$1,173 Cheap American Airlines flights Washington (IAD) to London (LHR)

View $1,173 flight on Mon, Dec 22, 2025Opens in a new window

$1,173 Cheap American Airlines flights Washington (IAD) to London (LHR)

Prices were available within the past 7 days and start at $1,173 for one-way flights and $641 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Mar 12 - Fri, Mar 20
IAD
Washington
LHR
London
$641 Roundtrip, found 2 days ago
$641
Roundtrip
found 2 days ago
Select American Airlines flight, departing Thu, Mar 12 from Washington to London, returning Fri, Mar 20, priced at $641 found 2 days ago

Find the cheapest month to fly from Washington (IAD) to London (LHR)

January is typically the cheapest month to fly

From $444 - $934 per traveler.
Flights from Washington (IAD) to London (LHR)
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Air Canada, Lufthansa, United, Virgin Atlantic
Popular airline
United
Distance
5866 km
Average flight time
12 hours 22 mins