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

Return flights

09 Dec - 16 Dec	United
02 Dec - 16 Dec	United
04 Dec - 11 Dec	United
08 Dec - 22 Dec	Finnair	direct
09 Dec - 23 Dec	Finnair
10 Dec - 21 Dec	Finnair	direct
24 Dec - 12 Jan	United
11 Dec - 25 Dec	United
14 Dec - 24 Dec	Iberia	direct
11 Dec - 21 Dec	Finnair
25 Dec - 06 Jan	Avianca
24 Dec - 08 Jan	Avianca
24 Dec - 31 Dec	United
25 Dec - 08 Jan	Avianca
26 Dec - 07 Jan	Avianca
29 Dec - 13 Jan	KLM
20 Dec - 03 Jan	Avianca
24 Dec - 07 Jan	KLM
18 Dec - 04 Jan	Avianca
29 Dec - 08 Jan	KLM

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 399€

Return flights