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

Return flights

02 Sep - 16 Sep	Air Canada
16 Sep - 10 Oct	Air Canada
02 Sep - 02 Oct	Air Canada
23 Sep - 30 Sep	Air Canada
30 Sep - 09 Oct	Air Canada
21 Sep - 26 Sep	Air Canada
22 Sep - 26 Sep	Air Canada
09 Sep - 12 Sep	Air Canada
08 Sep - 19 Sep	Air Canada
02 Sep - 23 Sep	Air Canada
03 Sep - 23 Sep	Air Canada
07 Sep - 18 Sep	Air Canada
22 Sep - 03 Oct	Air Canada
07 Sep - 20 Sep	Air Canada
25 Sep - 01 Oct	Air Canada
22 Sep - 03 Oct	Japan Airlines	direct
25 Sep - 01 Oct	Japan Airlines	direct
16 Sep - 04 Oct	Emirates

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 617€

Return flights