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

Return flights

01 Oct - 08 Oct	United
07 Oct - 14 Oct	United
08 Oct - 15 Oct	United
06 Oct - 22 Oct	Iberia
22 Oct - 29 Oct	United
14 Oct - 21 Oct	United
03 Oct - 10 Oct	United
20 Oct - 27 Oct	United
19 Oct - 26 Oct	United
02 Oct - 09 Oct	United
31 Oct - 07 Nov	United
29 Oct - 05 Nov	United
26 Oct - 02 Nov	United
25 Oct - 01 Nov	United

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 445€

Return flights