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Cheap flights from Denver to San Juan from $123

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to San Juan departing on 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Denver to San Juan

Cheap round-trip flights

Frontier Logo
11:45 pm - 10:57 amDEN-SJU
9h 12m1 stop
Frontier Logo
9:06 pm - 8:33 amSJU-DEN
13h 27m1 stop
$268Frontier
Find Deal
Thu, Oct 23 - Sun, Oct 26
Frontier Logo
12:59 am - 3:14 pmDEN-SJU
11h 15m1 stop
Frontier Logo
9:00 am - 6:26 pmSJU-DEN
12h 26m1 stop
$269Frontier
Find Deal
Sat, Nov 8 - Wed, Nov 19
Frontier Logo
4:50 pm - 9:55 amDEN-SJU
14h 05m1 stop
Frontier Logo
6:59 pm - 9:08 amSJU-DEN
17h 09m1 stop
$270Frontier
Find Deal
Mon, Feb 9 - Fri, Feb 20
Frontier Logo
12:16 am - 11:19 amDEN-SJU
8h 03m1 stop
Frontier Logo
6:01 am - 12:29 pmSJU-DEN
9h 28m1 stop
$272Frontier
Find Deal
Tue, Nov 18 - Thu, Nov 27
Frontier Logo
9:19 pm - 6:58 pmDEN-SJU
19h 39m2 stops
Frontier Logo
11:48 am - 10:59 pmSJU-DEN
13h 11m2 stops
$273Frontier
Find Deal
Fri, Oct 17 - Fri, Oct 24
Multiple Airlines Logo
8:13 pm - 3:46 pmDEN-SJU
16h 33m1 stop
Multiple Airlines Logo
11:02 am - 4:48 pmSJU-DEN
8h 46m1 stop
$275Multiple Airlines
Find Deal
Tue, Nov 18 - Thu, Dec 11
Frontier Logo
4:50 pm - 9:55 amDEN-SJU
14h 05m1 stop
Frontier Logo
11:05 am - 7:50 amSJU-DEN
23h 45m1 stop
$276Frontier
Find Deal
Sat, Feb 21 - Sat, Feb 28
Frontier Logo
12:59 am - 3:06 pmDEN-SJU
11h 07m1 stop
Frontier Logo
7:00 am - 12:52 pmSJU-DEN
8h 52m1 stop
$278Frontier
Find Deal
Fri, Feb 6 - Wed, Feb 18
Frontier Logo
8:41 pm - 5:54 pmDEN-SJU
19h 13m2 stops
Frontier Logo
7:30 am - 2:53 pmSJU-DEN
10h 23m1 stop
$280Frontier
Find Deal
Tue, Oct 28 - Sun, Nov 9
Multiple Airlines Logo
7:52 pm - 2:59 pmDEN-SJU
17h 07m1 stop
Multiple Airlines Logo
2:49 am - 1:12 pmSJU-DEN
12h 23m2 stops
$298Multiple Airlines
Find Deal
Sat, Oct 18 - Tue, Oct 21

Frontier flights from Denver to San Juan

Our best Frontier deals on Denver to San Juan flight tickets
Frontier
Sep 20
DEN6:55 pmDenver Intl
12h 57m
1 stop
SJU9:52 amSan Juan Luis Munoz Marin Intl
Sep 26
SJU12:28 amSan Juan Luis Munoz Marin Intl
10h 29m
1 stop
DEN8:57 amDenver Intl
$268
Find similar
Frontier
Nov 8
DEN12:59 amDenver Intl
11h 15m
1 stop
SJU3:14 pmSan Juan Luis Munoz Marin Intl
Nov 19
SJU9:00 amSan Juan Luis Munoz Marin Intl
12h 26m
1 stop
DEN6:26 pmDenver Intl
$269
Find similar
Frontier
Feb 9
DEN4:50 pmDenver Intl
14h 05m
1 stop
SJU9:55 amSan Juan Luis Munoz Marin Intl
Feb 20
SJU6:59 pmSan Juan Luis Munoz Marin Intl
17h 09m
1 stop
DEN9:08 amDenver Intl
$270
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Denver to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Thu 10/23

