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

Return flights

05 May - 19 May	Iberia	direct
05 May - 12 May	Air Canada
07 May - 14 May	Iberia	direct
13 May - 29 May	Avianca
12 May - 02 Jun	Avianca
05 May - 12 May	Iberia	direct
12 May - 28 May	Avianca
30 May - 13 Jun	Avianca
28 May - 10 Jun	Avianca
31 May - 12 Jun	Avianca
12 May - 21 May	Avianca
21 May - 29 May	Avianca
18 May - 01 Jun	Avianca
17 May - 30 May	Avianca
21 May - 07 Jun	Avianca
07 May - 18 May	Iberia
19 May - 04 Jun	Iberia
19 May - 02 Jun	Iberia
21 May - 04 Jun	Avianca
21 May - 04 Jun	Iberia	direct

Also check the deals for one-way flights from San Juan to Madrid 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 San Juan to Madrid in May from $569

Return flights