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Islip

$126+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
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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 April 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$241
(CheapOair)

One-way from

$126
(Frontier)

Popular in

December

Cheapest in

September

Average price

$299
Provider with most accurate pricing for San Antonio-Islip Long Island flight deals.
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Provider most trusted by Cheapflights users for San Antonio-Islip Long Island flights.
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From San Antonio to Islip Long Island
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One-way flight from San Antonio to Islip Long Island
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Highest demand for flights based on searches. 17% potential increase in price ($61 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 17, 2025.

This CheapOair deal was found by Cheapflights users on 4/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/98:31 pmSAT - ISP
1 stop13h 10mFrontier
Sun 5/116:48 pmISP - SAT
1 stop25h 43mFrontier
Deal found 4/16$241
This Southwest deal was found by Cheapflights users on 4/17. 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.
Fri 5/232:00 pmSAT - ISP
2 stops8h 05mSouthwest
Wed 5/286:10 amISP - SAT
1 stop7h 45mSouthwest
Deal found 4/17$375
This Mytrip deal was found by Cheapflights users on 4/17. 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.
Fri 5/231:27 pmSAT - ISP
3 stops23h 18mMultiple Airlines
Wed 5/282:25 pmISP - SAT
2 stops33h 26mMultiple Airlines
Deal found 4/17$644

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 April 17, 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

Fri 5/9

8:31 pm-10:41 am

1 stop13h 10m

Islip Long Island

Sun 5/11

6:48 pm-7:31 pm

1 stop25h 43m

$241

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Fri 5/23

2:00 pm-11:05 pm

2 stops8h 05m

Islip Long Island

Wed 5/28

6:10 am-12:55 pm

1 stop7h 45m

$375

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Fri 5/23

1:27 pm-1:45 pm

3 stops23h 18m

Islip Long Island

Wed 5/28

2:25 pm-10:51 pm

2 stops33h 26m

$644

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Fri 5/9

8:31 pm-10:41 am

1 stop13h 10m

$126

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Wed 5/7

7:05 am-6:25 pm

1 stop10h 20m

$144

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Wed 5/14

10:40 am-8:20 pm

2 stops8h 40m

$200

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/17

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 April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 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 eDreams the most. eDreams 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 $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.

Rainfall in Islip by month

Plan your trip to Islip by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

Temperature in Islip by month

Plan your trip to Islip by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 April 17, 2025.
Southwest
8.0
Very good
4,280 reviews

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.1

Boarding

8.2

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
4,280 reviews
Southwest
8.0
Very good
4,280 reviews

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.1

Boarding

8.2

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
6.0
Okay
3,281 reviews
Southwest
8.0
Very good
4,280 reviews

Entertainment

7.6

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.1

Boarding

8.2

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, Frontier ($241), and Southwest ($375) 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

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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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$410Average$426FlexibilityNo cancel feeOn-time63%

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