$1,548 Cheap Swiss International Air Lines flights London (LHR) to Washington (IAD)

View $1,548 flight on Wed, Sep 10, 2025Opens in a new window

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$1,548 Cheap Swiss International Air Lines flights London (LHR) to Washington (IAD)

Prices were available within the past 7 days and start at $1,548 for one-way flights and $451 for round trip, 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 1 day ago
$451
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at $451 found 1 day ago
Swiss International Air Lines
Mon, Aug 25 - Wed, Sep 10
LHR
London
IAD
Washington
$459 Roundtrip, found 1 day ago
$459
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, Aug 25 from London to Washington, returning Wed, Sep 10, priced at $459 found 1 day ago
Swiss International Air Lines
Mon, Dec 1 - Mon, Dec 8
LHR
London
IAD
Washington
$461 Roundtrip, found 1 day ago
$461
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at $461 found 1 day ago
Swiss International Air Lines
Mon, Dec 1 - Mon, Dec 8
LHR
London
IAD
Washington
$462 Roundtrip, found 1 day ago
$462
Roundtrip
found 1 day ago
Select Swiss International Air Lines flight, departing Mon, Dec 1 from London to Washington, returning Mon, Dec 8, priced at $462 found 1 day ago
Swiss International Air Lines
Mon, Sep 1 - Tue, Sep 9
LHR
London
IAD
Washington
$575 Roundtrip, found 1 day ago
$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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