Cheapest return flights from Seattle (SEA) to London (LHR), July

Select a price to book. see full year.

Dates, airline, and price
Dates Airline Price
23 Jul 21 Aug Icelandair
28 Jul 04 Aug Scandinavian Airlines
30 Jul 06 Aug Condor
14 Jul 22 Aug Icelandair
22 Jul 28 Jul Icelandair
24 Jul 10 Aug Scandinavian Airlines
31 Jul 07 Aug Scandinavian Airlines
20 Jul 16 Aug jetBlue
31 Jul 08 Aug Scandinavian Airlines
28 Jul 29 Jul Air Canada
22 Jul 05 Aug Lufthansa
23 Jul 21 Aug British Airways
Direct Flight
19 Jul 26 Jul Icelandair
23 Jul 27 Jul jetBlue
25 Jul 30 Jul Icelandair
16 Jul 25 Jul jetBlue
19 Jul 30 Jul Lufthansa
24 Jul 26 Jul Icelandair
18 Jul 25 Jul jetBlue
25 Jul 31 Jul Scandinavian Airlines
Powered by

deals for one-way flights from Seattle to London in July.

Book a cheap hotel in London

Cheap car rent in Heathrow

Updated Jul 13, 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.