11:45 pm-10:57 am

1 stop9h 12m

San Juan Luis Munoz Marin Intl

Sun 10/26

9:06 pm-8:33 am

1 stop13h 27m

$268

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Sat 11/8

12:59 am-3:14 pm

1 stop11h 15m

San Juan Luis Munoz Marin Intl

Wed 11/19

9:00 am-6:26 pm

1 stop12h 26m

$269

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Mon 2/9

4:50 pm-9:55 am

1 stop14h 05m

San Juan Luis Munoz Marin Intl

Fri 2/20

6:59 pm-9:08 am

1 stop17h 09m

$270

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 11/18

12:16 am-11:19 am

1 stop8h 03m

San Juan Luis Munoz Marin Intl

Thu 11/27

6:01 am-12:29 pm

1 stop9h 28m

$272

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Fri 10/17

9:19 pm-6:58 pm

2 stops19h 39m

San Juan Luis Munoz Marin Intl

Fri 10/24

11:48 am-10:59 pm

2 stops13h 11m

$273

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 11/18

8:13 pm-3:46 pm

1 stop16h 33m

San Juan Luis Munoz Marin Intl

Thu 12/11

11:02 am-4:48 pm

1 stop8h 46m

$275

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Sat 2/21

4:50 pm-9:55 am

1 stop14h 05m

San Juan Luis Munoz Marin Intl

Sat 2/28

11:05 am-7:50 am

1 stop23h 45m

$276

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Fri 2/6

12:59 am-3:06 pm

1 stop11h 07m

San Juan Luis Munoz Marin Intl

Wed 2/18

7:00 am-12:52 pm

1 stop8h 52m

$278

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Tue 10/28

8:41 pm-5:54 pm

2 stops19h 13m

San Juan Luis Munoz Marin Intl

Sun 11/9

7:30 am-2:53 pm

1 stop10h 23m

$280

DenverSan Juan

DEN - SJU

DENSJU

Denver Intl

Sat 10/18

7:52 pm-2:59 pm

1 stop17h 07m

San Juan Luis Munoz Marin Intl

Tue 10/21

2:49 am-1:12 pm

2 stops12h 23m

$298

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to San Juan from

How to get the cheapest flight ticket from Denver to San Juan

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Juan?

If you’re not able to fly to San Juan in August, then October is your next best option. Flight prices from Denver to San Juan during October average around $348.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart from Denver to San Juan is on a Thursday when prices can be found for as low as $631. The most expensive day to fly to San Juan is Saturday, with ticket prices averaging around $802.

What is the cheapest time of day to depart on your flight to San Juan?

The cheapest time of day to fly to San Juan is in the afternoon when flights can be purchased for as low as $288. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $688 on average. Flights to San Juan from Denver in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Denver Intl to San Juan flight route?

Fly from Denver Intl to San Juan Luis Munoz Marin Intl for the best Denver Intl - San Juan flight prices

How far in advance should I book a flight to San Juan?

You are more likely to see cheaper flights to San Juan from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan for around $470 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Denver for as low as $350 on momondo.

What cabin class options are available on Denver Intl to San Juan flights?

There are 4 cabin classes available to choose from on Denver Intl to San Juan flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Cheap Denver to San Juan flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to San Juan

Fastest flight time

5h 39m

Direct flights

Every day

Airports in San Juan

1 airport
The fastest flight from Denver to San Juan takes 5h 39m
Direct flights go from Denver to San Juan every day.
There is 1 airport near San Juan: San Juan Luis Munoz Marin Intl (SJU)
Search flight deals

  • How far is Denver Intl to San Juan by plane?

    A flight from Denver Intl to San Juan will travel around 2735.5 mi. By plane, this route typically takes 7h 06m.

  • When did momondo last update prices for flights from Denver Intl Airport to San Juan?

    Prices for flights from Denver Intl Airport to San Juan are refreshed on a daily basis.

  • How many operators does momondo search for flights from Denver Intl Airport to San Juan?

  • How old do you have to be to fly from Denver Intl Airport to San Juan?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to San Juan.

  • What documentation or ID do you need to fly to San Juan?

    The required travel and health documents for your San Juan trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Juan. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Denver to San Juan

Compare and see reviews for airlines that fly from Denver to San Juan with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $143Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
JetBluePriceFrom $327Free CancellationRating
7.2
2,914 reviews
Search JetBlue flights
DeltaPriceFrom $381Free CancellationRating
7.9
7,961 reviews
Search Delta flights
SouthwestPriceFrom $445Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $486Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
American AirlinesPriceFrom $494Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Denver to San Juan?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Denver to San Juan. momondo saves you time and could save you money on your trip.

Can I find flights from Denver to San Juan with flexible booking policies on momondo?

momondo does allow users to show only those flights to San Juan from Denver which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Denver to San Juan?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Juan from Denver.

I’m not ready to book a flight from Denver to San Juan right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to San Juan from Denver. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Juan trip

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Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

Airports listed have a maximum distance of 7.1 mi from San Juan
San Juan Isla Grande Airport
San Juan Luis Munoz Marin Intl Airport