AirHint found the following cheapest return flights from San Juan (SJU) to Madrid (MAD) in September 2026 (see full year).

Return flights

30 Sep - 09 Oct	British Airways
21 Sep - 01 Oct	Iberia
21 Sep - 02 Oct	Iberia
27 Sep - 09 Oct	British Airways	direct
06 Sep - 18 Sep	Iberia
02 Sep - 16 Sep	Iberia
17 Sep - 28 Sep	Iberia	direct
19 Sep - 28 Sep	Iberia
17 Sep - 30 Sep	British Airways
22 Sep - 29 Sep	Iberia	direct
17 Sep - 30 Sep	Iberia	direct
02 Sep - 14 Sep	Iberia
19 Sep - 29 Sep	Iberia
20 Sep - 30 Sep	British Airways
30 Sep - 09 Oct	Iberia	direct
15 Sep - 05 Oct	KLM
15 Sep - 05 Oct	Iberia	direct

Also check the deals for one-way flights from San Juan to Madrid in September.

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 September from 322€

Return flights