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$146+ Cheap flights from Denver (DEN) to San Juan

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SJU
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to San Juan are usually found in September or October, booked 19 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Denver to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 28, 2025.

Round-trip from

$291
(Frontier)

One-way from

$146
(Cheapflightsfares)

Popular in

December

Cheapest in

September

Average price

$540
From Denver Intl to San Juan
Search Deals
One-way flight from Denver Intl to San Juan
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Highest demand for flights based on searches. 20% potential increase in price ($113 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Denver to San Juan

Cheapest flights from Denver to San Juan
Explore the most affordable flight options available from Denver to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This Frontier deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2211:25 pmDEN - SJU
1 stop8h 25mFrontier
Wed 4/239:30 pmSJU - DEN
1 stop13h 09mFrontier
Deal found 3/28$291
This JetBlue deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/181:35 pmDEN - SJU
1 stop9h 56mJetBlue
Sun 6/2212:35 pmSJU - DEN
1 stop10h 49mJetBlue
Deal found 3/27$330
This Mytrip deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/256:40 pmDEN - SJU
3 stops36h 52mMultiple Airlines
Sat 5/39:32 amSJU - DEN
2 stops23h 59mMultiple Airlines
Deal found 3/26$383
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/267:05 amDEN - SJU
1 stop7h 45mDelta
Sat 8/3012:56 pmSJU - DEN
1 stop11h 23mDelta
Deal found 3/27$413
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:16 amDEN - SJU
2 stops10h 54mAmerican Airlines
Sun 10/511:55 amSJU - DEN
1 stop13h 20mAmerican Airlines
Deal found 3/27$495
This Southwest deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/236:35 amDEN - SJU
1 stop11h 40mSouthwest
Tue 4/296:05 amSJU - DEN
2 stops10h 10mSouthwest
Deal found 3/27$498
This United deal was found by Cheapflights users on 3/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/295:20 amDEN - SJU
1 stop13h 18mUnited Airlines
Mon 5/51:40 pmSJU - DEN
Nonstop6h 31mUnited Airlines
Deal found 3/28$502

Cheapflights Fare Finder

Customize your flight search to find flights from Denver to San Juan that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from Denver to San Juan that are best for you.

Fly from

Denver

Fly to

San Juan

Route

Depart

Return

Price

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 4/22

11:25 pm-9:50 am

1 stop8h 25m

San Juan Luis Munoz Marin Intl

Wed 4/23

9:30 pm-8:39 am

1 stop13h 09m

$291

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Wed 6/18

1:35 pm-1:31 am

1 stop9h 56m

San Juan Luis Munoz Marin Intl

Sun 6/22

12:35 pm-9:24 pm

1 stop10h 49m

$330

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Fri 4/25

6:40 pm-9:32 am

3 stops36h 52m

San Juan Luis Munoz Marin Intl

Sat 5/3

9:32 am-7:31 am

2 stops23h 59m

$383

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 8/26

7:05 am-4:50 pm

1 stop7h 45m

San Juan Luis Munoz Marin Intl

Sat 8/30

12:56 pm-10:19 pm

1 stop11h 23m

$413

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Wed 4/23

6:35 am-8:15 pm

1 stop11h 40m

San Juan Luis Munoz Marin Intl

Tue 4/29

6:05 am-2:15 pm

2 stops10h 10m

$498

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 4/29

5:20 am-8:38 pm

1 stop13h 18m

San Juan Luis Munoz Marin Intl

Mon 5/5

1:40 pm-6:11 pm

Nonstop6h 31m

$502

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Wed 4/23

11:59 pm-12:36 pm

2 stops10h 37m

San Juan Luis Munoz Marin Intl

Wed 5/7

1:30 pm-9:56 pm

2 stops10h 26m

$540

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Fri 4/11

3:27 pm-12:59 am

1 stop7h 32m

$146

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Sat 4/26

6:40 pm-8:26 am

3 stops35h 46m

$175

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Mon 8/11

10:20 pm-12:06 pm

1 stop11h 46m

$210

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/28

Showing 1-10 of 15 results
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Best time to book a flight from Denver to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Denver with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Denver to San Juan

How far ahead should I book a flight from Denver to San Juan?

Use this chart to determine the optimal time to book a round-trip flight from Denver to San Juan. Price data was last updated on March 21, 2025.

The best time to book flights from Denver to San Juan is 19 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Denver to San Juan?

Currently, September is the cheapest month in which you can book a flight from Denver to San Juan (average of $254). Flying from Denver to San Juan in December is currently the most expensive (average of $336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from DEN to SJU?

