$95 Cheap Flights from San Antonio (SAT) to Islip (ISP)

View $95 flight on Fri, Oct 24, 2025Opens in a new window

Popular airlines from San Antonio International Airport (SAT) to MacArthur Airport (ISP)

Cheap Flights from San Antonio to Islip (SAT-ISP)

Prices were available within the past 7 days and start at $95 for one-way flights and $178 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Nov 15 - Wed, Nov 19
SAT
San Antonio
ISP
Islip
$178 Roundtrip, found 1 day ago
$178
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Nov 15 from San Antonio to Islip, returning Wed, Nov 19, priced at $178 found 1 day ago
Frontier Airlines
Fri, Oct 17 - Fri, Nov 7
SAT
San Antonio
ISP
Islip
$195 Roundtrip, found 1 day ago
$195
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 17 from San Antonio to Islip, returning Fri, Nov 7, priced at $195 found 1 day ago
Frontier Airlines
Sat, Nov 1 - Wed, Nov 19
SAT
San Antonio
ISP
Islip
$251 Roundtrip, found 1 day ago
$251
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Nov 1 from San Antonio to Islip, returning Wed, Nov 19, priced at $251 found 1 day ago
Frontier Airlines
Sat, Nov 1 - Fri, Nov 7
SAT
San Antonio
ISP
Islip
$268 Roundtrip, found 1 day ago
$268
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Nov 1 from San Antonio to Islip, returning Fri, Nov 7, priced at $268 found 1 day ago
Frontier Airlines
Sat, Nov 15 - Wed, Dec 3
SAT
San Antonio
ISP
Islip
$272 Roundtrip, found 1 day ago
$272
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Nov 15 from San Antonio to Islip, returning Wed, Dec 3, priced at $272 found 1 day ago
Frontier Airlines
Fri, Oct 10 - Sun, Oct 12
SAT
San Antonio
ISP
Islip
$276 Roundtrip, found 4 days ago
$276
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Fri, Oct 10 from San Antonio to Islip, returning Sun, Oct 12, priced at $276 found 4 days ago
Frontier Airlines
Sat, Nov 15 - Fri, Dec 5
SAT
San Antonio
ISP
Islip
$283 Roundtrip, found 1 day ago
$283
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Nov 15 from San Antonio to Islip, returning Fri, Dec 5, priced at $283 found 1 day ago
Southwest Airlines
Tue, Oct 21 - Wed, Oct 22
SAT
San Antonio
ISP
Islip
$287 Roundtrip, found 5 days ago
$287
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Oct 21 from San Antonio to Islip, returning Wed, Oct 22, priced at $287 found 5 days ago
Frontier Airlines
Sat, Nov 1 - Wed, Nov 19
SAT
San Antonio
ISP
Islip
$291 Roundtrip, found 7 hours ago
$291
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Sat, Nov 1 from San Antonio to Islip, returning Wed, Nov 19, priced at $291 found 7 hours ago
Southwest Airlines
Tue, Oct 21 - Wed, Oct 22
SAT
San Antonio
ISP
Islip
$292 Roundtrip, found 5 days ago
$292
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Tue, Oct 21 from San Antonio to Islip, returning Wed, Oct 22, priced at $292 found 5 days ago

Frequently asked questions

How much does a flight from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP) cost?
Grab a cheap one-way flight from $95 or cheap return flight from $178 from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP)?
Planning your trip for November may help you find better deals, as it's the cheapest month for flights between SAT and ISP. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP)?
Use the filters on Expedia to compare airlines and find the cheapest carrier that'll take you from SAT to ISP. Then, sort your results by "Price (lowest to highest)" to snag the best deal available.
How many flights per day from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP)?
There aren't any daily direct flights available from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from SAT to ISP?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Keep in mind that flight schedules can change depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP)?
To avoid potential delays on the San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP) route, fly 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.
What airports do you fly into for Islip from San Antonio Intl. Airport (SAT)?
John F. Kennedy Intl. Airport (JFK) is the only airport in Islip with direct flights from San Antonio Intl. Airport (SAT). Check out the options and find cheap fares on Expedia.
Is it cheaper to buy a plane ticket from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP) last-minute?
Waiting until right before your break to book a flight from SAT to ISP often results in higher prices. While it's possible to find some last-minute discounts, they aren't always guaranteed. Be flexible with your travel plans for a better chance of landing a bargain.
Is it cheaper to book a SAT to ISP flight and hotel package?
You'll generally save money by booking a SAT to ISP flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've chosen your ideal flights and accommodations, consider adding extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from San Antonio Intl. Airport (SAT) to MacArthur Airport (ISP)?
If you reserved your SAT to ISP flight in 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, visit our Customer Service portal for more information.

Travel information

Travel information

Origin airport
San Antonio Intl.
Destination airport
MacArthur
Airlines serving
Frontier Airlines, Southwest Airlines
Roundtrip price
$178
Distance
1622 mi

Book with confidence

Book with confidence

San Antonio to Islip Flights

The cheapest times to fly from San Antonio to Islip

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 San Antonio to Islip are during the month of November. You can find some of the cheapest flights from San Antonio to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Antonio to Islip

Sunday is one of the best days to book for cheap flights from San Antonio to Islip: 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 San Antonio to Islip

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 San Antonio to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $95 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 San Antonio to Islip 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 San Antonio to Islip 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.

 

San Antonio to Islip Flights

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*Available to One Key members.