Cheapest return flights from Washington to London in April from $535

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

24 Apr - 05 May Brussels Airlines
29 Apr - 20 May Icelandair
28 Apr - 06 May Icelandair
08 Apr - 15 Apr Aer Lingus
23 Apr - 30 Apr Air Canada
28 Apr - 05 May Icelandair
23 Apr - 29 Apr Air Canada
27 Apr - 03 May Icelandair
20 Apr - 29 Apr Iberia direct
29 Apr - 06 May Iberia direct
08 Apr - 15 Apr Iberia direct
22 Apr - 29 Apr Iberia direct
23 Apr - 30 Apr Iberia direct
29 Apr - 20 May Iberia direct
08 Apr - 16 Apr Air Canada
15 Apr - 28 Apr Air Canada
24 Apr - 30 Apr Icelandair
30 Apr - 07 May Icelandair
28 Apr - 28 May Icelandair
30 Apr - 10 May Icelandair

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.

Book a cheap hotel in London

Cheap car rent in London