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

Return flights

16 Sep - 30 Sep	Oman Air
07 Sep - 16 Sep	Hainan Airlines
25 Sep - 01 Oct	Oman Air
25 Sep - 02 Oct	Oman Air
03 Sep - 24 Sep	Turkmenistan Airlines
28 Sep - 08 Oct	Indonesia AirAsia
29 Sep - 06 Oct	Batik Air Malaysia
03 Sep - 23 Sep	Turkmenistan Airlines
24 Sep - 01 Oct	Emirates
01 Sep - 16 Sep	Scoot
27 Sep - 02 Oct	Saudia
12 Sep - 13 Sep	Batik Air Malaysia
12 Sep - 17 Sep	Etihad Airways
05 Sep - 12 Sep	Etihad Airways
01 Sep - 31 Oct	Emirates
11 Sep - 17 Sep	Etihad Airways
15 Sep - 18 Sep	Etihad Airways

Also check the deals for one-way flights from Kuala Lumpur 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 Kuala Lumpur to Barcelona in September from 580€

Return flights