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

Return flights

28 Aug - 15 Sep	TAP
24 Aug - 06 Sep	Ryanair
27 Aug - 09 Sep	Vueling Airlines
27 Aug - 03 Sep	Vueling Airlines
29 Aug - 05 Sep	Ryanair
28 Aug - 10 Sep	Ryanair
24 Aug - 12 Sep	Vueling Airlines
24 Aug - 11 Sep	Vueling Airlines
25 Aug - 01 Sep	Vueling Airlines
24 Aug - 31 Aug	Vueling Airlines
25 Aug - 12 Sep	Ryanair
22 Aug - 24 Aug	Ryanair
21 Aug - 28 Aug	TAP
22 Aug - 30 Aug	TAP

Also check the deals for one-way flights from Porto 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 Porto to Tokyo in August from 886€

Return flights