AirHint found the following cheapest one-way flights from Seattle (SEA) to London (LHR) in November 2025 (see full year).
One-Way flights
| 22 Nov | Alaska Airlines | ||
| 25 Nov | Alaska Airlines | ||
| 21 Nov | WestJet | ||
| 18 Nov | WestJet | ||
| 26 Nov | Air Canada | ||
| 14 Nov | WestJet | ||
| 17 Nov | Air Canada | ||
| 13 Nov | Frontier Airlines | ||
| 20 Nov | Alaska Airlines | ||
| 19 Nov | Alaska Airlines |
Also check the deals for return flights from Seattle to London in November.
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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.
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