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

Return flights

20 Jan - 27 Jan	Iberia	direct
21 Jan - 27 Jan	Iberia	direct
22 Jan - 31 Jan	Iberia
18 Jan - 26 Jan	Iberia	direct
21 Jan - 01 Feb	Iberia	direct
28 Jan - 01 Feb	Iberia
23 Jan - 02 Feb	Iberia
23 Jan - 03 Feb	Iberia
15 Jan - 29 Jan	British Airways
24 Jan - 02 Feb	Finnair
23 Jan - 30 Jan	Iberia
23 Jan - 31 Jan	Iberia
18 Jan - 30 Jan	Iberia	direct
23 Jan - 01 Feb	Iberia
15 Jan - 30 Jan	British Airways
15 Jan - 31 Jan	British Airways
15 Jan - 07 Feb	British Airways
31 Jan - 08 Feb	British Airways
24 Jan - 08 Feb	British Airways
31 Jan - 07 Feb	British Airways

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 $594

Return flights