Cheapest return flights from Washington to London in April from $605

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

Return flights

08 Apr - 15 Apr Air Canada
07 Apr - 14 Apr Finnair
05 Apr - 15 Apr Finnair
10 Apr - 17 Apr Air Canada
16 Apr - 23 Apr Air Canada
04 Apr - 11 Apr jetBlue
06 Apr - 11 Apr jetBlue
27 Apr - 03 May Finnair
05 Apr - 11 Apr jetBlue
15 Apr - 05 May jetBlue
23 Apr - 30 Apr TAP

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

Skyscanner

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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