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

Return flights

09 Sep - 23 Sep	Iberia	direct
19 Sep - 30 Sep	Iberia	direct
07 Sep - 13 Sep	British Airways	direct
01 Sep - 20 Sep	British Airways	direct
18 Sep - 25 Sep	Iberia	direct
11 Sep - 20 Sep	British Airways	direct
03 Sep - 08 Sep	Air France
01 Sep - 08 Sep	Air France
03 Sep - 08 Sep	Iberia	direct
01 Sep - 08 Sep	Iberia	direct

Also check the deals for one-way flights from Madrid to San Juan 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 Madrid to San Juan in September from 589€

Return flights