Find hourly flight availability from Denver to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

It’s optimal to fly from Denver to San Juan in the afternoon. By choosing this option you can save up to 58% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Denver to San Juan?

Use this chart to determine the cheapest time to fly round-trip from Denver to San Juan. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Denver to San Juan flight should consider departing on Monday afternoons when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in San Juan by month

Plan your trip to San Juan by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in San Juan ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit San Juan when rainfall is around 2.2 in.

Temperature in San Juan by month

Plan your trip to San Juan by taking into account the average temperature totals by month.

If weather is an important factor for your trip to San Juan, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Juan. Reviews last updated March 28, 2025.
Get a feel of what it's like to fly with Southwest, Delta and United Airlines from Denver to San Juan by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,923 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,273 reviews

Boarding

8.2

Food

7.1

Crew

8.6

Entertainment

7.6

Comfort

8.1

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from Denver to San Juan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Denver to San Juan?

    If you book a flight to San Juan from Denver, you will be flying from Denver Intl, which is the city’s only airport. Denver Intl (DEN) is located 18.5 mi from the center of Denver. There are 0 flights from Denver Intl to San Juan per day from 6 different airlines.

  • What are the cheapest airlines flying from Denver to San Juan round-trip?

    Frontier, at $291, was found to be the cheapest airline from Denver to San Juan.Alternate airlines to your destination round-trip include JetBlue and Delta. Users have found that Frontier is 34% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Denver to San Juan one-way?

    $146 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on JetBlue and Sun Country Air, with prices starting from $210 and $237, respectively.

  • What are the cheapest flights from Denver to San Juan?

    The cheapest flight price from Denver to San Juan is $303. On average you can expect to pay $870. The most popular route, (Denver Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $278.

  • Where are the most common layover locations when flying from Denver to San Juan?

    Of the flights from Denver to San Juan that have layovers, most of them stop in Orlando. Miami sees the next most layovers on Denver to San Juan flights. Tampa comes in third as the most popular layover location on Denver to San Juan flights.

  • What are some popular things to do or see while on a layover in Orlando?

    The majority of Orlando visitors spend their time at Walt Disney World Resort, Universal Orlando Resort, and International Drive. Travelers on a layover in Orlando can visit Walt Disney World Resort, Universal Orlando Resort, and International Drive, by traveling 16.2 mi, 10.2 mi, and 9.9 mi, respectively after landing at Orlando. Those on a layover in Orlando in need of a rental car can book one at Orlando for about $29.

  • What are some popular points of interest to see during a layover in Miami?

    Most Miami visitors opt to spend their time at Wynwood Art District, Bayside Marketplace, and Bayfront Park. Wynwood Art District, Bayside Marketplace, and Bayfront Park are located about 5.5 mi, 6.4 mi, and 6.4 mi, respectively from Miami. Travelers can book a car rental at Miami for about $24 per day to make their sightseeing more efficient.

  • What are points of interest worth seeing during a layover in Tampa?

    Busch Gardens, University of South Florida Botanical Gardens, and Florida Aquarium are currently the most popular points of interest in Tampa. Busch Gardens, University of South Florida Botanical Gardens and Florida Aquarium are located about 7.9 mi, 8.7 mi, and 5.8 mi, respectively from Tampa if you are interested in checking them out. Travelers in need of a car in Tampa can rent one for about $36 per day.

  • Where are the least popular layover locations for Denver to San Juan flights?

    Of the flights from Denver to San Juan that have layovers, the fewest flights stop in Atlanta. Charlotte sees the next fewest layovers on Denver to San Juan flights. Dallas ranks third to last in terms of the least popular layover locations on Denver to San Juan flights.

  • Can I find deals for flights from Denver to San Juan that include hotel bookings?

    Yes. In addition to deals on Denver to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Denver to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to San Juan.

  • Can I find deals for business class flights from Denver to San Juan?

    Yes. Cheapflights offers flight deals from Denver to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Denver to San Juan?

    Currently, September is the cheapest month in which you can book a flight from Denver to San Juan (average of $254). Flying from Denver to San Juan in December is currently the most expensive (average of $336). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 6 airlines flying from Denver to San Juan

Discover the top 6 airlines that operate flights from Denver to San Juan. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$129Average$289FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$272Average$389FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$469Average$576FlexibilityNo cancel feeOn-time63%
DeltaCheapest$474Average$612FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$474Average$581FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$485Average$675FlexibilityNo cancel feeOn-time69%
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