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

Return flights

05 Jun - 15 Jun	TAP
05 Jun - 08 Jun	TAP
08 Jun - 17 Jun	Icelandair
07 Jun - 20 Jun	Allegiant Air
10 Jun - 04 Jul	Air Canada
06 Jun - 13 Jun	TAP
22 Jun - 30 Jun	Porter Airlines (Canada) Ltd
09 Jun - 04 Jul	Aer Lingus
03 Jun - 27 Jun	Porter Airlines (Canada) Ltd
03 Jun - 24 Jun	TAP
27 Jun - 04 Jul	TAP
12 Jun - 04 Jul	Porter Airlines (Canada) Ltd
20 Jun - 11 Jul	TAP
18 Jun - 28 Jun	TAP
13 Jun - 27 Jun	TAP
24 Jun - 18 Jul	TAP
25 Jun - 02 Jul	TAP
19 Jun - 07 Jul	TAP
25 Jun - 05 Jul	TAP
18 Jun - 05 Jul	Turkish Airlines

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 $875

Return flights