$139 Cheap Flights from Denver (DEN) to San Juan (SJU)

View $139 flight on Tue, Aug 5, 2025Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)

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Cheap Flights from Denver to San Juan (DEN-SJU)

Prices were available within the past 7 days and start at $139 for one-way flights and $266 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Aug 16 - Fri, Aug 22
DEN
Denver
SJU
San Juan
$266 Roundtrip, found 3 hours ago
$266
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Sat, Aug 16 from Denver to San Juan, returning Fri, Aug 22, priced at $266 found 3 hours ago
Frontier Airlines
Sat, Aug 16 - Fri, Aug 22
DEN
Denver
SJU
San Juan
$272 Roundtrip, found 3 hours ago
$272
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Sat, Aug 16 from Denver to San Juan, returning Fri, Aug 22, priced at $272 found 3 hours ago
Frontier Airlines
Sat, Aug 9 - Tue, Aug 12
DEN
Denver
SJU
San Juan
$275 Roundtrip, found 2 hours ago
$275
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Aug 9 from Denver to San Juan, returning Tue, Aug 12, priced at $275 found 2 hours ago
Frontier Airlines
Sat, Jul 19 - Tue, Jul 22
DEN
Denver
SJU
San Juan
$278 Roundtrip, just found
$278
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Jul 19 from Denver to San Juan, returning Tue, Jul 22, priced at $278 just found
Frontier Airlines
Sat, Aug 9 - Tue, Aug 12
DEN
Denver
SJU
San Juan
$280 Roundtrip, found 2 hours ago
$280
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Aug 9 from Denver to San Juan, returning Tue, Aug 12, priced at $280 found 2 hours ago
Frontier Airlines
Sat, Sep 27 - Mon, Sep 29
DEN
Denver
SJU
San Juan
$281 Roundtrip, found 12 hours ago
$281
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Sat, Sep 27 from Denver to San Juan, returning Mon, Sep 29, priced at $281 found 12 hours ago
JetBlue Airways
Wed, Aug 13 - Sun, Aug 17
DEN
Denver
SJU
San Juan
$303 Roundtrip, found 5 hours ago
$303
Roundtrip
found 5 hours ago
Select JetBlue Airways flight, departing Wed, Aug 13 from Denver to San Juan, returning Sun, Aug 17, priced at $303 found 5 hours ago
Southwest Airlines
Mon, Nov 3 - Tue, Nov 4
DEN
Denver
SJU
San Juan
$392 Roundtrip, found 5 hours ago
$392
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Mon, Nov 3 from Denver to San Juan, returning Tue, Nov 4, priced at $392 found 5 hours ago
American Airlines
Wed, Oct 22 - Wed, Oct 29
DEN
Denver
SJU
San Juan
$495 Roundtrip, just found
$495
Roundtrip
just found
Select American Airlines flight, departing Wed, Oct 22 from Denver to San Juan, returning Wed, Oct 29, priced at $495 just found
Delta
Wed, Oct 22 - Wed, Oct 29
DEN
Denver
SJU
San Juan
$495 Roundtrip, just found
$495
Roundtrip
just found
Select Delta flight, departing Wed, Oct 22 from Denver to San Juan, returning Wed, Oct 29, priced at $495 just found

Find the cheapest month to fly from Denver (DEN) to San Juan (SJU)

October is typically the cheapest month to fly

From $138 - $337 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $316
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $316
Flights from Denver (DEN) to San Juan (SJU)
Origin airport
Denver Intl.
Destination airport
Luis Munoz Marin Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$266
Distance
2730 mi
Average flight time
4 hours 47 mins

Denver to San Juan Flights

The cheapest times to fly from Denver to San Juan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to San Juan are during the month of August. You can find some of the cheapest flights from Denver to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to San Juan

Sunday is one of the best days to book for cheap flights from Denver to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to San Juan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $139 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU) cost?
You'll find affordable return tickets from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU) starting from $486. Reserve your seat and set off on your next adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United flight leaving DEN on August 8 2025 and touching down at SJU. The price was last updated on July 13 2025 and has not changed since.
What is the cheapest month to fly from DEN to SJU?
The cheapest flights from DEN to SJU are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
Take a nonstop flight with United Airlines and journey straight from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU).
What is the cheapest airline that flies from DEN to SJU?
With prices starting from $303 for a one-way flight from DEN to SJU, United is currently the cheapest airline for this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from DEN on October 8 2025. Prices were last updated on July 13 2025 and have not changed since.
How many flights per day from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
On average, you'll only find 1 direct flight operating from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU) per day. If this doesn't work for you, check out flights with layovers. Simply filter your search on Expedia to include one or more stops to discover the next best option.
What are the most popular departure times for flights from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
Flights between DEN and SJU are busiest at 9 AM. If you'd like a less crowded experience and potentially cheaper prices, choose a departure that's outside typical rush times.
What day of the week has the most flights from DEN to SJU?
Travel on a Monday if you're searching for the best selection of flights from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU).
What is the earliest flight from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
Hop on the earliest flight at around 9:46AM UTC-7, departing from Denver Intl. Airport (DEN). You'll be flying for about 5h 39m, landing at Luis Munoz Marin Intl. Airport (SJU) at approximately 6:25PM UTC-4.
How long does it take to fly from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
It takes roughly 5 hours and 39 minutes to cover the 2,700 mi from DEN to SJU.
What is the best time to fly from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
To avoid potential delays on the Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU) route, fly before 3 PM. Later departures are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for San Juan from Denver Intl. Airport (DEN)?
Luis Munoz Marin Intl. Airport (SJU) is the only airport in San Juan with direct flights from Denver Intl. Airport (DEN). Explore your options and discover affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Waiting until right before your break to book a ticket from DEN to SJU often results in higher prices. While you may find some last-minute discounts, they aren't always guaranteed. Be flexible with your itinerary for a better chance of getting a bargain.
Can I cancel or change the date of my flight from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
If you booked your DEN to SJU flight in the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for further details.

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