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

Return flights

12 Sep - 17 Sep	Air Canada
24 Sep - 08 Oct	Air Canada
22 Sep - 01 Oct	Air Canada
16 Sep - 15 Oct	Air Canada
13 Sep - 19 Sep	Air Canada
29 Sep - 11 Oct	Air Canada
03 Sep - 19 Sep	Air Canada
18 Sep - 28 Sep	Air Canada
01 Sep - 22 Sep	Air Canada
01 Sep - 14 Sep	jetBlue
10 Sep - 23 Sep	Alaska Airlines
02 Sep - 09 Sep	Air Canada
26 Sep - 16 Oct	Air Canada
01 Sep - 13 Sep	Cathay Pacific
22 Sep - 07 Oct	Cathay Pacific
04 Sep - 19 Sep	Japan Airlines

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 $1115

Return flights