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Cheap Flights from Denver (DEN) to London (LHR)

View AU$432 flight on Fri, 8 Jan 2027Opens in a new window

Flight 1

Popular airlines from Denver International Airport (DEN) to Heathrow Airport (LHR)

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Cheap Flights from Denver (DEN) to London (LHR)

Prices were available within the past 7 days for one-way flights and round trip tickets for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Thu, 29 Oct - Sun, 8 Nov
DEN
Denver
LHR
London
AU$1,052 Return, found 3 days ago
AU$1,052
Return
found 3 days ago
Select Icelandair flight, departing Thu, 29 Oct from Denver to London, returning Sun, 8 Nov, priced at AU$1,052 found 3 days ago
Icelandair
Wed, 2 Dec - Sat, 12 Dec
DEN
Denver
LHR
London
AU$1,131 Return, found 6 days ago
AU$1,131
Return
found 6 days ago
Select Icelandair flight, departing Wed, 2 Dec from Denver to London, returning Sat, 12 Dec, priced at AU$1,131 found 6 days ago
United
Wed, 30 Sept - Wed, 7 Oct
DEN
Denver
LHR
London
AU$1,251 Return, found 2 days ago
AU$1,251
Return
found 2 days ago
Select United flight, departing Wed, 30 Sept from Denver to London, returning Wed, 7 Oct, priced at AU$1,251 found 2 days ago
United
Wed, 30 Sept - Wed, 7 Oct
DEN
Denver
LHR
London
AU$1,256 Return, found 2 days ago
AU$1,256
Return
found 2 days ago
Select United flight, departing Wed, 30 Sept from Denver to London, returning Wed, 7 Oct, priced at AU$1,256 found 2 days ago
United
Wed, 30 Sept - Wed, 7 Oct
DEN
Denver
LHR
London
AU$1,263 Return, found 2 days ago
AU$1,263
Return
found 2 days ago
Select United flight, departing Wed, 30 Sept from Denver to London, returning Wed, 7 Oct, priced at AU$1,263 found 2 days ago
Finnair
Wed, 30 Sept - Wed, 7 Oct
DEN
Denver
LHR
London
AU$1,277 Return, found 2 days ago
AU$1,277
Return
found 2 days ago
Select Finnair flight, departing Wed, 30 Sept from Denver to London, returning Wed, 7 Oct, priced at AU$1,277 found 2 days ago
United
Wed, 2 Dec - Sat, 12 Dec
DEN
Denver
LHR
London
AU$1,280 Return, found 6 days ago
AU$1,280
Return
found 6 days ago
Select United flight, departing Wed, 2 Dec from Denver to London, returning Sat, 12 Dec, priced at AU$1,280 found 6 days ago
Air France
Thu, 29 Oct - Sun, 8 Nov
DEN
Denver
LHR
London
AU$1,507 Return, found 3 days ago
AU$1,507
Return
found 3 days ago
Select Air France flight, departing Thu, 29 Oct from Denver to London, returning Sun, 8 Nov, priced at AU$1,507 found 3 days ago
Austrian Airlines
Wed, 30 Sept - Wed, 7 Oct
DEN
Denver
LHR
London
AU$1,621 Return, found 2 days ago
AU$1,621
Return
found 2 days ago
Select Austrian Airlines flight, departing Wed, 30 Sept from Denver to London, returning Wed, 7 Oct, priced at AU$1,621 found 2 days ago
Aeromexico
Thu, 29 Oct - Sun, 8 Nov
DEN
Denver
LHR
London
AU$2,551 Return, found 3 days ago
AU$2,551
Return
found 3 days ago
Select Aeromexico flight, departing Thu, 29 Oct from Denver to London, returning Sun, 8 Nov, priced at AU$2,551 found 3 days ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city centre is 28 minutes. Flights from AU$1,447
LHR
Heathrow
Cheapest
Average driving time to city centre28 min
Flights from AU$1,447

Find the cheapest month to fly from Denver (DEN) to London (LHR)

