Cheapest return flights from Denver to San Juan in January from 120€

AirHint found the following cheapest return flights from Denver (DEN) to San Juan (SJU) in January 2026 (see full year).

Return flights

08 Jan - 12 Jan Frontier Airlines
09 Jan - 18 Jan Frontier Airlines
23 Jan - 30 Jan Frontier Airlines
24 Jan - 02 Feb Frontier Airlines
05 Jan - 18 Jan Frontier Airlines
15 Jan - 22 Jan Frontier Airlines
18 Jan - 24 Jan Frontier Airlines
06 Jan - 11 Jan Frontier Airlines
28 Jan - 07 Feb Frontier Airlines
05 Jan - 14 Jan Frontier Airlines
04 Jan - 14 Jan Frontier Airlines
15 Jan - 20 Jan Frontier Airlines

Also check the deals for one-way flights from Denver to San Juan in January.

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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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