denver from other popular cities in the United Kingdom will vary in length. Below are a few examples of popular routes and their flight times.

United Airlines weekly flight availability to Denver

The most flights to Denver operated by United Airlines are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

When is the best time to book a flight to Denver with United Airlines?

The best time to book a flight to Denver with United Airlines is 9 days before departure. On average, fares are higher if you book 64 days before departure.

FAQs about flights to Denver with United Airlines

  • Which airport do United Airlines flights arrive at when travelling to Denver?

    United Airlines flights on this route tend to land at Denver Intl Airport.

  • Is United Airlines the cheapest airline for a flight to Denver?

    Flight prices will depend on factors like date, time, and cabin class, so it is worth comparing flights before booking. Based on Cheapflights data, the cheapest average return price for flights to Denver tends to be with Icelandair.

  • Are there alternative airlines other than United Airlines that fly to Denver?

    British Airways, Lufthansa and Icelandair all fly to Denver and offer an alternative to United Airlines.

  • How much is a United Airlines flight to Denver?

    The average price for a return flight with United Airlines is £707, while a one-way flight costs around £540.

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Reviews of United Airlines

See what Cheapflights users have to say about their United Airlines experience.
United Airlines
7.4
Good
10,000 reviews
Check prices
Overview

Crew

8.1

Entertainment

7.1

Comfort

7.3

Boarding

7.7

Food

6.6

Popular United Airlines flights

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Fly your favourite airline to Denver Intl

Fly your favorite airline to Denver Intl. Flight routes are based on user searches made on Cheapflights and were last updated on 27 July 2026.
United Airlines flights from London to Denver
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