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San Juan

$111+ 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SJU
Feb 21 — Feb 281
Sat 2/21
Sat 2/28
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to San Juan are usually found in August or May, booked 23 days in advance, depart on a Tuesday or Thursday and return on a Thursday

Cheap 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 January 22, 2026.

This Expedia deal was found by Cheapflights users on 1/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1811:25 pm
DEN
-
SJU
1 stop24h 10m
Frontier
Mon 2/236:00 am
SJU
-
DEN
1 stop29h 21m
Frontier
Deal found 1/22$203
This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/319:20 am
DEN
-
SJU
1 stop26h 09m
Frontier
Tue 4/73:09 pm
SJU
-
DEN
1 stop9h 59m
Frontier
Deal found 1/20$211
This Frontier deal was found by Cheapflights users on 1/21. 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.
Thu 2/2610:44 am
DEN
-
SJU
1 stop10h 57m
Frontier
Fri 2/2711:55 am
SJU
-
DEN
1 stop12h 47m
Frontier
Deal found 1/21$212
This Kiwi.com deal was found by Cheapflights users on 1/21. 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.
Fri 4/1011:59 pm
DEN
-
SJU
1 stop8h 20m
Frontier
Mon 4/136:07 pm
SJU
-
DEN
1 stop18h 23m
Frontier
Deal found 1/21$214
This CheapOair deal was found by Cheapflights users on 1/22. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:24 pm
DEN
-
SJU
1 stop28h 29m
Frontier
Fri 2/206:00 am
SJU
-
DEN
1 stop18h 42m
Frontier
Deal found 1/22$217
This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/511:59 pm
DEN
-
SJU
1 stop23h 59m
Frontier
Tue 3/106:39 pm
SJU
-
DEN
1 stop15h 47m
Frontier
Deal found 1/20$220
This CheapOair deal was found by Cheapflights users on 1/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/57:24 pm
DEN
-
SJU
1 stop28h 34m
Frontier
Sun 3/83:08 am
SJU
-
DEN
1 stop22h 01m
Frontier
Deal found 1/20$221
This Frontier deal was found by Cheapflights users on 1/20. 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 2/2412:59 am
DEN
-
SJU
1 stop11h 07m
Frontier
Wed 3/1110:04 am
SJU
-
DEN
1 stop15h 05m
Frontier
Deal found 1/20$223
This Frontier deal was found by Cheapflights users on 1/19. 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.
Mon 2/2310:00 am
DEN
-
SJU
1 stop13h 25m
Frontier
Wed 2/2511:07 am
SJU
-
DEN
1 stop14h 52m
Frontier
Deal found 1/19$224

Find 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 January 22, 2026.

Round-trip from

$203
(Expedia)

One-way from

$111
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$377
From Denver Intl to San Juan
Search Deals
One-way flight from Denver Intl to San Juan
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 22, 2026.
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

Thu 3/12

4:05 pm-1:12 am

1 stop7h 07m

San Juan Luis Munoz Marin Intl

Tue 3/17

6:01 am-1:55 pm

1 stop9h 54m

$349

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Wed 2/25

10:35 am-11:10 pm

2 stops9h 35m

San Juan Luis Munoz Marin Intl

Wed 3/4

5:40 am-2:05 pm

2 stops11h 25m

$376

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Thu 3/12

4:05 pm-1:12 am

1 stop7h 07m

San Juan Luis Munoz Marin Intl

Wed 3/18

11:45 am-9:43 pm

1 stop11h 58m

$385

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Thu 3/19

2:50 pm-1:25 am

1 stop8h 35m

San Juan Luis Munoz Marin Intl

Tue 3/24

5:01 am-1:55 pm

1 stop10h 54m

$392

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Wed 4/15

10:50 am-10:40 pm

2 stops9h 50m

San Juan Luis Munoz Marin Intl

Tue 4/21

3:45 pm-10:05 pm

1 stop8h 20m

$424

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Thu 4/30

11:55 pm-12:10 pm

1 stop10h 15m

San Juan Luis Munoz Marin Intl

Mon 5/4

2:00 pm-10:45 pm

2 stops10h 45m

$460

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Wed 4/15

9:43 am-5:38 pm

Nonstop5h 55m

San Juan Luis Munoz Marin Intl

Tue 4/21

1:40 pm-6:15 pm

Nonstop6h 35m

$507

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 7/14

9:43 am-5:30 pm

Nonstop5h 47m

San Juan Luis Munoz Marin Intl

Tue 8/4

2:55 pm-11:27 pm

1 stop10h 32m

$512

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 4/21

9:43 am-5:38 pm

Nonstop5h 55m

San Juan Luis Munoz Marin Intl

Mon 4/27

1:00 am-8:23 am

1 stop9h 23m

$512

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Thu 5/14

9:43 am-5:38 pm

Nonstop5h 55m

San Juan Luis Munoz Marin Intl

Wed 5/20

7:20 am-2:49 pm

1 stop9h 29m

$512

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 22 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 January 16, 2026.

The best time to book flights from Denver to San Juan is 23 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, April is the cheapest month in which you can book a flight from Denver to San Juan (average of $130). Flying from Denver to San Juan in December is currently the most expensive (average of $293). 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 January 22, 2026.

When flying from Denver to San Juan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Denver to San Juan

Explore weekly flight availability from Denver to San Juan. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 22, 2026.

The most flights from DEN to PR1 are scheduled on a Monday (1 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (1 on average).

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 January 22, 2026.
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
4,267 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,267 reviews
Southwest
8.0
Very good
4,267 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,192 reviews
Southwest
8.0
Very good
4,267 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,177 reviews
Southwest
8.0
Very good
4,267 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
JetBlue
7.2
Good
2,891 reviews
Southwest
8.0
Very good
4,267 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,267 reviews

Food

7.0

Crew

8.6

Entertainment

7.5

Boarding

8.1

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

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 is 1 flight from Denver Intl to San Juan per day from 6 different airlines.

  • How long is the flight from Denver to San Juan?

    There are many flights that can get you from Denver to San Juan in 7h 07m. Fly via JetBlue or Southwest to get the fastest option. The distance from Denver to San Juan is about 2730 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Frontier, at $154, 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 67% cheaper than the other options available to this destination.

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

    $90 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 Delta, with prices starting from $136 and $174, respectively.

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

    The cheapest flight price from Denver to San Juan is $304. On average you can expect to pay $936. The most popular route, (Denver Intl - San Juan Luis Munoz Marin Intl), can usually be booked for $182.

  • 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.

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

    The majority of Orlando visitors spend their time at Universal Orlando Resort, Walt Disney World Resort, and International Drive. Travelers on a layover in Orlando can visit Universal Orlando Resort, Walt Disney World Resort, and International Drive, by traveling 10.2 mi, 16.2 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 $32.

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

    Most Miami visitors opt to spend their time at Kaseya Center, Bayfront Park, and Bayside Marketplace. Kaseya Center, Bayfront Park, and Bayside Marketplace are located about 6.2 mi, 6.4 mi, and 6.4 mi, respectively from Miami. Travelers can book a car rental at Miami for about $33 per day to make their sightseeing more efficient.

  • 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 Tampa. 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, April is the cheapest month in which you can book a flight from Denver to San Juan (average of $130). Flying from Denver to San Juan in December is currently the most expensive (average of $293). 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 January 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$154Average$307FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$299Average$429FlexibilityNo cancel feeOn-time62%
DeltaCheapest$328Average$653FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$439Average$589FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$485Average$593FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$486Average$674FlexibilityNo cancel feeOn-time69%

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