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240 € Cheap Flights from Denver International to San Juan

Compare Denver International to San Juan flight deals

Find the cheapest month or even day of the year to fly to San Juan

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Flight deals from Denver International to San Juan

Looking for a cheap last-minute deal or the best return flight from Denver International Airport to San Juan? If you want to travel next month, return fares start from 280 €. Find the lowest prices on one-way and return tickets right here.
San Juan.240 € per passenger.Departing Wed, 9 Sep, returning Mon, 14 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 9 Sep, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Mon, 14 Sep, arriving in Denver International.Price includes taxes and charges.From 240 €, select.
San Juan.244 € per passenger.Departing Fri, 28 Aug, returning Tue, 1 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Fri, 28 Aug, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Tue, 1 Sep, arriving in Denver International.Price includes taxes and charges.From 244 €, select.
San Juan.246 € per passenger.Departing Tue, 20 Oct, returning Wed, 28 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Tue, 20 Oct, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Wed, 28 Oct, arriving in Denver International.Price includes taxes and charges.From 246 €, select.
San Juan.248 € per passenger.Departing Sat, 19 Sep, returning Tue, 6 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Sat, 19 Sep, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Tue, 6 Oct, arriving in Denver International.Price includes taxes and charges.From 248 €, select.
San Juan.271 € per passenger.Departing Thu, 29 Oct, returning Wed, 4 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Thu, 29 Oct, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Wed, 4 Nov, arriving in Denver International.Price includes taxes and charges.From 271 €, select.
San Juan.275 € per passenger.Departing Tue, 10 Nov, returning Tue, 17 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Tue, 10 Nov, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Tue, 17 Nov, arriving in Denver International.Price includes taxes and charges.From 275 €, select.
San Juan.280 € per passenger.Departing Wed, 19 Aug, returning Sun, 30 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Wed, 19 Aug, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Sun, 30 Aug, arriving in Denver International.Price includes taxes and charges.From 280 €, select.
San Juan.329 € per passenger.Departing Wed, 3 Feb, returning Mon, 8 Feb.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Denver International on Wed, 3 Feb, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Southwest Airlines, departs from San Juan Luis Munoz Marin on Mon, 8 Feb, arriving in Denver International.Price includes taxes and charges.From 329 €, select.
San Juan.339 € per passenger.Departing Wed, 20 Jan, returning Wed, 27 Jan.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Denver International on Wed, 20 Jan, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Southwest Airlines, departs from San Juan Luis Munoz Marin on Wed, 27 Jan, arriving in Denver International.Price includes taxes and charges.From 339 €, select.
San Juan.362 € per passenger.Departing Wed, 9 Dec, returning Mon, 14 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Denver International on Wed, 9 Dec, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Southwest Airlines, departs from San Juan Luis Munoz Marin on Mon, 14 Dec, arriving in Denver International.Price includes taxes and charges.From 362 €, select.
San Juan.394 € per passenger.Departing Mon, 1 Mar, returning Sun, 7 Mar.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Denver International on Mon, 1 Mar, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Southwest Airlines, departs from San Juan Luis Munoz Marin on Sun, 7 Mar, arriving in Denver International.Price includes taxes and charges.From 394 €, select.
San Juan.425 € per passenger.Departing Fri, 31 Jul, returning Wed, 5 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Fri, 31 Jul, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Wed, 5 Aug, arriving in Denver International.Price includes taxes and charges.From 425 €, select.
San Juan.431 € per passenger.Departing Thu, 28 Jan, returning Sat, 6 Feb.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Denver International on Thu, 28 Jan, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Southwest Airlines, departs from San Juan Luis Munoz Marin on Sat, 6 Feb, arriving in Denver International.Price includes taxes and charges.From 431 €, select.
San Juan.435 € per passenger.Departing Sun, 29 Nov, returning Tue, 8 Dec.Return flight with Southwest Airlines.Outbound indirect flight with Southwest Airlines, departs from Denver International on Sun, 29 Nov, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Southwest Airlines, departs from San Juan Luis Munoz Marin on Tue, 8 Dec, arriving in Denver International.Price includes taxes and charges.From 435 €, select.
San Juan.448 € per passenger.Departing Tue, 28 Jul, returning Fri, 31 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Denver International on Tue, 28 Jul, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Fri, 31 Jul, arriving in Denver International.Price includes taxes and charges.From 448 €, select.
San Juan.506 € per passenger.Departing Thu, 29 Oct, returning Wed, 4 Nov.Return flight with United.Outbound direct flight with United departs from Denver International on Thu, 29 Oct, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Wed, 4 Nov, arriving in Denver International.Price includes taxes and charges.From 506 €, select.

