HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$183+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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.

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 July 3, 2025.

Round-trip from

$351
(Southwest)

One-way from

$183
(Frontier)

Popular in

December

Cheapest in

September

Average price

$279
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. 13% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

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 July 3, 2025.

This Southwest deal was found by Cheapflights users on 7/1. 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 8/76:35 amSAT - ISP
1 stop8h 00mSouthwest
Thu 8/144:20 pmISP - SAT
1 stop6h 50mSouthwest
Deal found 7/1$351
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/75:38 pmSAT - ISP
3 stops20h 41mMultiple Airlines
Thu 8/147:39 pmISP - SAT
2 stops22h 09mMultiple Airlines
Deal found 7/1$724

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 July 3, 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 8/7

6:35 am-3:35 pm

1 stop8h 00m

Islip Long Island

Thu 8/14

4:20 pm-10:10 pm

1 stop6h 50m

$351

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Thu 8/7

5:38 pm-3:19 pm

3 stops20h 41m

Islip Long Island

Thu 8/14

7:39 pm-4:48 pm

2 stops22h 09m

$724

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sat 8/9

6:59 pm-1:04 pm

2 stops17h 05m

$183

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sat 8/9

5:05 am-12:05 pm

1 stop6h 00m

$191

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sat 8/9

9:39 am-1:24 pm

3 stops26h 45m

$444

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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 $108). Flying from San Antonio to Islip, New York in November is currently the most expensive (average of $213). 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 July 3, 2025.
Read through reviews of airlines operating flights from San Antonio to Islip, such as Southwest and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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
4,270 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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.
Frontier
5.9
Fair
3,284 reviews
Southwest
8.0
Very good
4,270 reviews

Crew

8.6

Food

7.0

Entertainment

7.6

Comfort

8.0

Boarding

8.2

Overall

8.0

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.

  • What are the cheapest airlines flying from San Antonio to Islip, New York round-trip?

    According to our current data, Southwest ($351), and Frontier ($1,325) offers the cheapest pricing from San Antonio to Islip, New York.

  • 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 $108). Flying from San Antonio to Islip, New York in November is currently the most expensive (average of $213). 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 San Antonio?

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

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 LaGuardia flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Newark flights
Hobby to LaGuardia flights
Hobby to Newark flights
Hobby to John F Kennedy Intl flights
George Bush Intcntl to Newark flights
George Bush Intcntl to LaGuardia flights
Austin to Newark flights
George Bush Intcntl to John F Kennedy Intl flights
Austin to John F Kennedy Intl flights
Love Field to LaGuardia flights
Austin to LaGuardia flights
San Antonio to Newark flights
San Antonio to John F Kennedy Intl flights
Dallas/Fort Worth to Buffalo flights
San Antonio to LaGuardia flights
Hobby to Buffalo flights
Austin to Albany flights
Dallas/Fort Worth to Syracuse flights
Dallas/Fort Worth to Albany flights
George Bush Intcntl to Buffalo flights
Dallas/Fort Worth to Rochester flights
Dallas/Fort Worth to Islip flights
Austin to Buffalo flights
McAllen to Newark flights
Dallas/Fort Worth to Ithaca flights
Hobby to Rochester flights
Dallas/Fort Worth to Binghamton flights
Austin to Syracuse flights
Love Field to Buffalo flights
El Paso to LaGuardia flights
El Paso to John F Kennedy Intl flights
McAllen to LaGuardia flights
Love Field to Newark flights
El Paso to Newark flights
George Bush Intcntl to Rochester flights
Dallas/Fort Worth to Stewart flights
Hobby to Syracuse flights
McAllen to John F Kennedy Intl flights
Love Field to John F Kennedy Intl flights
Hobby to Albany flights
Love Field to Syracuse flights
George Bush Intcntl to Syracuse flights
Hobby to White Plains flights
Dallas/Fort Worth to White Plains flights
Austin to Stewart flights
Love Field to Ithaca flights
Love Field to Albany flights
San Antonio to Buffalo 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$314Average$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.