$1,540 Cheap Swiss International Air Lines flights London (LHR) to Washington (IAD)

View $1,540 flight on Sun, Jan 4, 2026Opens in a new window

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$1,540 Cheap Swiss International Air Lines flights London (LHR) to Washington (IAD)

Prices were available within the past 7 days and start at $1,540 for one-way flights and $617 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Swiss International Air Lines
Wed, Sep 10 - Thu, Sep 18
LHR
London
IAD
Washington
$617
Roundtrip
Found 6 hours ago
Select Swiss International Air Lines flight, departing Wed, Sep 10 from London to Washington, returning Thu, Sep 18, priced at $617 Found 6 hours ago
Flights from London (LHR) to Washington (IAD)
Origin airport
Heathrow
Destination airport
Washington Dulles Intl.
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Popular airline
Austrian Airlines
Distance
3666 mi
Average flight time
3 hours 14 mins

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