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

View $1,540 flight on Wed, Nov 5, 2025Opens 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 $451 for roundtrip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Swiss International Air Lines
Mon, Dec 1 - Mon, Dec 8
LHR
London
IAD
Washington
$451
Roundtrip
Found 16 hours ago
Select Swiss International Air Lines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at $451 Found 16 hours ago
Swiss International Air Lines
Mon, Aug 25 - Wed, Sep 10
LHR
London
IAD
Washington
$459
Roundtrip
Found 20 hours ago
Select Swiss International Air Lines flight, departing Mon, Aug 25 from London to Washington, returning Wed, Sep 10, priced at $459 Found 20 hours ago
Swiss International Air Lines
Mon, Dec 1 - Mon, Dec 8
LHR
London
IAD
Washington
$461
Roundtrip
Found 16 hours ago
Select Swiss International Air Lines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at $461 Found 16 hours ago
Swiss International Air Lines
Mon, Dec 1 - Mon, Dec 8
LHR
London
IAD
Washington
$462
Roundtrip
Found 16 hours ago
Select Swiss International Air Lines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at $462 Found 16 hours ago
Swiss International Air Lines
Mon, Sep 1 - Tue, Sep 9
LHR
London
IAD
Washington
$575
Roundtrip
Found 1 day ago
Select Swiss International Air Lines flight, departing Mon, Sep 1 from London to Washington, returning Tue, Sep 9, priced at $575 Found 1 day 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
Aer Lingus
Distance
3666 mi
Average flight time
3 hours 14 mins

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