Cheapest return flights from Phoenix to San Juan in December from 269€

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

Return flights

04 Dec - 13 Dec Frontier Airlines
03 Dec - 07 Dec Frontier Airlines
06 Dec - 14 Dec Frontier Airlines
04 Dec - 07 Dec Frontier Airlines
11 Dec - 18 Dec Southwest Airlines
04 Dec - 15 Dec Frontier Airlines
13 Dec - 18 Dec Frontier Airlines
05 Dec - 14 Dec Frontier Airlines
15 Dec - 20 Dec Southwest Airlines
21 Dec - 24 Dec Allegiant Air

Also check the deals for one-way flights from Phoenix 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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