Find the cheapest month to fly from Denver International to San Juan

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver International to San Juan flights are currently cheapest in September.
Jul
from 448 €
Aug
from 280 €
Sep
from 240 €
Oct
from 246 €
Nov
from 275 €
Dec
from 362 €
Jan
from 339 €
Feb
from 329 €
Mar
from 394 €
Apr
from 516 €
May
from 911 €
Jun
from 520 €

Direct flights from Denver International to San Juan

Alternative Denver International to San Juan routes

Looking for the cheapest, fastest or easiest route from Denver International to San Juan? You could fly into the following airports instead.

San Juan Isla Grande

1km from central San Juan
Closest
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San Juan Luis Munoz Marin

11km from central San Juan
Cheapest
from 240 €
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Roosevelt Roads

55km from central San Juan
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Ponce

70km from central San Juan
from 349 €
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Vieques

82km from central San Juan
from 465 €
Search flights

Culebra

85km from central San Juan
from 430 €
Search flights

Denver to San Juan: Flight information

The things to know before you go.
Cheapest flight found240 €
Cheapest month to flySeptember
Average flight time5 hrs, 43 mins
Most popular airlineUnited
Average flights per week9

Finding cheap flights from Denver International to San Juan: Frequently asked questions

There are 6 airports in San Juan: San Juan Isla Grande, San Juan Luis Munoz Marin, Roosevelt Roads, Ponce, Vieques, and Culebra.
The best price we found for a return flight from Denver International to San Juan is 240 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
5 hours and 43 minutes is the average flight time from Denver International to San Juan.
United flies direct from Denver International to San Juan.
As of July 2026, there are 9 flights per week flying from Denver International to San Juan.
The cheapest month to fly from Denver International to San Juan is usually September.
If you're flying from Denver International Airport, the cheapest airport near San Juan is San Juan Luis Munoz Marin – which is 11.3 km away from the centre of San Juan. We've found flights into this airport from 240 €.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to San Juan on Wednesday, 9 September 2026.
Yes – the average flight time is 5 hours and 43 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Juan but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Juan is around 40 days in advance, so don’t leave your flight to the last minute.

In July, the average temperature is usually around 27°C. August is typically the warmest month in San Juan, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging 23°C. The rainiest month is September.
Currently, Frontier Airlines and United offer the cheapest flight tickets to San Juan.

Travelling from Denver International Airport (DEN) to San Juan: what you need to know

  • Book a direct flight from Denver International Airport to San Juan and you'll be in the air for an average of 6 hours 35 minutes.

  • San Juan is three hours ahead of Denver, where Denver International Airport is located. San Juan runs on the UTC-4 timezone.

  • With six weekly departures between the two airports, Denver International Airport (DEN) to Luis Munoz Marin International Airport (SJU) is the most popular route. Board United Airlines's 09:40 flight to get your trip from DEN to SJU underway.

  • Allow plenty of time to make your DEN to San Juan flight. As a general rule, turn up at least two hours before international departures and an hour ahead for domestic flights.

  • Flying during a peak month such as July? School holidays and other popular seasons can lead to longer queues at security. Play it safe and get there up to four hours before an international flight and two hours before domestic departures.

