AirHint found the following cheapest return flights from Washington (IAD) to London (LGW) in June 2026 (see full year).

Return flights

05 Jun - 12 Jun	Icelandair
02 Jun - 06 Jun	Icelandair
08 Jun - 18 Jun	Icelandair
09 Jun - 16 Jun	Icelandair
11 Jun - 16 Jun	Icelandair
10 Jun - 16 Jun	Icelandair
10 Jun - 17 Jun	Icelandair
02 Jun - 09 Jun	Icelandair
06 Jun - 11 Jun	Icelandair
05 Jun - 20 Jun	Icelandair
29 Jun - 06 Jul	Icelandair
28 Jun - 05 Jul	Icelandair
28 Jun - 07 Jul	Icelandair
19 Jun - 01 Jul	Icelandair
29 Jun - 07 Jul	Icelandair
25 Jun - 09 Jul	Icelandair
28 Jun - 12 Jul	Icelandair
29 Jun - 12 Jul	Icelandair
29 Jun - 09 Jul	Icelandair
29 Jun - 05 Jul	Icelandair

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

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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Cheapest return flights from Washington to London in June from 629€

Return flights