Cheapest one-way flights from Denver to San Juan in March from $135

AirHint found the following cheapest one-way flights from Denver (DEN) to San Juan (SJU) in March 2026 (see full year).

One-Way flights

29 Mar Frontier Airlines
22 Mar Frontier Airlines
27 Mar Frontier Airlines
05 Mar Frontier Airlines
18 Mar Frontier Airlines
05 Mar United direct
27 Mar United direct
29 Mar United direct
22 Mar United direct

Also check the deals for return flights from Denver to San Juan in March.

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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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