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

Return flights

06 Jul - 20 Jul	ITA Airways
10 Jul - 13 Jul	ITA Airways
09 Jul - 12 Jul	ITA Airways
08 Jul - 13 Jul	ITA Airways
08 Jul - 18 Jul	Lufthansa
15 Jul - 21 Jul	Icelandair
15 Jul - 05 Aug	Lufthansa
01 Jul - 06 Jul	ITA Airways
14 Jul - 21 Jul	Icelandair
23 Jul - 30 Jul	Lufthansa
17 Jul - 05 Aug	Air Canada
23 Jul - 30 Jul	British Airways	direct
15 Jul - 05 Aug	British Airways	direct
17 Jul - 05 Aug	British Airways	direct

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

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 July from $695

Return flights