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

Return flights

01 Dec - 10 Dec	Iberia
02 Dec - 09 Dec	Iberia	direct
03 Dec - 11 Dec	Iberia	direct
01 Dec - 09 Dec	Iberia
31 Dec - 15 Jan	American Airlines
04 Dec - 10 Dec	Iberia	direct
04 Dec - 11 Dec	Iberia	direct
05 Dec - 12 Dec	Iberia	direct
04 Dec - 15 Jan	Iberia
02 Dec - 13 Dec	United
29 Dec - 13 Jan	British Airways
08 Dec - 14 Dec	British Airways
08 Dec - 14 Dec	Iberia	direct
07 Dec - 11 Jan	United
23 Dec - 10 Jan	Iberia
30 Dec - 14 Jan	Iberia
06 Dec - 10 Jan	Iberia
11 Dec - 08 Jan	Iberia
24 Dec - 12 Jan	Avianca
24 Dec - 06 Jan	Avianca

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

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 December from $439

Return flights