Cheapest return flights from Washington to London in April from $532

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

01 Apr - 06 Apr Icelandair
07 Apr - 12 Apr Icelandair
04 Apr - 19 Apr Icelandair
09 Apr - 16 Apr Icelandair
07 Apr - 09 May Icelandair
03 Apr - 18 Apr Icelandair
09 Apr - 16 Apr Delta direct
10 Apr - 23 Apr British Airways direct
11 Apr - 20 Apr SWISS
11 Apr - 19 Apr Air Canada
11 Apr - 19 Apr British Airways direct
07 Apr - 09 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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