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

Return flights

23 Sep - 30 Sep	United
07 Sep - 14 Sep	Spirit Airlines
26 Sep - 03 Oct	United
29 Sep - 06 Oct	United
17 Sep - 30 Sep	Spirit Airlines
02 Sep - 09 Sep	United
08 Sep - 15 Sep	United
05 Sep - 12 Sep	United
11 Sep - 18 Sep	United
20 Sep - 27 Sep	United
14 Sep - 21 Sep	United
17 Sep - 24 Sep	United

Also check the deals for one-way flights from Indianapolis 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 Indianapolis to Barcelona in September from 487€

Return flights