Our cheapest offers for flights from London to Washington DC

Here you can compare cheap flights from London (LON) to Washington DC (WAS) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Washington DC. Prices and availability may change at any time.

	Outbound	Return	Airlines	Baggage	Price
London Washington-DC	Outbound 02/02/26 1 Stopover (KEF) FI0451, FI0645 11h 15min	Return 16/02/26 1 Stopover (KEF) FI0644, FI0450 10h 10min	Icelandair		£325
Best option London Washington-DC	Outbound 20/03/26 direct BA0293 08h 30min	Return 17/04/26 direct BA0292 07h 25min	British Airways	?	£504
London Washington-DC Please note: transfer for connecting flight	Outbound 31/01/26 1 Stopover (CDG) U28411, AF0050 14h 25min	Return 03/02/26 1 Stopover (DUB) EI0116, FR0112 10h 15min	easyJet, Air France		£1,631
London Washington-DC	Outbound 02/02/26 1 Stopover (KEF) FI0451, FI0645 11h 15min	Return 16/02/26 1 Stopover (KEF) FI0644, FI0450 10h 10min	Icelandair		£329
London Washington-DC	Outbound 02/02/26 1 Stopover (KEF) FI0451, FI0645 11h 15min	Return 16/02/26 1 Stopover (KEF) FI0644, FI0450 10h 10min	Icelandair		£336
London Washington-DC	Outbound 02/02/26 1 Stopover (KEF) FI0451, FI0645 11h 15min	Return 16/02/26 1 Stopover (KEF) FI0644, FI0450 10h 10min	Icelandair		£345
London Washington-DC	Outbound 20/03/26 1 Stopover (LIS) TP1363, TP0233 20h 00min	Return 17/04/26 1 Stopover (LIS) TP0232, TP1364 20h 45min	TAP Air Portugal		£388
London Washington-DC	Outbound 20/03/26 1 Stopover (LIS) TP1363, TP0233 20h 00min	Return 17/04/26 1 Stopover (LIS) TP0232, TP1356 12h 15min	TAP Air Portugal	?	£394
London Washington-DC	Outbound 02/02/26 1 Stopover (KEF) FI0451, FI0645 11h 15min	Return 16/02/26 1 Stopover (KEF) FI0644, FI0450 10h 10min	Icelandair	?	£397
London Washington-DC	Outbound 31/01/26 1 Stopover (LIS) TP1363, TP0231 14h 15min	Return 03/02/26 1 Stopover (LIS) TP0232, TP1366 24h 10min	TAP Air Portugal		£407

Tips and tricks to help you find cheap flights from London to Washington DC

Important flight information

Flight information: London - Washington-DC

Outbound and return from	£ 324,99
Flight duration	min. 08:20 / max. 08:45
Return flight duration	min. 07:00/ max. 08:22
Distance	5903 km
Flights per week	52
Departure airport	Airport London (LCY, LGW, LHR, LTN, STN, SEN) (LON)
Arrival airport	Airport Washington-DC (WAS)
Destination country	Flights to United States

Alternative routes to United States

Flight London - New York from £ 260
Flight London - Los Angeles from £ 347
Flight London - San Francisco from £ 404
Flight London - Miami from £ 430
Flight London - Orlando from £ 271
Flight London - Chicago from £ 394
Flight London - Las Vegas from £ 480
Flight London - Boston from £ 370
Flight London - Seattle-Tacoma from £ 353
Flight London - Santa Ana, CA from £ 477

Flight destinations with a similar price

Flight London - Los Angeles from £ 347
Flight London - Hong Kong from £ 295
Flight London - Tokyo from £ 322
Flight London - Colombo from £ 300
Flight London - Mauritius from £ 327
Flight London - Calgary from £ 319
Flight London - Seattle-Tacoma from £ 353
Flight London - Saigon from £ 336
Flight London - Chennai from £ 311
Flight London - Seoul from £ 350