Flights from Denver to London Heathrow

Our cheapest offers for flights from Denver to London Heathrow

Here you can compare cheap flights from Denver (DEN) to London Heathrow (LHR) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to London Heathrow. Prices and availability may change at any time.

Outbound Return Airlines Shop Baggage Price
Denver
London Heathrow
Outbound
02/13/26
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
02/26/26
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair
$503
Best option
Denver
London Heathrow
Outbound
11/09/25
direct
AY5418
09h 10min
Return
12/07/25
direct
AY5419
10h 05min
Finnair
$627
Denver
London Heathrow
Outbound
02/13/26
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
02/26/26
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair
$504
Denver
London Heathrow
Outbound
02/13/26
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
02/26/26
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair
$532
Denver
London Heathrow
Outbound
02/13/26
1 Stopover (KEF)
FI0670, FI0450
12h 10min
Return
02/26/26
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair ?
$545
Denver
London Heathrow
Outbound
11/09/25
1 Stopover (IAD)
UA0798, UA0924
11h 45min
Return
12/07/25
1 Stopover (FRA)
UA8812, UA8878
15h 30min
United Airlines ?
$606
Denver
London Heathrow
Outbound
11/09/25
1 Stopover (YVR)
AC5667, AC0860
17h 01min
Return
12/07/25
2 Stopovers (ZRH, YUL)
AC6818, AC6821, AC1073
17h 55min
Air Canada ?
$609
Denver
London Heathrow
Outbound
02/13/26
1 Stopover (KEF)
FI0670, FI0450
12h 10min
Return
02/26/26
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair ?
$623
Denver
London Heathrow
Outbound
11/09/25
1 Stopover (DFW)
BA1875, BA1589
13h 09min
Return
12/07/25
direct
BA0219
10h 05min
British Airways ?
$659
Denver
London Heathrow
Outbound
02/13/26
direct
BA0218
09h 10min
Return
02/26/26
direct
BA0219
10h 05min
British Airways ?
$730
Prices based on recent searches, subject to last-minute changes
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Tips and tricks to help you find cheap flights from Denver to London Heathrow

Favorite airline: Icelandair
85 % of travelers choose to book flights on this route with Icelandair, British Airways and Westjet.
Icelandair
58 %
British Airways
16 %
Westjet
11 %
Direct flights are more expensive
Compared to direct flights, flights with a stopover on this route are on average 21 % cheaper.
non stop flight
1 stop
2 stops
09h 00min
20h 35min
25h 55min
578 $
478 $
1.211 $
Favourite connection: via Reykjavik-Keflavik
When booking flights from Denver to London Heathrow 79 % of travelers prefer to fly via Reykjavik-Keflavik.
Route
bookings
1 stopover Reykjavik-Keflavik International
20h 35min, from 478 $
79 %
Direct flights
09h 00min, from 578 $
14 %
1 stopover Vancouver International Airport, BC
35h 05min, from 579 $
7 %

Important flight information

Flight information: Denver - London Heathrow

Roundtrip from 502,03 $
Flight duration min. 09:00
Return flight duration min. 09:55
Distance 7504 km
Flights per week 8
Departure airport Airport Denver International Airport, CO (DEN)
Arrival airport Airport London Heathrow (LHR)
Destination country Flights to United Kingdom
Alternative flights to London Heathrow
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