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

Return flights

29 Aug - 06 Sep	jetBlue
26 Aug - 09 Sep	Iberia	direct
26 Aug - 02 Sep	Iberia	direct
26 Aug - 17 Sep	Iberia	direct
28 Aug - 11 Sep	Iberia	direct
26 Aug - 27 Sep	Iberia
29 Aug - 11 Sep	Iberia
29 Aug - 09 Sep	Iberia
26 Aug - 11 Sep	Iberia	direct
31 Aug - 13 Sep	Iberia	direct
23 Aug - 25 Aug	British Airways
22 Aug - 25 Aug	British Airways
18 Aug - 25 Aug	British Airways
21 Aug - 25 Aug	British Airways
17 Aug - 22 Aug	Ryanair
23 Aug - 29 Aug	Ryanair
26 Aug - 31 Aug	Lufthansa
03 Aug - 14 Aug	Vueling Airlines
20 Aug - 23 Aug	WORLD2FLY
05 Aug - 09 Aug	Condor

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

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 August from 530€

Return flights