DEN - SJU

$145 Find Cheap Flights from Denver to San Juan

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to San Juan departing on 12/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to San Juan.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to San Juan.
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$285
Typical prices: $253-$624
Multiple Airlines
Sat 1/17Sat 1/24
DEN - SJU • 1 stop
Cheapest non-stop
$486
Typical prices: $748-$1,352
United Airlines
Sun 12/14Wed 12/24
DEN - SJU • Non-stop
Our travelers' advice
AI-generated summary based on content written by travel experts
Use the West Security Checkpoint at DEN for faster screening.
For quick city access from SJU, taxis or Uber are efficient.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $285 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
August
Cheapest • 31% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Juan!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Denver to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to San Juan

Sat, Jan 17 - Sat, Jan 24
Multiple Airlines Logo
12:05 am - 3:27 pmDEN-SJU
12h 22m1 stop
Multiple Airlines Logo
9:29 pm - 12:19 pmSJU-DEN
17h 50m2 stops
$285Multiple Airlines
Find Deal
Fri, Dec 12 - Fri, Dec 19
Multiple Airlines Logo
12:59 am - 12:32 pmDEN-SJU
32h 33m2 stops
Multiple Airlines Logo
3:55 am - 5:34 pmSJU-DEN
16h 39m1 stop
$286Multiple Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 16
Frontier Logo
11:00 pm - 3:01 pmDEN-SJU
13h 01m2 stops
Frontier Logo
3:55 am - 8:13 pmSJU-DEN
19h 18m1 stop
$287Frontier
Find Deal
Sat, Feb 7 - Sun, Feb 15
Frontier Logo
6:00 am - 5:00 pmDEN-SJU
8h 00m1 stop
Frontier Logo
2:29 am - 9:03 amSJU-DEN
9h 34m1 stop
$288Frontier
Find Deal
Thu, Nov 27 - Sat, Dec 20
Frontier Logo
11:15 pm - 11:27 amDEN-SJU
9h 12m1 stop
Frontier Logo
1:59 am - 10:59 pmSJU-DEN
24h 00m1 stop
$289Frontier
Find Deal
Wed, Jan 7 - Thu, Jan 8
Multiple Airlines Logo
10:45 am - 2:50 amDEN-SJU
13h 05m1 stop
Multiple Airlines Logo
2:59 am - 7:02 pmSJU-DEN
19h 03m1 stop
$290Multiple Airlines
Find Deal
Wed, Dec 31 - Thu, Jan 8
Multiple Airlines Logo
8:59 am - 1:24 amDEN-SJU
13h 25m1 stop
Multiple Airlines Logo
11:52 am - 10:00 pmSJU-DEN
13h 08m2 stops
$291Multiple Airlines
Find Deal
Sat, Dec 13 - Tue, Dec 16
Frontier Logo
11:25 pm - 11:50 pmDEN-SJU
21h 25m1 stop
Frontier Logo
3:55 am - 11:04 pmSJU-DEN
22h 09m1 stop
$292Frontier
Find Deal
Tue, Dec 30 - Sun, Jan 11
Multiple Airlines Logo
12:14 am - 7:13 pmDEN-SJU
15h 59m2 stops
Multiple Airlines Logo
7:01 pm - 7:15 amSJU-DEN
15h 14m1 stop
$293Multiple Airlines
Find Deal
Sun, Dec 14 - Wed, Dec 24
Multiple Airlines Logo
7:00 am - 11:25 pmDEN-SJU
13h 25m1 stop
Multiple Airlines Logo
7:06 pm - 8:38 amSJU-DEN
16h 32m1 stop
$294Multiple Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Denver to San Juan flights

Get data-powered insights and trends into flights from Denver to San Juan to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Denver to San Juan Luis Munoz Marin Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Denver to San Juan Luis Munoz Marin Intl Airport departing in January.

What’s the cheapest day of the week to fly from Denver to San Juan?

The average price of all round-trip flights from Denver to San Juan Luis Munoz Marin Intl Airport clicked on KAYAK for each day over the last 12 months.

For Denver to San Juan, Tuesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from San Juan back to Denver, the best deals are generally found on Thursday, with Sunday being the most expensive.

What is the cheapest month to fly from Denver to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Denver to San Juan Luis Munoz Marin Intl Airport is August, where tickets cost $338 (return) on average. On the other hand, the most expensive months are December and October, where the average cost of round-trip tickets is $701 and $575 respectively.

