AirHint found the following cheapest return flights from Porto (OPO) to Singapore (SIN) in October 2025 (see full year).

Return flights

09 Oct - 22 Oct	easyJet
01 Oct - 13 Oct	Lufthansa
09 Oct - 12 Oct	easyJet
19 Oct - 28 Nov	Lufthansa
19 Oct - 21 Nov	Lufthansa
06 Oct - 13 Oct	Wizz Air Malta
03 Oct - 21 Oct	Ryanair
01 Oct - 11 Oct	Ryanair
01 Oct - 05 Oct	Ryanair
06 Oct - 16 Oct	Wizz Air Malta
24 Oct - 02 Nov	Lufthansa
03 Oct - 14 Oct	SWISS
03 Oct - 13 Oct	SWISS

Also check the deals for one-way flights from Porto to Singapore in October.

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 Singapore in October from 578€

Return flights