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

Return flights

30 Sep - 07 Oct	transavia	direct
29 Sep - 01 Oct	transavia	direct
29 Sep - 04 Oct	transavia	direct
29 Sep - 03 Oct	transavia	direct
30 Sep - 04 Oct	transavia	direct
22 Sep - 23 Sep	transavia	direct
29 Sep - 05 Oct	transavia	direct
23 Sep - 26 Sep	transavia	direct
29 Sep - 02 Oct	transavia
24 Sep - 03 Oct	transavia
29 Sep - 02 Oct	transavia	direct
28 Sep - 05 Oct	transavia	direct
24 Sep - 26 Sep	transavia
23 Sep - 30 Sep	transavia
23 Sep - 25 Sep	transavia
19 Sep - 24 Sep	transavia
20 Sep - 24 Sep	transavia
21 Sep - 24 Sep	transavia
24 Sep - 26 Sep	transavia	direct
24 Sep - 25 Sep	transavia

Also check the deals for one-way flights from Rotterdam 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 Rotterdam to Barcelona in September from 125€

Return flights