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

Return flights

03 Dec - 11 Dec	Iberia	direct
01 Dec - 09 Dec	British Airways
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
31 Dec - 15 Jan	United
08 Dec - 14 Dec	Iberia	direct
09 Dec - 14 Dec	Iberia	direct
10 Dec - 17 Dec	Iberia	direct
06 Dec - 14 Dec	Frontier Airlines
07 Dec - 11 Jan	United
30 Dec - 14 Jan	Iberia
06 Dec - 10 Jan	Frontier Airlines
07 Dec - 06 Jan	Arajet
30 Dec - 12 Jan	Avianca
11 Dec - 08 Jan	Frontier Airlines
23 Dec - 10 Jan	Hahn Air Technologies
24 Dec - 12 Jan	Spirit Airlines

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 390€

Return flights