$1,533 Cheap Swiss International Air Lines flights Washington (IAD) to London (LHR)

View $1,533 flight on Fri, Dec 19, 2025Opens in a new window

$1,533 Cheap Swiss International Air Lines flights Washington (IAD) to London (LHR)

Prices were available within the past 7 days and start at $1,533 for one-way flights and $622 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Swiss International Air Lines
Sun, Mar 22 - Tue, Mar 31
IAD
Washington
LHR
London
$622 Roundtrip, found 3 days ago
$622
Roundtrip
found 3 days ago
Select Swiss International Air Lines flight, departing Sun, Mar 22 from Washington to London, returning Tue, Mar 31, priced at $622 found 3 days ago
Swiss International Air Lines
Sun, Mar 22 - Tue, Mar 31
IAD
Washington
LHR
London
$623 Roundtrip, found 3 days ago
$623
Roundtrip
found 3 days ago
Select Swiss International Air Lines flight, departing Sun, Mar 22 from Washington to London, returning Tue, Mar 31, priced at $623 found 3 days ago
Swiss International Air Lines
Sun, Mar 22 - Tue, Mar 31
IAD
Washington
LHR
London
$637 Roundtrip, found 3 days ago
$637
Roundtrip
found 3 days ago
Select Swiss International Air Lines flight, departing Sun, Mar 22 from Washington to London, returning Tue, Mar 31, priced at $637 found 3 days ago
Flights from Washington (IAD) to London (LHR)
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Finnair, Iberia, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Popular airline
United
Distance
5866 km
Average flight time
12 hours 10 mins