Flights from Denver to London Heathrow

Trip type

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
03/28/26
1 Stopover (KEF)
FI0670, FI0450
12h 15min
Return
04/25/26
1 Stopover (KEF)
FI0455, FI0671
28h 35min
Icelandair
$513
Best option
Denver
London Heathrow
Outbound
03/28/26
direct
AY5418
08h 55min
Return
04/25/26
direct
AY5419
09h 55min
Finnair
$709
Denver
London Heathrow
Outbound
05/16/26
2 Stopovers (SEA, FRA)
AS0525, DE2033, LH0914
24h 40min
Return
05/29/26
2 Stopovers (FRA, JFK)
LH0923, DE2016, B60097
22h 31min
Alaska Airlines, Condor, Lufthansa
$1,388
Denver
London Heathrow
Outbound
03/28/26
1 Stopover (KEF)
FI0670, FI0450
12h 15min
Return
04/25/26
1 Stopover (KEF)
FI0455, FI0671
28h 35min
Icelandair ?
$568
Denver
London Heathrow
Outbound
03/28/26
1 Stopover (KEF)
FI0670, FI0450
12h 15min
Return
04/25/26
1 Stopover (KEF)
FI0455, FI0671
28h 35min
Icelandair ?
$605
Denver
London Heathrow
Outbound
03/28/26
1 Stopover (DFW)
BA1878, BA0192
13h 07min
Return
04/25/26
direct
BA0219
09h 55min
British Airways ?
$673
Denver
London Heathrow
Outbound
03/28/26
1 Stopover (YUL)
AC1074, AC0864
15h 45min
Return
04/25/26
2 Stopovers (VIE, YYZ)
AC6186, AC0887, AC1041
17h 35min
Air Canada ?
$701
Denver
London Heathrow
Outbound
03/28/26
direct
BA0218
08h 55min
Return
04/25/26
direct
BA0219
09h 55min
British Airways ?
$709
Denver
London Heathrow
Outbound
03/28/26
direct
IB3591
08h 55min
Return
04/25/26
direct
IB3592
09h 55min
Iberia
$711
Denver
London Heathrow
Outbound
05/16/26
1 Stopover (YYZ)
AC1038, AC0852
32h 25min
Return
05/29/26
1 Stopover (MUC)
LH2485, LH0480
13h 55min
Air Canada
$756
Prices based on recent searches, subject to last-minute changes
Page 1 / 3

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 $ 512,29
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