How far in advance should I book a flight from Denver to San Juan Luis Munoz Marin Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Denver to San Juan Luis Munoz Marin Intl Airport, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 1 week before departure.

Expert advice

Expert advice for your flight from Denver to San Juan

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
DEN

Use the West Security Checkpoint at DEN for faster screening, allowing liquids and laptops to stay in bags.

SJU

For quick city access from SJU, taxis or Uber are efficient options, taking about 25 minutes to Old San Juan.

Our travel experts
Harriet Baskas

Harriet Baskas

Expert on DEN

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on SJU

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more

Good to know

Low seasonSeptember
Cheapest flight$145
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 9% increase in price.
Flight from Denver to San Juan

When to book flights from Denver to San Juan

Are your dates flexible? Find out the best times to travel from Denver to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Denver to San Juan flights

  • What is the cheapest flight from Denver to San Juan Luis Munoz Marin Intl Airport?

    In the last 3 days, the lowest price for a flight from Denver to San Juan Luis Munoz Marin Intl Airport was $145 for a one-way ticket and $285 for a round-trip.

  • Do I need a passport to fly between Denver and San Juan?

    Yes

  • Which airports will I be using when flying from Denver to San Juan?

    Denver airport is called Denver Intl and the only airport in San Juan is San Juan Luis Munoz Marin Intl.

  • Which aircraft models fly most regularly from Denver to San Juan?

    The Boeing 737 MAX 9 is the aircraft model that flies most regularly on the Denver to San Juan flight route.

  • Which airline alliances offer flights from Denver to San Juan?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Denver and San Juan, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Denver to San Juan?

    There are nonstop flights from Denver to San Juan on a daily basis.

  • Which is the best airline for flights from Denver to San Juan, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Denver to San Juan are Southwest and Delta. With an average price for the route of $580 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $646 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Denver to San Juan?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to San Juan?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to San Juan?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Denver with another airline. Booking your flights between Denver and SJU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to San Juan?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Denver to San Juan Luis Munoz Marin Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $368 or less one-way and $636 or less round-trip.

Prefer to fly direct from Denver to San Juan?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Denver Intl to San Juan Luis Munoz Marin Intl.
Find which airlines fly direct from Denver Intl Airport to San Juan Luis Munoz Marin Intl Airport, which days they fly and book direct flights.

Direct departures

Denver Intl to San Juan Luis Munoz Marin Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

San Juan Luis Munoz Marin Intl to Denver Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 5 airlines serving from Denver to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Denver to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to San Juan? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4235 reviews
7.5Entertainment
8.6Crew
7.0Food
8.1Boarding
8.0Comfort
Airline reviews

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

2.0 MediocreCharity, Nov 2025MSP - MDW
Read more Southwest reviews

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Plenty of leg room, temperature was great and staff was excellent. Would do it more often.

The ticket agents in West Palm Beach on Friday afternoon Nov. 7th were incredible in getting us on an earlier plane to Atlanta during the government shutdown. Had the taken our original flight we would have missed our connection. She did this on her own, We didn't even have to ask, and she did it all with a smile and showing genuine concern that we would be taken care of. We are very grateful and thankful. We fly often, and now we will be sure to fly Delta.

Flight delayed then cancelled. Misplaced luggage. Still do not have. Rented car 1100 mile drive. I had to buy some overnight Hotels clothes toiletries gas food at my expense. Still not home. Not sure where luggage is. Over 4 hours on hold to Felta

I truly love flying with Delta. They have always treated me with the upmost respect

Our flight attendant in FIRST CLASS was one of the worst I’ve ever had. She was not at all pleasant, nor particularly good at her service.

Everything went well and was good. Nothing exceptional, but no complaints either. Cheap seats are pretty comfortable.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

Great smooth flight. Had a seating change, but that was an improvement. Thanks United Airways Crew.

Flight was good but there are way to many announcements for credit cards etc.

Crew seemed a bit cranky. No seatback screens. But boarding was efficient and on time and we arrived early.

See previous note about the passenger in Denver who threw my husband's bag out of the overhead bin in order to maker room for his own. And the flight attendant back up the new passenger.

Terrible. They wouldn't allow me on my flight on the 14th..

Impressed with the service despite turbulence because of the weather. Both flights arrived before their scheduled times.

Great experience…left a bit behind schedule but made up fir that in the air and landed 10 minutes early 😁

The seat and leg room was not good. The food and beverage service was good.

