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

Return flights

25 Aug - 02 Sep	Asiana Airlines
26 Aug - 02 Sep	Asiana Airlines
18 Aug - 26 Aug	Delta	direct
11 Aug - 20 Aug	Delta	direct
12 Aug - 20 Aug	Delta	direct
26 Aug - 02 Sep	Delta	direct
25 Aug - 25 Sep	United	direct
13 Aug - 20 Aug	Delta	direct
20 Aug - 28 Aug	Delta	direct
12 Aug - 05 Sep	Delta	direct
25 Aug - 02 Sep	Delta	direct
28 Aug - 11 Sep	Asiana Airlines
30 Aug - 11 Sep	United
20 Aug - 19 Sep	United
20 Aug - 18 Sep	United
13 Aug - 23 Aug	Delta	direct
11 Aug - 18 Aug	United
10 Aug - 23 Aug	Delta	direct
20 Aug - 31 Aug	Delta	direct
22 Aug - 29 Aug	Delta	direct

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

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 August from 608€

Return flights