
$393 Cheap Swiss International Air Lines flights Washington (IAD) to London (LHR)
Prices were available within the past 7 days and start at $393 for one-way flights and $622 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Mar 12 - Fri, Mar 20
IAD
Washington
LHR
London
$622 Roundtrip, found 1 day ago
$622
Roundtrip
found 1 day ago

Thu, Mar 12 - Fri, Mar 20
IAD
Washington
LHR
London
$633 Roundtrip, found 1 day ago
$633
Roundtrip
found 1 day ago

Thu, Mar 12 - Fri, Mar 20
IAD
Washington
LHR
London
$636 Roundtrip, found 1 day ago
$636
Roundtrip
found 1 day ago
Find the cheapest month to fly from Washington (IAD) to London (LHR)
January is typically the cheapest month to fly
From $444 - $934 per traveler.
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, Icelandair, KLM, Lufthansa, Swiss International Air Lines, United, Virgin Atlantic |
Popular airline | Delta |
Distance | 5866 km |
Average flight time | 12 hours 22 mins |
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Most Popular Swiss International Air Lines Routes from Washington
Most Popular Swiss International Air Lines Routes from London
- New York to Skopje (JFK - SKP)
- London to Chicago (LGW - ORD)
- Miami to London (MIA - LGW)
- Miami to Barcelona (MIA - BCN)
- New York to Venice (JFK - VCE)
- Newark Liberty Intl. Airport to Athens (EWR - ATH)
- Minneapolis to Stockholm (MSP - ARN)
- Miami to Madrid (MIA - MAD)
- Washington to Manchester (IAD - MAN)
- Washington to Hyderabad (IAD - HYD)
Popular Domestic Routes in Heathrow
- New York to Venice (JFK - VCE)
- Miami to Madrid (MIA - MAD)
- New York to Skopje (JFK - SKP)
- Newark Liberty Intl. Airport to London (EWR - LHR)
- Las Vegas to Málaga (LAS - AGP)
- Newark Liberty Intl. Airport to Paris (EWR - CDG)
- Washington to Manchester (IAD - MAN)
- Washington to London (IAD - LCY)
- Washington to Ahmedabad (IAD - AMD)
- Minneapolis to Stockholm (MSP - ARN)