Cheapest one-way flights from Seattle to Tokyo in September from $354

AirHint found the following cheapest one-way flights from Seattle (SEA) to Tokyo (NRT) in September 2025 (see full year).

One-Way flights

19 Sep Asiana Airlines
06 Sep Asiana Airlines
26 Sep Asiana Airlines
03 Sep Asiana Airlines
02 Sep Asiana Airlines
01 Sep Asiana Airlines
04 Sep Asiana Airlines
30 Sep Alaska Airlines direct
03 Sep Alaska Airlines direct
02 Sep Alaska Airlines direct

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

Skyscanner

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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