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

Return flights

27 Aug - 09 Sep	Ryanair
19 Aug - 28 Aug	Ryanair
21 Aug - 31 Aug	Ryanair
28 Aug - 31 Aug	Ryanair
26 Aug - 16 Sep	Ryanair
28 Aug - 02 Sep	Ryanair
25 Aug - 28 Aug	Ryanair
24 Aug - 30 Aug	Vueling Airlines
11 Aug - 28 Aug	Ryanair
19 Aug - 23 Aug	Ryanair
25 Aug - 31 Aug	easyJet
12 Aug - 01 Sep	Ryanair
18 Aug - 23 Aug	Ryanair
06 Aug - 14 Aug	Ryanair
11 Aug - 13 Sep	Transavia France
26 Aug - 07 Sep	Emirates

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 $951

Return flights