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

Return flights

27 Sep - 09 Oct	Ryanair	direct
27 Sep - 16 Oct	Ryanair	direct
30 Sep - 09 Oct	Ryanair	direct
30 Sep - 16 Oct	Ryanair	direct
27 Sep - 30 Sep	Ryanair
04 Sep - 09 Sep	Ryanair	direct
27 Sep - 04 Oct	Ryanair	direct
30 Sep - 02 Oct	Ryanair
30 Sep - 04 Oct	Ryanair	direct
27 Sep - 29 Sep	Ryanair
06 Sep - 09 Sep	Ryanair	direct
27 Sep - 07 Oct	Ryanair	direct
02 Sep - 09 Sep	Ryanair
27 Sep - 11 Oct	Ryanair	direct
03 Sep - 09 Sep	Ryanair
20 Sep - 09 Oct	Ryanair	direct
27 Sep - 30 Sep	Ryanair	direct
20 Sep - 27 Sep	Ryanair	direct
20 Sep - 23 Sep	Ryanair	direct
04 Sep - 06 Sep	Ryanair	direct

Also check the deals for one-way flights from Warsaw 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 Warsaw to Barcelona in September from $138

Return flights