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
11/03/25
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
11/12/25
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair
$460
Best option
Denver
London Heathrow
Outbound
11/03/25
direct
BA0218
09h 05min
Return
11/12/25
direct
BA0219
10h 00min
British Airways ?
$541
Denver
London Heathrow
Pay attention to transfer at connecting flight
Outbound
06/08/25
1 Stopover (YYC)
WS1571, WS0018
16h 50min
Return
06/12/25
3 Stopovers (OSL, JFK, MSP)
SK0802, N00001, SY0568, SY0657
42h 10min
Westjet
$783
Denver
London Heathrow
Outbound
06/18/25
2 Stopovers (SEA, CPH)
SK3801, SK0938, SK1507
29h 15min
Return
07/15/25
2 Stopovers (CPH, BOS)
SK0500, SK0927, SK3495
23h 29min
SAS Scandinavian Airlines
$846
Denver
London Heathrow
Outbound
11/03/25
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
11/12/25
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair
$464
Denver
London Heathrow
Outbound
11/03/25
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
11/12/25
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair
$481
Denver
London Heathrow
Outbound
11/03/25
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
11/12/25
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair ?
$482
Denver
London Heathrow
Outbound
11/03/25
1 Stopover (KEF)
FI0670, FI0454
20h 50min
Return
11/12/25
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair ?
$495
Denver
London Heathrow
Outbound
10/18/25
1 Stopover (KEF)
FI0670, FI0450
12h 15min
Return
11/17/25
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair ?
$500
Denver
London Heathrow
Outbound
11/03/25
1 Stopover (KEF)
FI0670, FI0450
12h 10min
Return
11/12/25
1 Stopover (KEF)
FI0451, FI0671
12h 50min
Icelandair ?
$548
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 $459.47
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
Flight destinations with a similar price
Flight destinations with a similar price