AirHint found the following cheapest one-way flights from Miami (MIA) to San Juan (SJU) in January 2026 (see full year).

One-Way flights

27 Jan	Delta
06 Jan	Spirit Airlines	direct
01 Jan	Spirit Airlines	direct
28 Jan	United
21 Jan	Delta
26 Jan	Southwest Airlines
29 Jan	Spirit Airlines	direct
23 Jan	Spirit Airlines	direct
25 Jan	Spirit Airlines	direct
02 Jan	Spirit Airlines	direct

Also check the deals for return flights from Miami 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 one-way flights from Miami to San Juan in January from 92€

One-Way flights