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DEN

Find cheap United Airlines flights to Denver from £503

1 adult
0 bags
Fri 7/6
Fri 14/6

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Good to know

Low season

January

High season

September

Cheapest flight

£503

Average price round-trip

£699
Best time to beat the crowds (9% less expensive on average)
Most popular time to fly and prices are also 5% lower on average.
Flight from London Heathrow Airport to Denver
(price for this month)

When to book flights with United Airlines to Denver

Average price per month
Flight prices as travel date approaches

FAQs for flying to Denver with United Airlines

  • Which airport do United Airlines flights to Denver fly into?

    You’ll fly into Denver Airport when flying to Denver with United Airlines.

  • Are there any other airlines in Star Alliance that fly to Denver?

    Unfortunately, there are no other airlines in Star Alliance that fly to Denver.

United Airlines customer reviews

7.4
GoodBased on 11,043 verified guest reviews
6.7Food
7.2Comfort
7.7Boarding
8.1Crew
7.1Entertainment

Traveller rating:
Sort by:
R
6.8 Okay
Pros:The crew was excellent - courteous/aware/friendly. The flight, although 2 hours delayed (9;20pm scheduled departure) was pleasant and smooth. Also, the de-boarding process was surprisingly quick.
Cons:A 2 hour delay at 9:20pm at night is unfortunate yet frustrating experience, especially when we moved our flight up due to a travel warning for EWR (ironically enough, our originally scheduled flight (1922 MCO-EWR). I'm giving an overall OK (instead of good) due to the fact that there were no snacks (although I did not want anything, it didn't go unnoticed) and although there was free inflight entertainment for personal devices, I feel the passengers should have been given free internet access - in my opinion, it would have been the appropriate thing to do. In any case, this experience doesn't change my positive opinion of United.
A
4.6 Mediocre
Cons:The first contact in the airport was quite rude when informing me that I had to measure my suitcase for size. I have carried this suitcase on on every airline for over 10 years....the size got smaller and United got $25.00....not happy. There was NO free movies, no access to TV, flight pattern....nothing and it could not be turned off. ONE cookie for a coast-to-coast flight. What happened to United?
A
10.0 Wonderful
On time departure and arrival.
A
10.0 Wonderful
Pros:Nice smooth flight
Cons:Everything
B
5.6 Fair
Cons:More water, drinks. The food was absolutely horrible.
A
7.3 Good
Pros:Amazing crew
Cons:Tight seats, no access to actual WiFi unless you purchase a yearly or monthly plan
S
4.6 Mediocre
Pros:Ordered the Protein Box, it was ok.. crew members nice.
Cons:The Smell on the flight was unacceptable, I was sitting about a couple rows across the middle bathroom, and it smelled horrible, I had never had an experience like this on any other flight, I fly United many times a year, and this had me really uncomfortable for almost 5 hours, since the flight was delayed almost 1.5 hours while we sat onboard the aircraft at the gate, that had me miss dinner plans too in San Francisco as well. I really hope they can fix that, For the good of the passengers, felt like I was going to be nauseous all the time, and I'm really not someone that complains or takes time to review badly.
N
4.6 Mediocre
Cons:2.5 hour delay. No working bathrooms. Couldn't hear the tv and headphones that they gave out were useless.
A
2.0 Poor
Cons:Purchased tickets 4 months before this flight for a departure time of 6:05pm. Tried to check in and check baggage at 9:30am but was turned away saying I could only check in 3 hrs prior to my flight. Came back at 3:00pm to check-in and they could not find my information. An hour later they find out that they cancelled the flight and moved my departure time to 8:25am for that day. They say they emailed 3 times in May but I never got it (I'm a bit crazy about my email staying clean) so they say it might have went in to my spam folder due to they types of emails they send to customers. They only kept repeating that they notified me so there is nothing they could do. I ended up going to Air Canada to get a flight to PHX the next day. No apology, no help, no hotel for the night...Terrible experience by United. They gave me a customer relations group contact information to follow up with for complaint but since they sent me the 3 emails in May about the change, they have no liability to fix the situation.
A
2.0 Poor
Cons:Departure was delayed. No explanation. The boarding area is crowded and confusing. The plane's bins were too small for roller boards so passengers had to carry bags outdoors in snow and terrible wind, to get them loaded. The Newark airport where the plane landed was miserable! Departure from Newark was worse than landing if that could be possible! Awful!

