Cheapest return flights from Washington to London in April from $439

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

Return flights

20 Apr - 20 May TAP
27 Apr - 11 May TAP
20 Apr - 29 Apr TAP
20 Apr - 19 May TAP
23 Apr - 04 May TAP
12 Apr - 16 Apr Icelandair
24 Apr - 30 Apr TAP
14 Apr - 20 Apr Icelandair
18 Apr - 25 Apr Icelandair
17 Apr - 24 Apr Icelandair
15 Apr - 19 Apr Icelandair
24 Apr - 27 Apr Icelandair
17 Apr - 20 Apr Icelandair
16 Apr - 21 Apr Icelandair
19 Apr - 15 May Icelandair
24 Apr - 02 May Icelandair
15 Apr - 03 May Icelandair
24 Apr - 03 May Icelandair
25 Apr - 01 May Icelandair
27 Apr - 01 May Icelandair

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

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