$384 Cheap United flights Washington (IAD) to London (LHR)

View $384 flight on Tue, Sep 30, 2025Opens in a new window

$384 Cheap United flights Washington (IAD) to London (LHR)

Prices were available within the past 7 days and start at $384 for one-way flights and $548 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$548
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $548 Found 1 day ago
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$551
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $551 Found 1 day ago
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$553
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $553 Found 1 day ago
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$556
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $556 Found 1 day ago
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$558
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $558 Found 1 day ago
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$566
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $566 Found 1 day ago
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$571
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $571 Found 1 day ago
United
Tue, Sep 30 - Mon, Oct 6
IAD
Washington
LHR
London
$575
Roundtrip
Found 1 day ago
Select United flight, departing Tue, Sep 30 from Washington to London, returning Mon, Oct 6, priced at $575 Found 1 day ago
Flights from Washington (IAD) to London (LHR)
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, KLM, Lufthansa, Scandinavian Airlines, TAP Portugal, United, Virgin Atlantic
Popular airline
United
Distance
5866 km
Average flight time
12 hours 25 mins