Cheapest one-way flights from Washington to London in April from $362

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

One-Way flights

21 Apr TAP
27 Apr TAP
15 Apr Icelandair
13 Apr TAP
22 Apr Icelandair
30 Apr Icelandair
11 Apr TAP
18 Apr TAP

Also check the deals for return 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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