November is typically the cheapest month to fly

From AU$1,006 - AU$1,306 per traveller.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow) cost?
You can find cheap one-way flights from AU$432 and cheap return flights from AU$1,052 DEN to LHR with Expedia. One-way flights typically cost between AU$570 and AU$3,694 and return flights often range between AU$1,566 and AU$6,707. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when DEN to LHR ticket fares go up or down.
What is the cheapest month to fly from Denver, CO (DEN) to London (LHR)?
The cheapest months to fly from Denver, CO (DEN) to London (LHR) are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
There are 2 airlines that offer direct flights from Denver International Airport (DEN) to London Heathrow (LHR):
  • United operates 14 direct flights from Denver International Airport (DEN) to London Heathrow (LHR) every week.
  • British Airways operates 7 direct flights from Denver International Airport (DEN) to London Heathrow (LHR) every week.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
United is one of the cheapest airlines offering nonstop return flights from Denver Intl. (DEN) to Heathrow (LHR), with tickets starting from around AU$1308 for flights that can be booked for departure within the next year. Delta offers one of the cheapest connecting return flights from Denver Intl. (DEN) to Heathrow (LHR) starting from around AU$1316. These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Denver, CO (DEN) to London (LHR)?
To find a cheap flight from Denver, CO (DEN) to London (LHR), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
The best airline to fly with from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow) will differ from traveler to traveler. If you like to fly early, British Airways offers early morning flights. If price is the most important factor, United typically offers the lowest fares. American Airlines offers the most daily flights from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Denver, CO (DEN) to London (LHR)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
You'll find around 3 nonstop flights per day from Denver International Airport (DEN) to London Heathrow (LHR). For even more choices, look at flights that include layovers, as there are approximately 162 connecting flights per day. Some common connection points include O'Hare International Airport (ORD), John F. Kennedy International Airport (JFK), and Logan International Airport (BOS).
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
The earliest flight from Denver International Airport (DEN) to London Heathrow (LHR) typically departs around 12:20 AM local time. This flight is operated by Delta and is a seasonal service, active in January and December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
You'll generally find the most flights from Denver International Airport (DEN) to London Heathrow (LHR) on a Thursday, with around 108 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United, American Airlines, and Delta. Flight schedules are quite consistent throughout the week, so you'll have plenty of choices regardless of your travel day.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Denver Intl. (DEN) to Heathrow (LHR) are in the afternoon, from 3pm to 6pm. Many major carriers, including United, Lufthansa and American Airlines, offer flights during this window. Many travellers prefer this time as it allows for a full day of activities before heading to the airport, and you'll arrive in London in the morning, ready to start your day.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
A nonstop flight from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow) typically takes around 9 hours. This route covers a distance of approximately 7,500 kilometres. If you opt for a flight with one stop, your travel time will be longer, usually around 13 hours 48 minutes. Flights with two or more stops will take even longer, averaging about 15 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your trip.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to London (LHR-Heathrow)?
Yes, you can fly business class or first class between DEN and LHR.Airlines that offer business class service on this route include:
  • Lufthansa
  • Air France
  • Swiss International Air Lines
  • Turkish Airlines
  • Aer Lingus
  • British Airways
  • Icelandair
  • Air Canada
  • Alaska Airlines
  • Delta
  • United
  • American Airlines
  • Edelweiss Air
  • American Eagle
First class cabins are available on Lufthansa, United, and American Airlines.
How do I earn miles on a Denver, CO (DEN) to London (LHR) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN) to London (LHR) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London (LHR) from Denver, CO (DEN)?
If you're planning to travel to London from Denver Intl. (DEN), you can fly directly into Heathrow (LHR). Some flights may connect through major hubs like O'Hare Intl. (ORD), Seattle - Tacoma Intl. (SEA), or Philadelphia Intl. (PHL) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN) to London (LHR) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN) to London (LHR) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN) to London (LHR) flight and hotel package?
Securing a Denver, CO (DEN) to London (LHR) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN) to London (LHR)?
If you booked your Denver, CO (DEN) to London (LHR) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

0
Origin airport
Denver Intl.
Destination airport
Heathrow
Roundtrip price
AU$1,051
Distance
7454 km

Book with confidence

Your quick guide to flights from Denver to London

Pick up great flights from Denver to London

With Expedia, you have your pick of flights a day with 20 airlines covering flights from Denver to London. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from Denver to London that take around hours.

Find cheap flights from Denver to London

From the great flight deals with prices currently ranging from AU$1,052 to AU$2,551, you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from Denver to London around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to London is normally in October.

Reasons to book your flight from Denver to London with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from Denver to London across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to London right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

Your quick guide to flights from Denver to London

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