AirHint found the following cheapest return flights from Washington (IAD) to London (LHR) in February 2026 (see full year).

Return flights

18 Feb - 01 Mar	TAP
15 Feb - 02 Mar	TAP
25 Feb - 05 Mar	TAP
26 Feb - 05 Mar	TAP
23 Feb - 03 Mar	TAP
25 Feb - 01 Mar	TAP
15 Feb - 01 Mar	TAP
09 Feb - 22 Feb	TAP
03 Feb - 22 Feb	TAP
01 Feb - 15 Feb	TAP
08 Feb - 18 Feb	TAP
13 Feb - 16 Feb	TAP
06 Feb - 15 Feb	TAP
05 Feb - 15 Feb	TAP
06 Feb - 18 Feb	TAP
03 Feb - 13 Feb	TAP
06 Feb - 08 Feb	TAP
25 Feb - 07 Mar	TAP
20 Feb - 01 Mar	Icelandair
11 Feb - 01 Mar	Icelandair

Also check the deals for one-way flights from Washington to London in February.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Washington to London in February from $422

Return flights