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

Return flights

17 Jan - 26 Jan	Korean Air
10 Jan - 17 Jan	Japan Airlines
10 Jan - 24 Jan	Japan Airlines
15 Jan - 30 Jan	Korean Air
29 Jan - 06 Feb	Korean Air
18 Jan - 25 Jan	Korean Air
13 Jan - 26 Jan	Korean Air
29 Jan - 05 Feb	Korean Air
14 Jan - 21 Jan	Japan Airlines
14 Jan - 22 Jan	Japan Airlines
21 Jan - 29 Jan	Korean Air
15 Jan - 26 Jan	Japan Airlines
30 Jan - 07 Feb	Delta	direct
31 Jan - 07 Feb	United	direct
30 Jan - 15 Feb	ANA	direct
22 Jan - 09 Feb	Delta	direct
29 Jan - 06 Feb	United	direct
30 Jan - 06 Feb	United	direct
25 Jan - 01 Feb	United	direct
29 Jan - 05 Feb	United	direct

Also check the deals for one-way 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 return flights from Seattle to Tokyo in January from $618

Return flights