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

Return flights

07 Dec - 16 Dec	KLM
02 Dec - 13 Dec	United
08 Dec - 15 Dec	United
02 Dec - 13 Dec	Iberia	direct
31 Dec - 13 Jan	KLM
24 Dec - 08 Jan	United
08 Dec - 15 Dec	Iberia	direct
07 Dec - 16 Dec	Finnair	direct
13 Dec - 29 Dec	KLM
15 Dec - 30 Dec	Delta
13 Dec - 29 Dec	Finnair	direct
31 Dec - 06 Jan	Iberia
29 Dec - 07 Jan	Iberia
15 Dec - 30 Dec	Iberia	direct
30 Dec - 10 Jan	United
21 Dec - 06 Jan	Avianca
19 Dec - 06 Jan	Avianca
26 Dec - 03 Jan	Avianca
23 Dec - 03 Jan	Avianca
28 Dec - 04 Jan	United

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 437€

Return flights