AirHint found the following cheapest one-way flights from Seattle (SEA) to London (LHR) in October 2026 (see full year).
One-Way flights
| 01 Oct | Icelandair | ||
| 23 Oct | jetBlue | ||
| 21 Oct | jetBlue | ||
| 22 Oct | jetBlue | ||
| 20 Oct | jetBlue | ||
| 02 Oct | jetBlue | ||
| 29 Oct | Alaska Airlines | ||
| 21 Oct | KLM | direct | |
| 20 Oct | KLM | direct | |
| 26 Oct | United |
Also check the deals for return flights from Seattle to London in October.
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