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

Return flights

19 Jan - 26 Jan	Finnair	direct
18 Jan - 26 Jan	Iberia	direct
24 Jan - 02 Feb	Iberia
12 Jan - 22 Jan	British Airways
13 Jan - 27 Jan	British Airways
16 Jan - 22 Jan	British Airways
24 Jan - 31 Jan	Iberia	direct
30 Jan - 06 Feb	Iberia	direct
23 Jan - 01 Feb	Iberia	direct
15 Jan - 24 Jan	British Airways
16 Jan - 25 Jan	British Airways
08 Jan - 16 Jan	Iberia
14 Jan - 23 Jan	Iberia

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

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 Madrid to San Juan in January from 508€

Return flights