Cheapest return flights from Washington to London in April from $528

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

03 Apr - 13 Apr Icelandair
04 Apr - 13 Apr Icelandair
04 Apr - 12 Apr Icelandair
02 Apr - 09 Apr Icelandair
15 Apr - 21 Apr Icelandair
01 Apr - 09 Apr Icelandair
21 Apr - 28 Apr Icelandair
01 Apr - 06 Apr Icelandair
01 Apr - 07 Apr Icelandair
02 Apr - 06 Apr Icelandair
24 Apr - 06 May Icelandair
23 Apr - 06 May Icelandair
17 Apr - 03 May Icelandair
26 Apr - 11 May Icelandair
19 Apr - 03 May Scandinavian Airlines
23 Apr - 06 May British Airways direct
24 Apr - 06 May British Airways direct
24 Apr - 01 May United direct
17 Apr - 03 May British Airways direct
19 Apr - 03 May British Airways direct

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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