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

Return flights

07 Oct - 17 Oct	Wizz Air Malta
01 Oct - 13 Oct	Iberia
15 Oct - 22 Oct	Iberia	direct
01 Oct - 15 Oct	Iberia	direct
01 Oct - 14 Oct	Iberia
01 Oct - 06 Oct	Iberia
06 Oct - 13 Oct	Iberia
06 Oct - 20 Oct	Iberia
06 Oct - 14 Oct	Iberia
15 Oct - 23 Oct	Iberia	direct
30 Oct - 05 Nov	Iberia
30 Oct - 08 Nov	Iberia
30 Oct - 09 Nov	Iberia
28 Oct - 17 Nov	Iberia
24 Oct - 02 Nov	Iberia
25 Oct - 03 Nov	Ryanair

Also check the deals for one-way flights from Madrid to San Juan 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 Madrid to San Juan in October from 554€

Return flights