Cheap flights from Denver to San Juan from $130

If you’re not able to fly to San Juan in April, then January is your next best option. Flight prices from Denver to San Juan during January average around $481.

The cheapest day to depart from Denver to San Juan is on a Tuesday when prices can be found for as low as $656. The most expensive day to fly to San Juan is Saturday, with ticket prices averaging around $780.

The cheapest time of day to fly to San Juan is in the morning when flights can be purchased for as low as $717. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $877 on average. Flights to San Juan from Denver in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Denver Intl to San Juan Luis Munoz Marin Intl for the best Denver Intl - San Juan flight prices

You are more likely to see cheaper flights to San Juan from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $556 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Denver for as low as $466 on momondo.

There are 4 cabin classes available to choose from on Denver to San Juan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier, Southwest, and United Airlines are the most popular carriers operating from Denver Intl to San Juan

Frontier, United Airlines and Southwest are the top three most popular airlines that fly to San Juan from Denver according to our data. Frontier is the first choice among our users, with 38% of people opting to fly with this airline when traveling to San Juan. Keep in mind that there are 6 different airlines that fly to San Juan on a routine basis, so you have a few additional options to choose from.

As of November 2026, there are 1 flights per day flying from Denver to San Juan. The most common time of day flights depart is 9:00AM, with 100% of flights taking off at noon.

As of November 2026, there are 7 flights per week flying from Denver to San Juan. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.