AirHint found the following cheapest return flights from Seattle (SEA) to Tokyo (HND) in December 2025 (see full year).

Return flights

08 Dec - 15 Dec	Asiana Airlines
09 Dec - 18 Dec	United	direct
08 Dec - 24 Dec	United
10 Dec - 20 Dec	United	direct
08 Dec - 15 Dec	Delta	direct
08 Dec - 22 Dec	United
01 Dec - 17 Dec	United	direct
08 Dec - 24 Dec	Delta	direct
10 Dec - 21 Dec	ANA	direct
06 Dec - 12 Dec	Delta	direct
31 Dec - 07 Jan	United	direct
15 Dec - 17 Jan	Delta	direct
27 Dec - 07 Jan	Delta	direct
13 Dec - 14 Jan	United
13 Dec - 14 Jan	ANA	direct
12 Dec - 06 Jan	Alaska Airlines
24 Dec - 07 Jan	Delta
12 Dec - 08 Jan	Alaska Airlines
26 Dec - 05 Jan	Delta	direct
27 Dec - 05 Jan	Delta	direct

Also check the deals for one-way flights from Seattle to Tokyo in December.

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.

Book a cheap hotel in Tokyo

Cheap car rent in Tokyo

Cheapest return flights from Seattle to Tokyo in December from 550€

Return flights