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

Return flights

18 Sep - 02 Oct	Frontier Airlines
29 Sep - 11 Oct	Frontier Airlines
29 Sep - 06 Oct	Frontier Airlines
30 Sep - 08 Oct	Delta
29 Sep - 08 Oct	Delta
21 Sep - 28 Sep	Frontier Airlines
30 Sep - 10 Oct	ANA
28 Sep - 12 Oct	Hawaiian Airlines
28 Sep - 15 Oct	Frontier Airlines
29 Sep - 04 Oct	Frontier Airlines
27 Sep - 06 Oct	Air Canada
25 Sep - 30 Sep	Hawaiian Airlines
17 Sep - 30 Sep	Emirates
20 Sep - 27 Sep	Saudia
24 Sep - 27 Sep	Hawaiian Airlines
18 Sep - 22 Sep	Emirates
26 Sep - 30 Sep	Qatar Airways
18 Sep - 22 Sep	ANA	direct
17 Sep - 30 Sep	ANA	direct

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 929€

Return flights