Book Cheap flights with United Airlines to Denver

Recent return flight deals

9/9Mon
1 stopUnited Airlines
13h 57mLHR-DEN
7/10Mon
1 stopUnited Airlines
12h 28mDEN-LHR
£503
19/9Thu
1 stopUnited Airlines
14h 10mLHR-DEN
30/9Mon
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17h 45mDEN-LHR
£521
11/9Wed
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14h 10mLHR-DEN
20/9Fri
1 stopUnited Airlines
13h 41mDEN-LHR
£522
9/9Mon
directUnited Airlines
9h 45mLHR-DEN
20/9Fri
1 stopUnited Airlines
13h 41mDEN-LHR
£527
9/9Mon
directUnited Airlines
9h 45mLHR-DEN
20/9Fri
1 stopUnited Airlines
13h 41mDEN-LHR
£528
9/9Mon
1 stopUnited Airlines
14h 19mLHR-DEN
20/9Fri
1 stopUnited Airlines
13h 41mDEN-LHR
£531
26/9Thu
directUnited Airlines
9h 45mLHR-DEN
29/9Sun
1 stopUnited Airlines
30h 00mDEN-LHR
£532
9/9Mon
1 stopUnited Airlines
13h 34mLHR-DEN
20/9Fri
1 stopUnited Airlines
13h 41mDEN-LHR
£533
26/9Thu
1 stopUnited Airlines
23h 55mLHR-DEN
29/9Sun
1 stopUnited Airlines
33h 00mDEN-LHR
£537
1/11Fri
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17h 05mLHR-DEN
15/11Fri
directUnited Airlines
9h 05mDEN-LHR
£549
9/9Mon
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16/9Mon
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12h 00mDEN-LHR
£550
3/11Sun
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12h 00mDEN-LHR
£550
9/9Mon
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13h 34mLHR-DEN
12/9Thu
1 stopUnited Airlines
12h 00mDEN-LHR
£554
8/9Sun
directUnited Airlines
9h 45mLHR-DEN
21/9Sat
directUnited Airlines
9h 00mDEN-LHR
£557
2/11Sat
1 stopUnited Airlines
14h 12mLHR-DEN
23/11Sat
directUnited Airlines
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£558
12/9Thu
directUnited Airlines
9h 45mLHR-DEN
21/9Sat
directUnited Airlines
9h 00mDEN-LHR
£558
8/9Sun
directUnited Airlines
9h 45mLHR-DEN
17/9Tue
directUnited Airlines
9h 00mDEN-LHR
£578
8/9Sun
directUnited Airlines
9h 45mLHR-DEN
16/9Mon
directUnited Airlines
9h 00mDEN-LHR
£579
7/9Sat
1 stopUnited Airlines
33h 10mLHR-DEN
21/9Sat
1 stopUnited Airlines
15h 15mDEN-LHR
£584
5/6Wed
1 stopUnited Airlines
13h 55mLHR-DEN
10/6Mon
directUnited Airlines
9h 00mDEN-LHR
£591

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Recent one-way flight deals

7/10Mon
directUnited Airlines
9h 45mLHR-DEN
£1,277
26/7Fri
directUnited Airlines
9h 35mLHR-DEN
£1,591
21/5Tue
directUnited Airlines
9h 45mLHR-DEN
£8,246

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Flights to Denver - United Airlines

Destination:

Denver Intl (DEN)United States

Return flight deals:

Denver Intl - United Kingdom

Cabin classes:

£1,598
£935
£529

Browse origins: