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

Return flights

08 Sep - 22 Sep	Air Canada
20 Sep - 30 Sep	Philippine Airlines
20 Sep - 01 Oct	Philippine Airlines
09 Sep - 20 Sep	Air Canada
21 Sep - 05 Oct	Korean Air
29 Sep - 08 Oct	Japan Airlines	direct
20 Sep - 02 Oct	Japan Airlines	direct
08 Sep - 24 Sep	United
05 Sep - 12 Sep	Air Canada
21 Sep - 05 Oct	Japan Airlines	direct
04 Sep - 18 Sep	Japan Airlines
22 Sep - 23 Sep	STARLUX Airlines
22 Sep - 23 Sep	Japan Airlines	direct
20 Sep - 30 Sep	Alaska Airlines	direct
04 Sep - 18 Sep	Alaska Airlines	direct

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

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 September from 540€

Return flights