AirHint found the following cheapest return flights from San Juan (SJU) to Barcelona (BCN) in October 2025 (see full year).

Return flights

06 Oct - 22 Oct	United
12 Oct - 22 Oct	Air France
12 Oct - 21 Oct	United
16 Oct - 31 Oct	United
14 Oct - 26 Oct	United
09 Oct - 18 Oct	Frontier Airlines
08 Oct - 15 Oct	American Airlines
22 Oct - 29 Oct	American Airlines

Also check the deals for one-way flights from San Juan to Barcelona in October.

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 San Juan to Barcelona in October from $461

Return flights