$325 Cheap United flights from Denver to London (DEN to LHR)

Find The Best Day To Fly from Denver to London

Amazing United DEN to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $853 round trip and $325 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Oct 27 - Thu, Nov 5
DEN
Denver
LHR
London
$853 Roundtrip, found 7 hours ago
$853
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Oct 27 from Denver to London, returning Thu, Nov 5, priced at $853 found 7 hours ago

LHR From DEN Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Hotel Riu Plaza London The Westminster

Hotel Riu Plaza London The Westminster

4 out of 5
Price was $2,381, price is now $1,607 per person
$1,607
per person
Nov 8 - Nov 14
found 1 day ago
Roundtrip non-stop flight included
Denver (DEN) to London (LHR)
Hotel Riu Plaza London Victoria

Hotel Riu Plaza London Victoria

4 out of 5
Save 100% on your flight
Price was $2,481, price is now $1,618 per person
$1,618
per person
Oct 2 - Oct 7
found 1 day ago
Roundtrip flight included
Denver (DEN) to London (LHR)
Hotel La Place

Hotel La Place

3.5 out of 5
Price was $2,354, price is now $1,664 per person
$1,664
per person
Nov 8 - Nov 14
found 1 day ago
Roundtrip non-stop flight included
Denver (DEN) to London (LHR)
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Frequently asked questions

Can I catch a flight from DEN to Heathrow Airport right now?
It's prudent to learn about any travel advice reports and quarantine requirements in place in your destination city. Make sure you visit the Covid-19 Travel Advisor for up-to-date information on catching a flight to Heathrow Airport from Denver Airport.
What terminal is United Airlines at Denver Airport?
If you're flying with United Airlines from DEN, you'll usually be boarding from the main terminal. If you're heading to London Heathrow from here, you'll probably be filing off the aircraft at terminal 2.
Are there United Airlines non-stop flights from DEN to LHR?
You'll be happy to hear you can go direct from DEN to LHR with United Airlines and avoid annoying layovers. The less time you spend in the air, the more time you'll have for exploring.
How long is a United Airlines flight from DEN to LHR?
As it'll take an average of 9 hours and 56 minutes for your United Airlines flight to jet from DEN to LHR, consider putting a couple of travel games in your hand luggage. You never know — the passenger next to you might love a challenge to break up the journey.
What type of aircraft does United Airlines fly from DEN to LHR?
Enjoy all that the Boeing 787-9 has to offer when traveling between Denver Intl. Airport (DEN) and Heathrow Airport (LHR) with United Airlines. Typically, this is the aircraft that operates on this leg.
How many direct and indirect flights does United Airlines fly from DEN to LHR?
United Airlines currently operates roughly 3 flights per day from DIA airport to London Heathrow.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Heathrow Airport (LHR), please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Denver DEN to London LHR 

To find the best deals on flights to Denver from London with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Denver DEN to London LHR with United 

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $853 to $853, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way United flights from Denver DEN to London LHR 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Denver to London costs from $325. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to London LHR from  Denver DEN with United 

To find a cheap United flight from Denver DEN to London LHR, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on United flights from Denver DEN to London LHR 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as October, or if you book a flight with a stopover. 

 

Find nonstop flights from Denver DEN to London LHR with United 

If you’re keen to be on London soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for United flights from Denver DEN to London LHR 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to London LHR from  Denver DEN with United on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Hop on a(n) United flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.227
DENUSADenver Intl.226
IAHUSAGeorge Bush Intercontinental136
IADUSAWashington Dulles Intl.100
SFOUSASan Francisco Intl.64
LAXUSALos Angeles Intl.23
EWRUSALiberty Intl.20
FRADEUFrankfurt Intl.19
NRTJPNNarita Intl.19
PEKCHNCapital Intl.16

Travelers ❤️ these 🏨 after their flight to London

Hilton Garden Inn London Heathrow Terminal 2 and 3

Hilton Garden Inn London Heathrow Terminal 2 and 3

3.5 out of 5
Heathrow T2 Hounslow England
This hotel features a restaurant and 2 bars/lounges. Enjoy the gym and perks like free WiFi. A 24-hour business center, a snack bar/deli, and express check-out ...
Hilton Garden Inn London Heathrow Terminal 2 and 3
Renaissance London Heathrow Hotel

Renaissance London Heathrow Hotel

4 out of 5
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This hotel features a restaurant, a 24-hour gym, and a bar/lounge. Traveling on business? Take advantage of the business center, free WiFi in public areas, and ...
9/10 Wonderful! (2,489 reviews)
"This is a great hotel to stay. The staff are helpful and friendly, the large lobby is great for meeting up with friends or hanging out. The rooms were quiet. We had a problem with the thermostat in our room, not sure if we couldn't figure it out but it kept resetting itself. There's a small "tuck ..."

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Renaissance London Heathrow Hotel
Premier Inn Heathrow Airport Terminal 4

Premier Inn Heathrow Airport Terminal 4

3 out of 5
Terminal 4, Sheffield Road Hounslow England
A restaurant, self parking, and a 24-hour front desk are among this hotel's amenities. WiFi in public areas is free. Express check-out and luggage storage are ...
8.6/10 Excellent! (1,880 reviews)
"Staff were very helpful during check in. Room was clean and the breakfast buffet was great."

Reviewed on Sep 16, 2026

Premier Inn Heathrow Airport Terminal 4
Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.