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

Return flights

01 Oct - 06 Oct	Turkish Airlines
17 Oct - 23 Oct	Air France
01 Oct - 07 Oct	Turkish Airlines
01 Oct - 14 Oct	Turkish Airlines
04 Oct - 12 Oct	Qatar Airways
10 Oct - 17 Oct	Qatar Airways
06 Oct - 15 Oct	Lufthansa
15 Oct - 21 Oct	TAP
16 Oct - 21 Oct	TAP

Also check the deals for one-way flights from Singapore to Lisbon 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 Singapore to Lisbon in October from $743

Return flights