Flights from Denver to London available from USD 714*
Our best rates from Denver to London
Fly in the next 3 months: flights from Denver to London (LON)
Icelandair airfare from Denver to London - starting at USD 714
Denver (DEN)to
London (LON)Denver (DEN)to
London (LON)Denver (DEN)to
London (LON)Denver (DEN)to
London (LON)Denver (DEN)to
London (LON)Flights from Denver (DEN) to London (LON) in the next 365 days
Book ahead and find our best prices in 2026 and beyond
From | To | Fare type | Dates | Price | |
|---|---|---|---|---|---|
| Denver (DEN) | London (LON) | Round trip / Economy | Jan 27 2027 - Feb 18 2027 | From USD 714 Viewed 16 hrs ago | |
| Denver (DEN) | London (LON) | Round trip / Economy | Jan 27 2027 - Feb 20 2027 | From USD 714 Viewed 16 hrs ago | |
| Denver (DEN) | London (LON) | Round trip / Economy | Jan 29 2027 - Feb 05 2027 | From USD 714 Viewed 16 hrs ago | |
| Denver (DEN) | London (LON) | Round trip / Economy | Jan 29 2027 - Feb 07 2027 | From USD 714 Viewed 16 hrs ago | |
| Denver (DEN) | London (LON) | Round trip / Economy | Jan 29 2027 - Feb 18 2027 | From USD 714 Viewed 16 hrs ago |
Make the most of your trip
Traveling to London

Flying to London
Planning your trip from the US to the UK? Icelandair offers convenient flights from Denver to London. You’ll arrive at either London Heathrow (LHR) or London Gatwick (LGW) — two of the city’s major international airports. Both offer excellent transport links to the city centre, frequent departures, and a wide range of airport services for travelers.
Heathrow is the UK’s busiest airport and offers more flight options and flexibility for your travel dates. On the other hand, Gatwick is the smaller of the two and is often less crowded and offers a quicker journey through the terminal. Whether you're searching for flights from Denver to LHR or exploring other UK routes, both airports offer easy access to central London via express trains, buses, or taxis.
Top attractions in London
From world-famous landmarks to hidden hot-spots, London has something for every kind of traveler. History lovers can get lost in the Tower of London, Westminster Abbey, or the National History Museum, while fans of the art can catch a plethora of performances in the West End or admire masterpieces in the National Gallery.
Stroll through Hyde Park, shop along the famous Oxford Street, or enjoy skyline views from the London Eye. Foodies are in safe hands too. Borough Market have an eclectic mix of international cuisines that will tantalise your taste buds or the city’s countless pubs and cafes offer a taste for the local flavors.


Flights from Denver to London
Take the stress out of long-haul trips when you fly from Denver to London with Icelandair. With Wi-Fi access on most aircrafts, a variety of tempting treats, and comfortable blankets and pillows – not to mention excellent in-flight entertainment – all you need to do is sit back, relax, and enjoy the ride.
Add a stopover in Iceland to your journey
Icelandair offers regular flights from Denver, Colorado, to London, England via our hub in Keflavík, Iceland. Turn your trip into a two-in-one getaway. When you fly from Denver to London with Icelandair, you can stopover in Iceland to your travel plans with no extra airfare. Stay for a maximum of seven days, which will give you plenty of time to explore our country’s natural beauty, from cascading waterfalls and magical northern lights, to the vibrant energy of Reykjavík, Iceland’s charming capital city. Whether you spend a day in Reykjavík exploring the unique Nordic cuisine and culture or a whole week, you won’t be disappointed.

FAQs about travel from Denver to London
Helpful information for travelers visiting London from the US
How long is the flight from Denver to London?
The typical Denver to London flight time, including a brief layover in our Keflavík hub, is around 12 hours. The first leg of the journey from Denver to Keflavík is approximately 7 hours, with a 2-hour long layover in KEF. The final leg to London is approximately 3 hours.
Can you get direct flights from Denver to London?
All Icelandair flights have a stopover in Keflavík Airport (KEF), which allows you to explore everything this island has to offer, or simply enough time for a short break rest and recharge between long-haul flights.
What is the time difference between Denver and London?
London is seven hours ahead of Denver. When you land from your Denver to UK flight, adjusting to the new time zone can sometimes take a toll. Read our Wellness Travel Report for tips on coping with jet lag as you cross time zones, especially if you’re arriving after a long-haul overnight flight.
When is the best time to book flights to London from Denver?
London’s off seasons (April-May and September-October) usually offer better value on tickets from London to Denver and vice versa when it comes to booking flights and accommodation.
Booking during these low seasons can help you find cheap flights from Denver to London. Alternatively, check our flight deals regularly, especially if you’re looking for discounted Denver to London one way fares.
Does Icelandair offer flights from Denver to London Heathrow?
Icelandair offers regular flights from Denver to LHR, with an easy connection via Iceland. You can fly from Denver International Airport (DEN) to both Heathrow Airport (LHR) and Gatwick Airport (LGW), so you can choose a route that’s convenient for you.
Flying with Icelandair: more than just a journey
Generous baggage allowances
Learn more
Entertainment for all ages
Learn more
