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

Return flights

08 Sep - 14 Sep	Qatar Airways
29 Sep - 21 Oct	Emirates
10 Sep - 19 Sep	Qatar Airways
11 Sep - 18 Sep	Qatar Airways
11 Sep - 21 Sep	Singapore Airlines
12 Sep - 19 Sep	Qatar Airways
13 Sep - 21 Sep	Emirates
21 Sep - 06 Oct	Qatar Airways
21 Sep - 21 Oct	Emirates

Also check the deals for one-way flights from Adelaide 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.

Book a cheap hotel in Barcelona

Cheap car rent in Barcelona

Cheapest return flights from Adelaide to Barcelona in September from $1426

Return flights