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

Return flights

09 Sep - 25 Sep	Turkish Airlines
10 Sep - 23 Sep	Turkish Airlines
10 Sep - 17 Sep	Turkish Airlines
01 Sep - 08 Sep	Turkish Airlines
27 Sep - 14 Oct	Turkish Airlines
16 Sep - 15 Oct	Turkish Airlines
16 Sep - 26 Sep	Turkish Airlines
05 Sep - 08 Sep	Turkish Airlines
06 Sep - 27 Sep	Turkish Airlines
02 Sep - 24 Sep	Turkish Airlines
25 Sep - 09 Oct	Air Canada
11 Sep - 19 Sep	Alaska Airlines
17 Sep - 24 Sep	Air Canada
29 Sep - 11 Oct	Air Canada
20 Sep - 06 Oct	Air Canada
01 Sep - 01 Oct	Air Canada
20 Sep - 04 Oct	Air Canada
06 Sep - 03 Oct	Air Canada
26 Sep - 10 Oct	Alaska Airlines
26 Sep - 06 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 $969

Return flights