Cheapest return flights from San Francisco to San Juan in December from $306

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

Return flights

12 Dec - 18 Dec Frontier Airlines
12 Dec - 17 Dec jetBlue
05 Dec - 19 Dec Frontier Airlines
12 Dec - 19 Dec Frontier Airlines
02 Dec - 07 Dec Frontier Airlines
03 Dec - 10 Dec Frontier Airlines
13 Dec - 20 Dec United
05 Dec - 18 Dec Sun Country Airlines
22 Dec - 07 Jan Sun Country Airlines
23 Dec - 31 Dec Sun Country Airlines
22 Dec - 31 Dec Sun Country Airlines
30 Dec - 04 Jan jetBlue
29 Dec - 04 Jan Sun Country Airlines
25 Dec - 04 Jan Frontier Airlines

Also check the deals for one-way flights from San Francisco to San Juan in December.

Skyscanner

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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