Cheapest return flights from San Francisco to San Juan in December from 358€

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

Return flights

03 Dec - 07 Dec Southwest Airlines
04 Dec - 07 Dec Frontier Airlines
02 Dec - 08 Dec Frontier Airlines
16 Dec - 24 Dec United
16 Dec - 22 Dec United
17 Dec - 23 Dec United
18 Dec - 24 Dec Southwest Airlines
22 Dec - 07 Jan Delta
20 Dec - 03 Jan Frontier Airlines
26 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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