AirHint found the following cheapest one-way flights from Seattle (SEA) to Tokyo (HND) in January 2026 (see full year).

One-Way flights

19 Jan	Asiana Airlines
18 Jan	Asiana Airlines
19 Jan	Delta	direct
28 Jan	Delta	direct
07 Jan	Delta	direct
11 Jan	Delta	direct
26 Jan	Delta	direct
18 Jan	Delta	direct
14 Jan	Delta	direct
13 Jan	Delta	direct

Also check the deals for return flights from Seattle to Tokyo in January.

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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Cheapest one-way flights from Seattle to Tokyo in January from 274€

One-Way flights