Finnair Cheap Flights from Washington to London: AY WAS→LON

View HK$3,839 flight on Tue, 20 Jan 2026Opens in a new window
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Prices were available within the past 7 days and start at HK$3,839 for one-way flights and HK$6,552 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Finnair
Thu, 12 Feb - Sun, 22 Feb
BWI
Baltimore
LHR
London
HK$6,552 Return, found 3 days ago
HK$6,552
Return
found 3 days ago
Select Finnair flight, departing Thu, 12 Feb from Baltimore to London, returning Sun, 22 Feb, priced at HK$6,552 found 3 days ago
Finnair
Thu, 12 Feb - Sun, 22 Feb
BWI
Baltimore
LHR
London
HK$6,622 Return, found 3 days ago
HK$6,622
Return
found 3 days ago
Select Finnair flight, departing Thu, 12 Feb from Baltimore to London, returning Sun, 22 Feb, priced at HK$6,622 found 3 days ago
Finnair
Thu, 12 Feb - Sun, 22 Feb
BWI
Baltimore
LHR
London
HK$6,666 Return, found 3 days ago
HK$6,666
Return
found 3 days ago
Select Finnair flight, departing Thu, 12 Feb from Baltimore to London, returning Sun, 22 Feb, priced at HK$6,666 found 3 days ago
Finnair
Tue, 20 Jan - Sun, 25 Jan
BWI
Baltimore
LHR
London
HK$6,792 Return, found 2 days ago
HK$6,792
Return
found 2 days ago
Select Finnair flight, departing Tue, 20 Jan from Baltimore to London, returning Sun, 25 Jan, priced at HK$6,792 found 2 days ago
Finnair
Tue, 20 Jan - Sun, 25 Jan
BWI
Baltimore
LHR
London
HK$6,832 Return, found 2 days ago
HK$6,832
Return
found 2 days ago
Select Finnair flight, departing Tue, 20 Jan from Baltimore to London, returning Sun, 25 Jan, priced at HK$6,832 found 2 days ago
Finnair
Thu, 12 Feb - Sun, 22 Feb
BWI
Baltimore
LHR
London
HK$6,856 Return, found 3 days ago
HK$6,856
Return
found 3 days ago
Select Finnair flight, departing Thu, 12 Feb from Baltimore to London, returning Sun, 22 Feb, priced at HK$6,856 found 3 days ago
Finnair
Tue, 20 Jan - Sun, 25 Jan
BWI
Baltimore
LHR
London
HK$6,862 Return, found 2 days ago
HK$6,862
Return
found 2 days ago
Select Finnair flight, departing Tue, 20 Jan from Baltimore to London, returning Sun, 25 Jan, priced at HK$6,862 found 2 days ago

Find the cheapest month to fly from Washington (WAS) to London (LON)

February is typically the cheapest month to fly

From HK$2,581 - HK$5,928 per traveller.
Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Air France, American Airlines, Austrian Airlines, Delta, Finnair, Scandinavian Airlines, United, Virgin Atlantic
Popular airline
American Airlines
Distance
5866 km
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