AirHint found the following cheapest return flights from Boston (BOS) to Tokyo (NRT) in September 2025 (see full year).

Return flights

05 Sep - 17 Sep	WestJet
01 Sep - 14 Sep	Air Canada
01 Sep - 09 Sep	Air Canada
02 Sep - 10 Sep	Air Canada
10 Sep - 18 Sep	Air Canada
15 Sep - 24 Sep	Air Canada
23 Sep - 30 Sep	Air Canada
02 Sep - 09 Sep	Air Canada
03 Sep - 10 Sep	Air Canada
09 Sep - 16 Sep	Air Canada
24 Sep - 01 Oct	Air Canada
21 Sep - 07 Oct	Air Canada
08 Sep - 08 Oct	Air Canada
28 Sep - 05 Oct	Air Canada
29 Sep - 06 Oct	Air Canada
27 Sep - 04 Oct	Air Canada
27 Sep - 11 Oct	Air Canada
16 Sep - 04 Oct	jetBlue
23 Sep - 07 Oct	Cathay Pacific
27 Sep - 13 Oct	Spirit Airlines

Also check the deals for one-way flights from Boston 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 Boston to Tokyo in September from $773

Return flights