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

Return flights

05 May - 12 May	United
12 May - 20 May	Iberia	direct
05 May - 12 May	Iberia	direct
12 May - 19 May	British Airways
27 May - 02 Jun	Iberia	direct
04 May - 22 May	Iberia	direct
26 May - 31 May	British Airways	direct
18 May - 27 May	Iberia
18 May - 27 May	Iberia	direct
08 May - 17 May	British Airways
02 May - 09 May	Iberia	direct
25 May - 03 Jun	Iberia
25 May - 03 Jun	Iberia	direct

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

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 May from 583€

Return flights