Cheapest return flights from Washington to London in April from 440€

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

Return flights

20 Apr - 27 Apr TAP
23 Apr - 30 Apr Icelandair
01 Apr - 07 Apr Frontier Airlines
24 Apr - 02 May Icelandair
01 Apr - 10 Apr Frontier Airlines
07 Apr - 16 Apr TAP
15 Apr - 22 Apr SWISS
22 Apr - 05 May SWISS
03 Apr - 10 Apr Frontier Airlines
21 Apr - 29 Apr Iberia
11 Apr - 17 Apr Scandinavian Airlines
16 Apr - 21 Apr TAP
01 Apr - 06 May TAP

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

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