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

Return flights

08 Sep - 16 Sep	Brussels Airlines
20 Sep - 25 Sep	Air Canada
25 Sep - 08 Oct	Austrian Airlines
22 Sep - 25 Sep	LEVEL	direct
25 Sep - 16 Oct	LEVEL	direct
29 Sep - 08 Oct	LEVEL	direct
25 Sep - 03 Oct	LEVEL	direct
22 Sep - 03 Oct	LEVEL	direct
30 Sep - 08 Oct	LEVEL	direct
17 Sep - 22 Sep	LEVEL	direct
19 Sep - 22 Sep	LEVEL	direct
18 Sep - 22 Sep	LEVEL	direct
18 Sep - 25 Sep	LEVEL	direct
25 Sep - 08 Oct	LEVEL	direct
30 Sep - 07 Oct	TAP
08 Sep - 22 Sep	LEVEL	direct
14 Sep - 22 Sep	TAP
08 Sep - 26 Sep	LEVEL	direct
08 Sep - 08 Oct	LEVEL	direct
30 Sep - 11 Oct	LEVEL	direct

Also check the deals for one-way flights from Los Angeles 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 Los Angeles to Barcelona in September from $239

Return flights