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Electric plugs didn't work. Entertainment system wasn't working

we landed at cmh ten minutes early but had to sit on tarmac for twenty minutes because a plane was at our gate despite the fact that 3 other gates were open.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

I have a gluten allergy so did have any food

I have a gluten allergy so didn't have any food

Loved the crew . Absolutely no complaints. Except for luggage lost

Everything was good The connects, with no blame to crew. Or pilots. I understand they are short staffed. Everything went well for me. I'll be using you guys again in May if not sooner.

this plane was really old, had exit row seats and tray was in arm of seat so super uncomfortable to use. another seat they could t even use the tray it was broke. seat i. front of me had duct tape on it cause seat was ripped open... this plane should either be updated or retired.

We were very rushed by a staff member at the gate when transferring from American Airlines to Fijian. Then the plane stayed put for ages anyhow! The plane was delayed and my bag sent to San Francisco instead of Fiji

Baggage handling poor. Second time this has happened. My bag went to San Francisco instead of Fiji. No apology. Luckily Nadi airport staff are fantastic. My bag arrived in Fiji the next day.

We loved the steward on the plane. He made the night enjoyable

Frontier is the Walmart of airlines. Frontier has removed adjustability and comfort from their seats to make the flight lighter and save gas. This makes it impossible to sleep on their flights. Their customer service is abysmal. Once, I bought a drink on the plane, and they swiped my credit card on the plane to pay for it. Then I got three weeks of daily notices from my bank telling me they tried to charge the wrong card number over and over again. I tried to call them, but they removed the ability to actually talk to someone that can resolve such a problem from their company to cut corners. The only way to talk to someone in person is to go to the check-in counter at the airport (40 minutes drive from my house). Eventually their system gave up on trying to charge the card, after 21 days of repeated tries. They don't pad their prices even a little to handle customer service issues like missed flights. They also have a blanket policy preventing helping you reschedule a missed flight if their system says you "cancelled" your own flight online. This is a major problem because their website is broken on mobile devices, the only web browser you have at the airport when their gate staff tell you that you have to reschedule your own missed flight online because they can't help you. I tried to reschedule my flight on my android device and instead, their website crashed and "cancelled" my missed flight. When I got to the counter, the agent argued with me for 5 minutes insisting that I intentionally cancelled my own flight (implying I had to buy another flight). She missed the point: the problem was that I could not buy another flight because their website is broken. I left to avoid more conflict with the "customer service" agent. I tried to redress my issue with their only other "customer service" chanel available: the contact form on their website. The response I got was more of the same: you cancelled your own flight, according to our website / computer records, therefore we won't help you. I was trying to explain the problem with their broken website that cost me hundreds of dollars by crashing / malfunctioning and resulting in a cancelled flight, but they only had deaf ears for this problem. Worst customer service I have ever experienced. I will never buy another Frontier flight again, because it is a risky, painful move that I will likely regret often.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

The worst. They don’t follow procedure for boarding per group. Flight got delayed for no understandably reasons, they changed our destination from PR to Miami, left us inside a plane for more than 8 hours, then cancelled flight in Miami leaving us stranded. Poorly managed re-accommodation for a new flight and overnight stay so I have to spend in a new ticket and my own hotel room to been able to get to my office next day. Lost 2 days of work and as a doctor, patients loosing their appointments. to other flights and besides

I’m not gonna fly Frontier Airlines because booking is not an option. No water or food is for high price, not equipped for health emergency incompetent crew for emergency services. Cheap airline shows it is cheaper in all service categories. Boarding is the best of all airlines!

Very bad! No good service delayed my second connection flight

Frontier is terrible. Paid for exit row, not given exit row, refused to refund fee.

2 hour delay due to late plane, wrong size plane causing overbooking, and people getting off and on the plane after boarding was completed.

The worst. We never made our connection and they did absolutely nothing to help us at the airport.

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

The Boarding process in Denver was chaotic, and since the line was so long, we were lined up very far from the gate. If there were any announcements from the gate staff, we didn't hear them. The flight attendants were spectacular. The only negative part of the flight was sitting by a 2 1/2 year old who was unruly and unfortunately had parents that matched his behaviors. Also, the restaurants in Denver on the E concourse, they didn't have food (passengers could only order 1 item on the entire menu) or the restaurants had 12-14 people waiting for orders to be prepared and another 6 people waiting to order. If you have a layover in Denver and need to grab food, be prepared to visit the shops with pre-packaged sandwiches, or you can visit another concourse but it may take a while to transit throughout the airport.

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

Information on your arrival and departure airports