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

Return flights

26 Aug - 10 Sep	Air Canada
30 Aug - 05 Sep	Air Canada
28 Aug - 04 Sep	Air Canada
29 Aug - 05 Sep	Air Canada
31 Aug - 07 Sep	Air Canada
30 Aug - 06 Sep	Air Canada
23 Aug - 06 Sep	Air Canada
23 Aug - 30 Aug	Spirit Airlines
25 Aug - 31 Aug	Frontier Airlines
26 Aug - 02 Sep	Air Canada
24 Aug - 31 Aug	Air Canada
22 Aug - 30 Aug	Air Canada
21 Aug - 02 Sep	Cathay Pacific
20 Aug - 31 Aug	United
25 Aug - 01 Sep	Air Canada
19 Aug - 27 Aug	Spirit Airlines
20 Aug - 31 Aug	Japan Airlines	direct
19 Aug - 27 Aug	Japan Airlines	direct

Also check the deals for one-way flights from Boston to Tokyo in August.

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 August from $785

Return flights