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

Return flights

21 Sep - 30 Sep	Air France
20 Sep - 07 Oct	Iberia
20 Sep - 08 Oct	Iberia
24 Sep - 09 Oct	British Airways
24 Sep - 08 Oct	Air France
23 Sep - 30 Sep	United
22 Sep - 30 Sep	United
17 Sep - 02 Oct	Air France
20 Sep - 14 Oct	Iberia
30 Sep - 15 Oct	Air Canada
01 Sep - 18 Sep	Iberia	direct
20 Sep - 07 Oct	American Airlines	direct
09 Sep - 17 Sep	American Airlines	direct
09 Sep - 16 Sep	British Airways	direct
03 Sep - 09 Sep	American Airlines	direct
09 Sep - 07 Oct	American Airlines	direct
25 Sep - 07 Oct	KLM
22 Sep - 28 Sep	Delta
08 Sep - 16 Sep	Air France
20 Sep - 30 Sep	British Airways

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 $460

Return flights