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

Return flights

30 Aug - 13 Sep	British Airways	direct
04 Aug - 11 Aug	British Airways
03 Aug - 12 Aug	Iberia
24 Aug - 06 Sep	Iberia
18 Aug - 27 Aug	British Airways
01 Aug - 12 Aug	Iberia
14 Aug - 26 Aug	British Airways
01 Aug - 08 Aug	Iberia
21 Aug - 30 Aug	Iberia
17 Aug - 26 Aug	British Airways
22 Aug - 01 Sep	British Airways
22 Aug - 31 Aug	British Airways
17 Aug - 26 Aug	Iberia	direct

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 619€

Return flights