Cheapest one-way flights from Seattle (SEA) to London (LGW), October

9 dates in October, from $ 304. Book in one tap, or check whether to buy now or wait.

One-wayReturn
Dates, airline, and price
Dates Airline Price
25 Oct Icelandair
31 Oct Icelandair
26 Oct Icelandair
30 Oct Icelandair
29 Oct Icelandair
18 Oct Condor
23 Oct Icelandair
16 Oct WestJet
15 Oct Frontier Airlines
Powered by

Cheapest deals for the full year

Deals for return flights from Seattle to London in October.

Book a cheap hotel in London

Cheap car rent in Gatwick

Updated Oct 15, 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.