Cheapest one-way flights from San Francisco to San Juan in December from 131€

AirHint found the following cheapest one-way flights from San Francisco (SFO) to San Juan (SJU) in December 2025 (see full year).

One-Way flights

30 Dec Frontier Airlines
31 Dec Frontier Airlines
14 Dec Frontier Airlines
28 Dec Frontier Airlines
23 Dec Frontier Airlines
27 Dec Frontier Airlines
03 Dec Delta
24 Dec Frontier Airlines
20 Dec Frontier Airlines
19 Dec Frontier Airlines

Also check the deals for return flights from San Francisco to San Juan in December.

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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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