AirHint found the following cheapest return flights from Washington (IAD) to Tokyo (HND) in September 2025 (see full year).

Return flights

15 Sep - 30 Sep	Air Canada
17 Sep - 30 Sep	Air Canada
15 Sep - 21 Sep	Air Canada
28 Sep - 05 Oct	Air Canada
20 Sep - 26 Sep	Air Canada
07 Sep - 23 Sep	Hawaiian Airlines
15 Sep - 08 Oct	Air Canada
23 Sep - 28 Oct	Air Canada
23 Sep - 01 Oct	Air Canada
09 Sep - 23 Sep	Hawaiian Airlines
29 Sep - 06 Oct	Air Canada
16 Sep - 23 Sep	Air Canada
14 Sep - 17 Sep	Air Canada
07 Sep - 14 Sep	Frontier Airlines
17 Sep - 20 Oct	Air Canada
19 Sep - 04 Oct	Air Canada
17 Sep - 16 Oct	Delta
22 Sep - 03 Oct	Delta
07 Sep - 17 Sep	Korean Air
25 Sep - 01 Oct	Air Canada

Also check the deals for one-way flights from Washington 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 Washington to Tokyo in September from 808€

Return flights