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

Return flights

21 Oct - 28 Oct	United
01 Oct - 09 Oct	Air France
27 Oct - 13 Nov	Air France
01 Oct - 21 Oct	Air France
15 Oct - 22 Oct	United
13 Oct - 21 Oct	KLM
19 Oct - 31 Oct	United
24 Oct - 31 Oct	United
03 Oct - 10 Oct	United
06 Oct - 13 Oct	United
25 Oct - 10 Nov	KLM
10 Oct - 22 Oct	United
30 Oct - 13 Nov	Air France
29 Oct - 05 Nov	United
21 Oct - 04 Nov	United
29 Oct - 05 Nov	Iberia	direct
21 Oct - 04 Nov	Iberia	direct
16 Oct - 02 Nov	British Airways
16 Oct - 02 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 389€

Return flights