  • You can book a direct Denver International Airport to San Juan ticket. Start your trip at DEN and end it at Luis Munoz Marin International Airport (SJU).

  • Keep your eyes peeled for promotions from United Airlines. This carrier has direct flights from Denver International Airport to San Juan.

  • Consider adding a stopover to potentially unlock a cheaper plane ticket from DEN to San Juan. Simply uncheck 'Direct flights only' during your search. Give yourself a breather (and maybe even a better deal) by stopping at one of these popular options:

    • Atlanta Hartsfield-Jackson International Airport (ATL)

    • Orlando International Airport (MCO)

    • Southwest Florida International Airport (RSW)

  • Located around 31 kilometres from the centre of Denver, DEN can be reached in about 35 minutes by car, depending on traffic. The journey on public transport takes roughly 35 minutes.

  • Booking a night at a hotel can take the stress out of getting to the airport on time. If you're looking for somewhere to stay before your flight from Denver International Airport to San Juan, check out The Westin Denver International Airport. It's a short ride from DEN.

  • Denver International Airport maintains a strong on-time record, reducing your chances of a delayed flight. Departures from DEN make it to their destination as scheduled 80% of the time.

  • The address for DEN is 8500 Pena Boulevard.

How to find the cheapest flights from Denver International Airport (DEN) to San Juan

  • 119 € is currently the lowest price for a one-way Denver International Airport to San Juan flight. Return plane tickets start from 240 €. These fares may change depending on availability.

  • To find cheap flights from DEN to San Juan, book ahead. Airlines tend to offer their most competitively priced fares when tickets are first released.

  • If you're flexible with your travel plans, try using the 'Whole month' tool. It'll find the lowest price across every month when looking for a Denver International Airport to San Juan ticket.

  • Snapping up a cheap flight from DEN to San Juan couldn't be easier with Price Alerts. Simply create one of these automatic notifications and we'll get in touch as soon as a deal gets even better.

  • Pick your ideal arrival and departure times, airlines and number of stops with our filters. Then, sort the results for your flight from Denver International Airport to San Juan by 'Cheapest,' 'Fastest' or 'Best.'

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

  • Luis Munoz Marin International Airport (SJU) is around 11 kilometres from central San Juan. If you're catching a taxi or a ride-share, the drive takes roughly 20 minutes.

  • When travelling by public transport, expect a journey time of about 1 hour.

  • The last thing you need is a long journey to your hotel if you're getting in late on a flight from Denver International Airport to San Juan. Book one of these accommodation options near SJU instead:

  • Lock in the lowest price by reserving your vehicle from Luis Munoz Marin International Airport about two weeks ahead of your flight from DEN to San Juan.

Best time to go to San Juan

  • March is the busiest month for flights from Denver International Airport to San Juan. To escape the crowds, head to San Juan in December.

  • Lock in a Denver International Airport to San Juan plane ticket with a departure in August if you're eager to visit the city during its warmest month. You can expect temperatures to range from 24ºC (75ºF) to 32ºC (90ºF).

  • If you want cooler conditions, search for a cheap ticket from DEN to San Juan in February when temperatures average between 21ºC (70ºF) and 28ºC (82ºF).

More about San Juan

  • Once you've booked your flight from Denver International Airport to San Juan, choose a hotel that puts you where you want to be. Make one of these accommodation options your base for exploring San Juan:

  • Every great journey has to include a little sightseeing. Esperanza Beach, Balneario El Escambron and Escambron Green are essential stops on your San Juan itinerary.

Explore more of Puerto Rico

  • Aguadilla is just one of the many places in Puerto Rico waiting to be explored after you've seen San Juan. Around 113 kilometres away to the west, its top attractions include Silla Aguadilla, Bridges Surf Beach and Playa Rompe Olas.

  • If you're interested in discovering another side of Puerto Rico, consider Isabela, roughly 105 kilometres west of San Juan. Playa montones, Shore Island Beach and Guajataca Forest Reserve are among the biggest draws.

Plan the rest of your trip from Denver to San Juan

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.