Cheapest one-way flights from San Francisco to San Juan in December from 140€

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

15 Dec Frontier Airlines
29 Dec Frontier Airlines
08 Dec Frontier Airlines
30 Dec Frontier Airlines
11 Dec Frontier Airlines
24 Dec Frontier Airlines
13 Dec Frontier Airlines
25 Dec Frontier Airlines
19 Dec Frontier Airlines
22 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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