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

Return flights

30 Sep - 07 Oct	United
20 Sep - 02 Oct	Iberia
20 Sep - 30 Sep	Air France
23 Sep - 03 Oct	Air France
21 Sep - 08 Oct	Air France
24 Sep - 09 Oct	Air France
23 Sep - 09 Oct	United
23 Sep - 04 Oct	Iberia	direct
23 Sep - 06 Oct	Iberia	direct
01 Sep - 19 Sep	British Airways	direct
09 Sep - 16 Sep	Iberia	direct
18 Sep - 25 Sep	United
22 Sep - 28 Sep	KLM
22 Sep - 29 Sep	KLM
23 Sep - 05 Oct	Air France
18 Sep - 03 Oct	Air France
09 Sep - 25 Sep	United
15 Sep - 30 Sep	Air France
15 Sep - 23 Sep	Air France
16 Sep - 24 Sep	Delta

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.

Book a cheap hotel in Madrid

Cheap car rent in Madrid

Cheapest return flights from San Juan to Madrid in September from 392€

Return flights