Cheapest one-way flights from Denver to San Juan in December from $100

AirHint found the following cheapest one-way flights from Denver (DEN) to San Juan (SJU) in December 2025 (see full year).

One-Way flights

30 Dec Frontier Airlines
16 Dec Frontier Airlines
04 Dec Frontier Airlines
07 Dec Frontier Airlines
29 Dec Frontier Airlines
02 Dec Frontier Airlines
23 Dec Frontier Airlines
03 Dec Frontier Airlines
22 Dec Frontier Airlines
28 Dec Frontier Airlines

Also check the deals for return flights from Denver 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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