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

Return flights

26 Aug - 01 Sep	Iberia	direct
26 Aug - 09 Sep	Iberia	direct
28 Aug - 01 Sep	Iberia	direct
26 Aug - 31 Aug	Iberia	direct
28 Aug - 31 Aug	Iberia	direct
31 Aug - 11 Sep	Iberia	direct
27 Aug - 07 Sep	Iberia	direct
30 Aug - 07 Sep	Iberia
26 Aug - 05 Sep	Iberia	direct
26 Aug - 06 Sep	Iberia	direct
29 Aug - 06 Sep	Iberia
29 Aug - 05 Sep	Iberia
20 Aug - 31 Aug	Iberia	direct
21 Aug - 31 Aug	Iberia	direct
25 Aug - 31 Aug	Iberia	direct
18 Aug - 27 Aug	Iberia
17 Aug - 31 Aug	Iberia	direct
24 Aug - 31 Aug	Iberia	direct
22 Aug - 31 Aug	Iberia	direct
23 Aug - 31 Aug	Iberia

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 558€

Return flights