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

Return flights

01 Oct - 07 Oct	Iberia
14 Oct - 21 Oct	United
01 Oct - 09 Oct	Air France
06 Oct - 28 Oct	KLM
08 Oct - 15 Oct	KLM
29 Oct - 06 Nov	Delta
09 Oct - 15 Oct	KLM
24 Oct - 28 Oct	KLM
09 Oct - 16 Oct	United
19 Oct - 26 Oct	United
24 Oct - 31 Oct	United
28 Oct - 05 Nov	Delta
23 Oct - 09 Nov	Air Canada
25 Oct - 27 Nov	United
28 Oct - 05 Nov	Iberia	direct
18 Oct - 02 Nov	Delta
25 Oct - 28 Nov	United
16 Oct - 02 Nov	KLM
17 Oct - 02 Nov	KLM
23 Oct - 09 Nov	Iberia	direct

Also check the deals for one-way flights from San Juan to Madrid 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 Madrid in October from 391€

Return flights