Cheap Flights from St. Augustine (UST) to San Juan (SJU)

Popular airlines from St. Augustine, FL (UST-Northeast Florida Regional) to Luis Munoz Marin Intl. Airport (SJU)

Frequently asked questions

How much does a flight from Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU) cost?
Get a cheap one-way flight or cheap return flight from Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU)?
Planning your trip for can help you save, as it's the cheapest month for flights between UST and SJU. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest UST to SJU flight.
How many flights per day from Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU)?
Direct flights from Northeast Florida Regional Airport (UST) 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 Expedia's filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from UST to SJU?
Typically you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU)?
To avoid possible delays on the Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU) route, travel before 3 PM. Departures after this hour have a 22% higher chance of being canceled.**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 Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU) last-minute?
Booking your ticket from UST to SJU just before your trip is generally more expensive. However, if there's some wiggle room with your travel times and dates, you could snag a cheap last-minute fare.
Can I cancel or change the date of my flight from Northeast Florida Regional Airport (UST) to Luis Munoz Marin Intl. Airport (SJU)?
It's usually possible to reschedule or cancel your UST to SJU flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Northeast Florida Regional
Destination airport
Luis Munoz Marin Intl.
Distance
1250 mi

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St. Augustine to San Juan Flights

The cheapest times to fly from St. Augustine 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 St. Augustine to San Juan are during the month of . You can find some of the cheapest flights from St. Augustine to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Augustine to San Juan

Sunday is one of the best days to book for cheap flights from St. Augustine 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 St. Augustine 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 St. Augustine to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 St. Augustine 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 St. Augustine 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.

 

St. Augustine to San Juan Flights

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*Available to One Key members.