Cheapest return flights from Buffalo to San Juan in December from $231

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

Return flights

06 Dec - 12 Dec Frontier Airlines
07 Dec - 10 Dec Southwest Airlines
12 Dec - 15 Dec Frontier Airlines
12 Dec - 16 Dec Frontier Airlines
27 Dec - 04 Jan Frontier Airlines
26 Dec - 02 Jan Frontier Airlines
17 Dec - 22 Dec Delta

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

Powered by

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.

Book a cheap hotel in San Juan

Cheap car rent in San Juan

Feel free to contact us with any feedback or request another flight research.