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

Return flights

01 May - 12 May	Avianca
18 May - 27 May	Avianca
14 May - 28 May	British Airways	direct
19 May - 28 May	Iberia
11 May - 20 May	Iberia
01 May - 10 May	Avianca
04 May - 11 May	Iberia
05 May - 16 May	Iberia
01 May - 03 May	TAP
01 May - 10 May	Iberia	direct
23 May - 06 Jun	Iberia

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 $642

Return flights