AirHint found the following cheapest return flights from Singapore (SIN) to Lisbon (LIS) in May 2026 (see full year).

Return flights

11 May - 18 May	Etihad Airways
25 May - 01 Jun	Air France
20 May - 28 May	Etihad Airways
20 May - 31 May	Air France
06 May - 19 May	Etihad Airways
31 May - 10 Jun	Lufthansa
27 May - 03 Jun	Finnair
30 May - 06 Jun	KLM
23 May - 30 May	Air France
17 May - 23 May	Finnair
24 May - 30 May	Lufthansa
29 May - 05 Jun	Lufthansa
29 May - 09 Jun	Emirates
21 May - 31 May	Emirates
09 May - 24 May	TAP

Also check the deals for one-way flights from Singapore to Lisbon in May.

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 May from 567€

Return flights