Cheapest return flights from Denver to San Juan in August from 245€

AirHint found the following cheapest return flights from Denver (DEN) to San Juan (SJU) in August 2025 (see full year).

Return flights

29 Aug - 31 Aug Frontier Airlines
23 Aug - 30 Aug Frontier Airlines
16 Aug - 30 Aug Frontier Airlines
17 Aug - 18 Aug Frontier Airlines
16 Aug - 23 Aug Frontier Airlines
20 Aug - 27 Aug Frontier Airlines
29 Aug - 05 Sep Frontier Airlines
29 Aug - 01 Sep Frontier Airlines
23 Aug - 30 Aug United direct

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

Skyscanner

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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