Cheapest one-way flights from Seattle (SEA) to London (LHR), August

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
10 Aug Icelandair
01 Aug Icelandair
23 Aug Icelandair
02 Aug Icelandair
27 Aug Icelandair
31 Aug Icelandair
22 Aug Icelandair
20 Aug Icelandair
30 Aug Icelandair
17 Aug Icelandair
Powered by

deals for return flights from Seattle to London in August.

Book a cheap hotel in London

Cheap car rent in Heathrow

Updated Jul 17, 2026.

About these fares

These results come from our latest search across airlines for your currency. Prices change quickly and are not locked until you complete booking—always confirm the total and fare rules on the partner site.

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