$455 Cheap Icelandair flights Denver (DEN) to London (LHR)

View $455 flight on Sat, Feb 21, 2026Opens in a new window

$455 Cheap Icelandair flights Denver (DEN) to London (LHR)

Prices were available within the past 7 days and start at $455 for one-way flights and $520 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Icelandair
Wed, Feb 18 - Thu, Feb 26
DEN
Denver
LHR
London
$520 Roundtrip, found 20 hours ago
$520
Roundtrip
found 20 hours ago
Select Icelandair flight, departing Wed, Feb 18 from Denver to London, returning Thu, Feb 26, priced at $520 found 20 hours ago
Icelandair
Wed, Feb 18 - Sat, Feb 28
DEN
Denver
LHR
London
$522 Roundtrip, found 20 hours ago
$522
Roundtrip
found 20 hours ago
Select Icelandair flight, departing Wed, Feb 18 from Denver to London, returning Sat, Feb 28, priced at $522 found 20 hours ago

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

October is typically the cheapest month to fly

From $499 - $705 per traveler.
Flights from Denver (DEN) to London (LHR)
Origin airport
Denver Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, United
Popular airline
United
Distance
7454 km
Average flight time
16 hours 7 mins