AirHint found the following cheapest return flights from Singapore (SIN) to Barcelona (BCN) in September 2025 (see full year).

Return flights

29 Sep - 02 Oct	IndiGo
27 Sep - 07 Oct	IndiGo
27 Sep - 06 Oct	IndiGo
23 Sep - 30 Sep	Turkish Airlines
28 Sep - 07 Oct	China Eastern
29 Sep - 06 Oct	Lufthansa
19 Sep - 02 Oct	Turkish Airlines
27 Sep - 01 Oct	IndiGo
28 Sep - 14 Oct	China Eastern
30 Sep - 12 Oct	China Eastern
21 Sep - 29 Sep	Gulf Air
21 Sep - 28 Sep	Etihad Airways
19 Sep - 26 Sep	Air India
22 Sep - 26 Sep	Qatar Airways
30 Sep - 03 Oct	Lufthansa
25 Sep - 29 Sep	Etihad Airways
28 Sep - 30 Sep	Qatar Airways
23 Sep - 29 Sep	Firefly
19 Sep - 27 Sep	Turkish Airlines
21 Sep - 29 Sep	Singapore Airlines	direct

Also check the deals for one-way flights from Singapore to Barcelona in September.

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 Barcelona in September from 522€

Return flights