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

Return flights

23 Sep - 01 Oct	Frontier Airlines
23 Sep - 17 Oct	Frontier Airlines
29 Sep - 19 Oct	Frontier Airlines
23 Sep - 30 Sep	Frontier Airlines
23 Sep - 07 Oct	Frontier Airlines
30 Sep - 07 Oct	Frontier Airlines
23 Sep - 10 Oct	Frontier Airlines
29 Sep - 06 Oct	Air Canada
20 Sep - 25 Sep	Frontier Airlines

Also check the deals for one-way flights from Cleveland 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 Cleveland to Barcelona in September from $413

Return flights