Cheapest return flights from Seattle to London in August from 396€

AirHint found the following cheapest return flights from Seattle (SEA) to London (LHR) in August 2025 (see full year).

Return flights

04 Aug - 23 Sep Aer Lingus
04 Aug - 12 Aug Virgin Atlantic direct
13 Aug - 20 Aug KLM
13 Aug - 20 Aug Virgin Atlantic direct
11 Aug - 18 Aug Icelandair
18 Aug - 27 Aug Virgin Atlantic
03 Aug - 19 Aug Delta
11 Aug - 29 Aug Delta
12 Aug - 20 Aug Delta
24 Aug - 04 Sep Air France
05 Aug - 14 Aug Virgin Atlantic
03 Aug - 14 Aug Delta
24 Aug - 03 Sep Delta
26 Aug - 03 Sep Delta
20 Aug - 10 Sep Virgin Atlantic
20 Aug - 03 Sep Delta
20 Aug - 02 Sep Virgin Atlantic
24 Aug - 04 Sep British Airways direct
24 Aug - 03 Sep British Airways direct
26 Aug - 03 Sep Virgin Atlantic direct

Also check the deals for one-way flights from Seattle to London in August.

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

Feel free to contact us with any feedback or request another flight research.