$144 Cheap Flights from Denver (DEN) to San Juan (SJU)

View $144 flight on Mon, Dec 8, 2025Opens in a new window

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

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

Prices were available within the past 7 days and start at $144 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
Fri, Sep 26 - Thu, Oct 2
DEN
Denver
SJU
San Juan
$266 Roundtrip, found 3 hours ago
$266
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Fri, Sep 26 from Denver to San Juan, returning Thu, Oct 2, priced at $266 found 3 hours ago
Frontier Airlines
Sat, Sep 20 - Tue, Sep 23
DEN
Denver
SJU
San Juan
$276 Roundtrip, just found
$276
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Sep 20 from Denver to San Juan, returning Tue, Sep 23, priced at $276 just found
Frontier Airlines
Fri, Sep 26 - Thu, Oct 2
DEN
Denver
SJU
San Juan
$277 Roundtrip, found 3 hours ago
$277
Roundtrip
found 3 hours ago
Select Frontier Airlines flight, departing Fri, Sep 26 from Denver to San Juan, returning Thu, Oct 2, priced at $277 found 3 hours ago
Frontier Airlines
Sat, Nov 15 - Mon, Nov 17
DEN
Denver
SJU
San Juan
$283 Roundtrip, found 7 hours ago
$283
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Sat, Nov 15 from Denver to San Juan, returning Mon, Nov 17, priced at $283 found 7 hours ago
Frontier Airlines
Fri, Oct 24 - Fri, Oct 31
DEN
Denver
SJU
San Juan
$284 Roundtrip, found 16 hours ago
$284
Roundtrip
found 16 hours ago
Select Frontier Airlines flight, departing Fri, Oct 24 from Denver to San Juan, returning Fri, Oct 31, priced at $284 found 16 hours ago
Frontier Airlines
Sat, Nov 1 - Wed, Nov 5
DEN
Denver
SJU
San Juan
$285 Roundtrip, found 1 hour ago
$285
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, Nov 1 from Denver to San Juan, returning Wed, Nov 5, priced at $285 found 1 hour ago
JetBlue Airways
Thu, Oct 2 - Sun, Oct 5
DEN
Denver
SJU
San Juan
$319 Roundtrip, just found
$319
Roundtrip
just found
Select JetBlue Airways flight, departing Thu, Oct 2 from Denver to San Juan, returning Sun, Oct 5, priced at $319 just found
Southwest Airlines
Thu, Nov 13 - Tue, Nov 18
DEN
Denver
SJU
San Juan
$443 Roundtrip, just found
$443
Roundtrip
just found
Select Southwest Airlines flight, departing Thu, Nov 13 from Denver to San Juan, returning Tue, Nov 18, priced at $443 just found
Delta
Tue, Dec 2 - Thu, Dec 11
DEN
Denver
SJU
San Juan
$495 Roundtrip, just found
$495
Roundtrip
just found
Select Delta flight, departing Tue, Dec 2 from Denver to San Juan, returning Thu, Dec 11, priced at $495 just found
United
Thu, Nov 13 - Tue, Nov 18
DEN
Denver
SJU
San Juan
$506 Roundtrip, just found
$506
Roundtrip
just found
Select United flight, departing Thu, Nov 13 from Denver to San Juan, returning Tue, Nov 18, priced at $506 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 - $304 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 $306
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $306
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, Sun Country Airlines, United
Roundtrip price
$266
Distance
2730 mi
Average flight time
4 hours 40 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 September. 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 $144 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?
Grab a cheap one-way flight from $144 or cheap return flight from $266 from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
The cheapest month to fly from DEN to SJU is September, when there's less demand. Off-peak season is generally when airlines offer better prices between these airports.
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 Denver Intl. Airport (DEN) to Luis Munoz Marin Intl. Airport (SJU)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest DEN to SJU flight.
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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*Available to One Key members.