HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$98+ Cheap flights from San Antonio to Islip, NY (SAT - ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/26. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Nov 23 — Nov 301
Sun 11/23
Sun 11/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Antonio to Islip with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Find flight deals from San Antonio to Islip

Cheapest flights from San Antonio to Islip
Explore the most affordable flight options available from San Antonio to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 24, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/207:38 pmSAT - ISP
1 stop13h 59mMultiple Airlines
Mon 11/249:02 amISP - SAT
1 stop11h 19mMultiple Airlines
Deal found 10/22$236
This Southwest deal was found by Cheapflights users on 10/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2011:55 amSAT - ISP
2 stops9h 10mSouthwest
Mon 11/241:40 pmISP - SAT
2 stops9h 00mSouthwest
Deal found 10/22$529
This Kiwi.com deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/244:55 pmSAT - ISP
1 stop16h 42mMultiple Airlines
Thu 11/67:36 pmISP - SAT
2 stops47h 56mMultiple Airlines
Deal found 10/23$584
This Kiwi.com deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/234:55 pmSAT - ISP
1 stop16h 42mMultiple Airlines
Thu 11/67:36 pmISP - SAT
2 stops47h 56mMultiple Airlines
Deal found 10/23$601
This Southwest deal was found by Cheapflights users on 10/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/231:50 pmSAT - ISP
2 stops8h 55mSouthwest
Thu 11/61:40 pmISP - SAT
2 stops9h 00mSouthwest
Deal found 10/23$812

Cheap flight deals from San Antonio to Islip

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated October 24, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$236
(Kiwi.com)

One-way from

$98
(Kiwi.com)

Popular in

December

Cheapest in

August

Average price

$348
Provider with most accurate pricing for San Antonio-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Antonio-Islip Long Island flights.
Search Deals
From San Antonio to Islip Long Island
Search Deals
One-way flight from San Antonio to Islip Long Island
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Antonio to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 24, 2025.
Use the filters below to find and compare flights from San Antonio to Islip that are best for you.

Fly from

San Antonio

Fly to

Islip

Route

Depart

Return

Price

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Thu 11/20

7:38 pm-10:37 am

1 stop13h 59m

Islip Long Island

Mon 11/24

9:02 am-7:21 pm

1 stop11h 19m

$236

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Thu 11/20

11:55 am-10:05 pm

2 stops9h 10m

Islip Long Island

Mon 11/24

1:40 pm-9:40 pm

2 stops9h 00m

$529

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Wed 11/26

8:33 pm-9:07 am

1 stop11h 34m

$98

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Thu 11/20

7:38 pm-10:37 am

1 stop13h 59m

$99

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Tue 11/25

7:37 pm-9:07 am

2 stops36h 30m

$132

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sat 11/22

7:04 pm-10:09 am

1 stop14h 05m

$137

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Mon 11/24

8:33 pm-10:18 am

1 stop12h 45m

$147

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Fri 11/21

8:33 pm-8:02 am

1 stop10h 29m

$152

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Thu 10/30

8:43 pm-10:37 am

2 stops12h 54m

$154

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Wed 10/29

7:00 am-5:42 pm

3 stops33h 42m

$176

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 12 results
1
2

Compare providers for flights from San Antonio to Islip

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Islip in October.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Antonio-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Antonio-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from San Antonio to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from San Antonio with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Antonio to Islip

What is the cheapest month to book a flight from San Antonio to Islip, New York?

Currently, January is the cheapest month in which you can book a flight from San Antonio to Islip, New York (average of $98). Flying from San Antonio to Islip, New York in July is currently the most expensive (average of $166). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated October 24, 2025.
Read through reviews of airlines operating flights from San Antonio to Islip, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,236 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,236 reviews
Southwest
8.0
Very good
4,236 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Overall

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from San Antonio to Islip, New York?

    For as low as $529, Southwest can have you in Islip, New York from San Antonio in 9h 10m. The distance between San Antonio and Islip, New York is about 1621 mi.

  • Can I find deals for flights from San Antonio to Islip that include hotel bookings?

    Yes. In addition to deals on San Antonio to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Antonio to Islip.

  • Can I find deals for business class flights from San Antonio to Islip?

    Yes. Cheapflights offers flight deals from San Antonio to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Antonio to Islip, New York?

    Currently, January is the cheapest month in which you can book a flight from San Antonio to Islip, New York (average of $98). Flying from San Antonio to Islip, New York in July is currently the most expensive (average of $166). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Antonio to Islip

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to LaGuardia flights
Dallas/Fort Worth to Newark flights
Hobby to John F Kennedy Intl flights
Hobby to Newark flights
Hobby to LaGuardia flights
George Bush Intcntl to John F Kennedy Intl flights
George Bush Intcntl to Newark flights
Austin to John F Kennedy Intl flights
George Bush Intcntl to LaGuardia flights
Austin to Newark flights
Love Field to LaGuardia flights
Austin to LaGuardia flights
San Antonio to John F Kennedy Intl flights
San Antonio to Newark flights
San Antonio to LaGuardia flights
Dallas/Fort Worth to Buffalo flights
Love Field to Newark flights
Dallas/Fort Worth to White Plains flights
Love Field to John F Kennedy Intl flights
Dallas/Fort Worth to Islip flights
Dallas/Fort Worth to Rochester flights
El Paso to John F Kennedy Intl flights
El Paso to LaGuardia flights
El Paso to Newark flights
Hobby to Buffalo flights
Love Field to White Plains flights
George Bush Intcntl to Stewart flights
Hobby to Albany flights
McAllen to Newark flights
Dallas/Fort Worth to Albany flights
McAllen to John F Kennedy Intl flights
Dallas/Fort Worth to Syracuse flights
Austin to Buffalo flights
Hobby to White Plains flights
Harlingen to Newark flights
Dallas/Fort Worth to Stewart flights
Hobby to Syracuse flights
McAllen to LaGuardia flights
George Bush Intcntl to Albany flights
George Bush Intcntl to Buffalo flights
Austin to Syracuse flights
Amarillo to Newark flights
Austin to White Plains flights
George Bush Intcntl to White Plains flights
Love Field to Buffalo flights
George Bush Intcntl to Syracuse flights
Austin to Albany flights
Lubbock to Newark flights
Hobby to Rochester flights

Top airline flying from San Antonio to Islip

Discover the top airline that operate flights from San Antonio to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$309Average$426FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
Cookie settings©2025 Cheapflights