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$134+ 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 8/17. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SJU
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to San Juan are usually found in October or September, booked 22 days in advance, depart on a Thursday or Tuesday 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 August 14, 2025.

Round-trip from

$261
(Kiwi.com)

One-way from

$134
(Mytrip)

Popular in

December

Cheapest in

October

Average price

$338
From Denver Intl to San Juan
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One-way flight from Denver Intl to San Juan
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Highest demand for flights based on searches. 18% potential increase in price ($105 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 14, 2025.

This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1311:40 amDEN - SJU
2 stops24h 03mMultiple Airlines
Fri 9/197:50 pmSJU - DEN
1 stop15h 25mMultiple Airlines
Deal found 8/14$261
This Mytrip deal was found by Cheapflights users on 8/14. 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.
Thu 9/2512:59 amDEN - SJU
1 stop12h 52mFrontier
Fri 10/39:07 amSJU - DEN
1 stop10h 48mFrontier
Deal found 8/14$268
This Priceline deal was found by Cheapflights users on 8/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2412:59 amDEN - SJU
1 stop11h 39mFrontier
Sat 10/257:58 pmSJU - DEN
1 stop14h 45mFrontier
Deal found 8/14$269
This Cheapflightsfares deal was found by Cheapflights users on 8/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2612:25 amDEN - SJU
1 stop7h 17mFrontier
Sun 11/22:11 amSJU - DEN
1 stop9h 24mFrontier
Deal found 8/14$275
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/136:59 pmDEN - SJU
1 stop16h 44mMultiple Airlines
Sun 9/212:38 pmSJU - DEN
1 stop18h 42mMultiple Airlines
Deal found 8/14$276
This Priceline deal was found by Cheapflights users on 8/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/612:36 amDEN - SJU
1 stop9h 24mFrontier
Sat 10/117:58 pmSJU - DEN
1 stop14h 45mFrontier
Deal found 8/14$277
This Frontier deal was found by Cheapflights users on 8/14. 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.
Fri 9/1211:59 pmDEN - SJU
1 stop13h 23mFrontier
Thu 9/1812:28 amSJU - DEN
1 stop10h 29mFrontier
Deal found 8/14$278
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/611:59 pmDEN - SJU
1 stop12h 38mFrontier
Wed 11/1212:29 pmSJU - DEN
1 stop13h 47mFrontier
Deal found 8/13$280
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/136:59 pmDEN - SJU
1 stop16h 44mMultiple Airlines
Thu 9/182:38 pmSJU - DEN
1 stop18h 42mMultiple Airlines
Deal found 8/14$281
This deal was found by Cheapflights users on 8/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:44 amDEN - SJU
1 stop12h 15mFrontier
Fri 9/2612:28 amSJU - DEN
1 stop10h 29mFrontier
Deal found 8/13$282

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 August 14, 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

Wed 10/8

12:36 am-3:32 pm

1 stop12h 56m

San Juan Luis Munoz Marin Intl

Sun 10/12

9:06 pm-8:33 am

1 stop13h 27m

$268

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Wed 10/8

1:44 pm-2:30 am

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Sun 10/12

9:06 pm-8:33 am

1 stop13h 27m

$268

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Thu 10/9

11:45 pm-12:45 am

1 stop23h 00m

San Juan Luis Munoz Marin Intl

Mon 10/13

3:40 am-12:44 pm

1 stop11h 04m

$268

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Fri 10/10

11:45 pm-12:45 am

1 stop23h 00m

San Juan Luis Munoz Marin Intl

Fri 10/17

1:59 am-8:58 am

1 stop8h 59m

$268

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Sun 11/2

11:59 pm-1:22 pm

1 stop10h 23m

San Juan Luis Munoz Marin Intl

Thu 11/6

2:11 am-8:35 am

1 stop9h 24m

$269

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Sun 11/9

9:15 am-11:04 am

1 stop22h 49m

San Juan Luis Munoz Marin Intl

Wed 11/26

1:59 am-8:25 am

1 stop9h 26m

$269

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Fri 8/22

9:02 am-7:08 pm

1 stop8h 06m

San Juan Luis Munoz Marin Intl

Thu 9/18

12:28 am-8:57 am

1 stop10h 29m

$269

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Fri 10/24

12:59 am-2:38 pm

1 stop11h 39m

San Juan Luis Munoz Marin Intl

Sun 11/2

12:11 pm-8:35 am

1 stop23h 24m

$269

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Sun 10/26

12:34 am-7:56 pm

1 stop17h 22m

San Juan Luis Munoz Marin Intl

Mon 11/3

10:39 pm-11:16 pm

1 stop27h 37m

$269

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Mon 10/20

12:36 am-2:30 am

1 stop23h 54m

San Juan Luis Munoz Marin Intl

Sun 10/26

1:59 am-8:58 am

1 stop8h 59m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 19 results
1
2

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 August 8, 2025.

The best time to book flights from Denver to San Juan is 22 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 June is currently the most expensive (average of $339). 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 August 14, 2025.

It’s optimal to fly from Denver to San Juan in the afternoon. By choosing this option you can save up to 59% 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.

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 August 14, 2025.
Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from Denver to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,916 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
JetBlue
7.2
Good
2,914 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,219 reviews
Southwest
8.0
Very good
4,244 reviews

Crew

8.6

Comfort

8.0

Overall

8.0

Entertainment

7.5

Boarding

8.1

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 $133, was found to be the cheapest airline from Denver to San Juan.Alternate airlines to your destination round-trip include JetBlue and Southwest. Users have found that Frontier is 70% cheaper than the other options available to this destination.

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

    The cheapest flight price from Denver to San Juan is $423. On average you can expect to pay $608. The most popular route, (Denver Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $268.

  • 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 $33.

  • 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, Bayfront Park, and Kaseya Center. Wynwood Art District, Bayfront Park, and Kaseya Center are located about 5.5 mi, 6.4 mi, and 6.2 mi, respectively from Miami. Travelers can book a car rental at Miami for about $29 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 $34 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.

  • 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 June is currently the most expensive (average of $339). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$133Average$288FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$276Average$427FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$449Average$586FlexibilityNo cancel feeOn-time63%
DeltaCheapest$475Average$662FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$485Average$681FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$494Average$584FlexibilityNo cancel feeOn-time71%

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