Cheapest return flights from San Diego to San Juan in December from 288€

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

Return flights

07 Dec - 10 Dec Southwest Airlines
03 Dec - 10 Dec Frontier Airlines
04 Dec - 13 Dec Frontier Airlines
03 Dec - 13 Dec Frontier Airlines
04 Dec - 08 Dec Frontier Airlines
03 Dec - 07 Dec Frontier Airlines
04 Dec - 14 Dec Frontier Airlines
04 Dec - 15 Dec Frontier Airlines
11 Dec - 14 Dec Southwest Airlines
30 Dec - 14 Jan Southwest Airlines
11 Dec - 19 Dec Southwest Airlines

Also check the deals for one-way flights from San Diego 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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