$109 Cheap Flights from Austin (AUS) to San Juan (SJU)

View $109 flight on Sun, Jul 20, 2025Opens in a new window

Popular airlines from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU)

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Cheap Flights from Austin to San Juan (AUS-SJU)

Prices were available within the past 7 days and start at $109 for one-way flights and $192 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sun, Sep 21 - Thu, Oct 2
AUS
Austin
SJU
San Juan
$192 Roundtrip, found 3 days ago
$192
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sun, Sep 21 from Austin to San Juan, returning Thu, Oct 2, priced at $192 found 3 days ago
Frontier Airlines
Sun, Sep 21 - Thu, Oct 9
AUS
Austin
SJU
San Juan
$194 Roundtrip, found 5 days ago
$194
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Sep 21 from Austin to San Juan, returning Thu, Oct 9, priced at $194 found 5 days ago
Frontier Airlines
Sun, Sep 28 - Thu, Oct 9
AUS
Austin
SJU
San Juan
$200 Roundtrip, found 2 days ago
$200
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sun, Sep 28 from Austin to San Juan, returning Thu, Oct 9, priced at $200 found 2 days ago
Frontier Airlines
Thu, Sep 25 - Thu, Oct 9
AUS
Austin
SJU
San Juan
$222 Roundtrip, found 4 days ago
$222
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Sep 25 from Austin to San Juan, returning Thu, Oct 9, priced at $222 found 4 days ago
Frontier Airlines
Sun, Sep 7 - Thu, Sep 18
AUS
Austin
SJU
San Juan
$229 Roundtrip, found 5 days ago
$229
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Sep 7 from Austin to San Juan, returning Thu, Sep 18, priced at $229 found 5 days ago
Spirit Airlines
Sun, Aug 31 - Thu, Sep 4
AUS
Austin
SJU
San Juan
$237 Roundtrip, found 7 hours ago
$237
Roundtrip
found 7 hours ago
Select Spirit Airlines flight, departing Sun, Aug 31 from Austin to San Juan, returning Thu, Sep 4, priced at $237 found 7 hours ago
Spirit Airlines
Sun, Jul 20 - Wed, Jul 30
AUS
Austin
SJU
San Juan
$241 Roundtrip, found 7 hours ago
$241
Roundtrip
found 7 hours ago
Select Spirit Airlines flight, departing Sun, Jul 20 from Austin to San Juan, returning Wed, Jul 30, priced at $241 found 7 hours ago
Southwest Airlines
Tue, Sep 23 - Thu, Sep 25
AUS
Austin
SJU
San Juan
$251 Roundtrip, just found
$251
Roundtrip
just found
Select Southwest Airlines flight, departing Tue, Sep 23 from Austin to San Juan, returning Thu, Sep 25, priced at $251 just found
United
Wed, Sep 24 - Thu, Sep 25
AUS
Austin
SJU
San Juan
$260 Roundtrip, found 3 hours ago
$260
Roundtrip
found 3 hours ago
Select United flight, departing Wed, Sep 24 from Austin to San Juan, returning Thu, Sep 25, priced at $260 found 3 hours ago
American Airlines
Mon, Oct 13 - Mon, Oct 20
AUS
Austin
SJU
San Juan
$265 Roundtrip, found 1 hour ago
$265
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Mon, Oct 13 from Austin to San Juan, returning Mon, Oct 20, priced at $265 found 1 hour ago

Find the cheapest month to fly from Austin (AUS) to San Juan (SJU)

March is typically the cheapest month to fly

From $169 - $609 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $294
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $294
Flights from Austin (AUS) to San Juan (SJU)
Origin airport
Austin-Bergstrom Intl.
Destination airport
Luis Munoz Marin Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, JetBlue Airways, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$192
Distance
2143 mi
Average flight time
3 hours 40 mins

Austin to San Juan Flights

The cheapest times to fly from Austin to San Juan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Austin to San Juan are during the month of September. You can find some of the cheapest flights from Austin to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Austin to San Juan

Sunday is one of the best days to book for cheap flights from Austin to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Austin to San Juan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Austin to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from $109 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Austin to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Austin to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU) cost?
Cheap round-trip fares from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU) start from $866. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving AUS on July 5 2025 and touching down at SJU. The price was last updated on July 1 2025 and has not changed since.
What is the cheapest month to fly from AUS to SJU?
To lock in a cheap ticket, search for nonstop flights from AUS to SJU departing in November. You can find a one-way Southwest Airlines flight for $178 leaving on November 8 2025. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on July 1 2025 and remains unchanged.
What is the cheapest airline that flies from AUS to SJU?
Take off from AUS to SJU with Southwest Airlines. This carrier currently has the lowest one-way fare for this route, starting from $253. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from AUS on July 26 2025. Prices were last updated on July 1 2025 and have not changed since.
How many flights per day from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU)?
Direct flights from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from AUS to SJU?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What airline has the least delays from AUS to SJU?
Consider traveling with Southwest Airlines if you'd like to fly straight from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU) without any holdups. This airline has the strongest track record for punctuality, with an on-time score of 100%. Want real-time updates? You can check your flight status using the Expedia App.
What is the best time to fly from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU)?
To arrive at Luis Munoz Marin Intl. Airport (SJU) on time, select a flight that leaves from Austin-Bergstrom Intl. Airport (AUS) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Last-minute bookings from AUS to SJU are generally more expensive. For the best rates, start looking for flights well in advance. That said, if you're flexible with your travel dates, it's possible to score a cheap ticket right before your trip.
Can I cancel or change the date of my flight from Austin-Bergstrom Intl. Airport (AUS) to Luis Munoz Marin Intl. Airport (SJU)?
If you reserved your AUS to SJU flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you'd like more information.

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*Available to One Key members.