Cheapest return flights from Washington to London in April from $510

Best time to book flights for Washington (IAD) to London (LHR) flights at AirHint

AirHint found the following cheapest return flights from Washington (IAD) to London (LHR) in April 2025 (see full year).

Return flights

08 Apr - 22 Apr Icelandair
02 Apr - 15 Apr Icelandair
02 Apr - 14 Apr Icelandair
04 Apr - 15 Apr Icelandair
23 Apr - 29 Apr Icelandair
02 Apr - 16 Apr Icelandair
24 Apr - 30 Apr Icelandair
03 Apr - 13 Apr Icelandair
25 Apr - 30 Apr Icelandair
23 Apr - 30 Apr Icelandair
23 Apr - 07 May Icelandair
26 Apr - 03 May Icelandair
29 Apr - 16 May Icelandair
29 Apr - 15 May Icelandair
24 Apr - 05 May Icelandair
24 Apr - 04 May Icelandair
23 Apr - 15 May Icelandair
24 Apr - 12 May Icelandair
24 Apr - 01 May Icelandair
23 Apr - 09 May Icelandair

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

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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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