Cheapest return flights from Denver to San Juan in August from 221€

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

Return flights

14 Aug - 28 Aug Frontier Airlines
01 Aug - 03 Aug Frontier Airlines
01 Aug - 04 Aug Frontier Airlines
10 Aug - 13 Aug Frontier Airlines
11 Aug - 15 Aug Frontier Airlines
25 Aug - 28 Aug Frontier Airlines
10 Aug - 15 Aug Frontier Airlines
02 Aug - 04 Aug Frontier Airlines
07 Aug - 14 Aug Frontier Airlines
16 Aug - 18 Aug Frontier Airlines
27 Aug - 01 Sep Frontier Airlines
22 Aug - 05 Sep United
27 Aug - 10 Sep United
24 Aug - 07 Sep United
29 Aug - 12 Sep United
23 Aug - 06 Sep United direct
25 Aug - 08 Sep United
19 Aug - 02 Sep United
21 Aug - 04 Sep United
20 Aug - 03 Sep United

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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