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

Return flights

01 Sep - 14 Sep	Korean Air
01 Sep - 15 Sep	Korean Air
02 Sep - 16 Sep	Korean Air
14 Sep - 22 Sep	Korean Air
01 Sep - 13 Sep	Philippine Airlines
10 Sep - 21 Sep	Korean Air
14 Sep - 28 Sep	Japan Airlines
24 Sep - 04 Oct	Philippine Airlines
30 Sep - 31 Oct	Korean Air
01 Sep - 15 Sep	Japan Airlines	direct
14 Sep - 22 Sep	Japan Airlines	direct
02 Sep - 16 Sep	American Airlines	direct
30 Sep - 31 Oct	Japan 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 $648

Return flights