$101 Cheap Flights from San Antonio (SAT) to Islip (ISP)

View $101 flight on Sat, Apr 18, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $101 for one-way flights and $200 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Apr 18 - Thu, May 7
SAT
San Antonio
ISP
Islip
$200 Roundtrip, found 2 days ago
$200
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Apr 18 from San Antonio to Islip, returning Thu, May 7, priced at $200 found 2 days ago
Frontier Airlines
Sun, Mar 29 - Thu, Apr 16
SAT
San Antonio
ISP
Islip
$270 Roundtrip, found 2 days ago
$270
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sun, Mar 29 from San Antonio to Islip, returning Thu, Apr 16, priced at $270 found 2 days ago
Frontier Airlines
Tue, Mar 31 - Sun, Apr 19
SAT
San Antonio
ISP
Islip
$335 Roundtrip, found 2 days ago
$335
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Tue, Mar 31 from San Antonio to Islip, returning Sun, Apr 19, priced at $335 found 2 days ago
Frontier Airlines
Sun, Mar 29 - Sun, Apr 19
SAT
San Antonio
ISP
Islip
$340 Roundtrip, found 5 days ago
$340
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Mar 29 from San Antonio to Islip, returning Sun, Apr 19, priced at $340 found 5 days ago
Southwest Airlines
Mon, Jul 13 - Tue, Jul 14
SAT
San Antonio
ISP
Islip
$437 Roundtrip, found 1 day ago
$437
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Jul 13 from San Antonio to Islip, returning Tue, Jul 14, priced at $437 found 1 day ago
Southwest Airlines
Thu, Jul 16 - Tue, Jul 21
SAT
San Antonio
ISP
Islip
$442 Roundtrip, found 4 days ago
$442
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Thu, Jul 16 from San Antonio to Islip, returning Tue, Jul 21, priced at $442 found 4 days ago
Southwest Airlines
Mon, Jul 13 - Tue, Jul 14
SAT
San Antonio
ISP
Islip
$447 Roundtrip, found 1 day ago
$447
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Mon, Jul 13 from San Antonio to Islip, returning Tue, Jul 14, priced at $447 found 1 day ago
Southwest Airlines
Thu, Jul 16 - Tue, Jul 21
SAT
San Antonio
ISP
Islip
$447 Roundtrip, found 4 days ago
$447
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Thu, Jul 16 from San Antonio to Islip, returning Tue, Jul 21, priced at $447 found 4 days ago
Southwest Airlines
Fri, Jun 26 - Mon, Jun 29
SAT
San Antonio
ISP
Islip
$452 Roundtrip, found 1 day ago
$452
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Fri, Jun 26 from San Antonio to Islip, returning Mon, Jun 29, priced at $452 found 1 day ago
Breeze Airways
Fri, May 8 - Sat, May 23
SAT
San Antonio
ISP
Islip
$601 Roundtrip, found 1 day ago
$601
Roundtrip
found 1 day ago
Select Breeze Airways flight, departing Fri, May 8 from San Antonio to Islip, returning Sat, May 23, priced at $601 found 1 day ago

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Alternative airports near Islip

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

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $1,056
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $1,056

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 $101 or cheap return flight from $200 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 April 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

Origin airport
San Antonio Intl.
Destination airport
MacArthur
Airlines serving
Southwest Airlines
Roundtrip price
$200
Distance
1622 mi

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 April. 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 2026. You can also book with separate airlines for your outbound and return journeys, from $101 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

*Flight schedules are subject to change.

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