$168+ 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 5/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
May 20 — May 271
Round-trip
1 adult, Economy
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Find cheap flights from San Antonio to Islip with Cheapflights
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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
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Best
Last-minute
One-way
Cheapest flights from San Antonio to IslipExplore 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 20, 2026.
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 20, 2026.
This Southwest deal was found by Cheapflights users on 4/15. 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.
Mon 5/185:00 am
SAT
- ISP
1 stop5h 50m
Southwest
Tue 5/264:10 pm
ISP
- SAT
1 stop6h 30m
Southwest
Deal found 4/15![Southwest logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 4/15. 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.
Sat 4/252:12 pm
SAT
- ISP
1 stop18h 01m
Multiple Airlines
Tue 5/55:38 pm
ISP
- SAT
2 stops51h 36m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$438
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:55 am
SAT
- ISP
1 stop6h 00m
Southwest
Fri 8/76:10 am
ISP
- SAT
1 stop7h 15m
Southwest
Deal found 4/16![Southwest logo]()
$447
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 6/55:10 am
SAT
- ISP
1 stop5h 40m
Southwest
Sun 6/75:55 pm
ISP
- SAT
1 stop7h 20m
Southwest
Deal found 4/17![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 4/14. 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 7/31:50 pm
SAT
- ISP
2 stops8h 45m
Southwest
Mon 7/66:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 4/14![Southwest logo]()
$542
Best flights from San Antonio to IslipDiscover carefully curated flight deals from San Antonio to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 20, 2026.
Discover carefully curated flight deals from San Antonio to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 20, 2026.
This Southwest deal was found by Cheapflights users on 4/15. 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.
Mon 5/185:00 am
SAT
- ISP
1 stop5h 50m
Southwest
Tue 5/264:10 pm
ISP
- SAT
1 stop6h 30m
Southwest
Deal found 4/15![Southwest logo]()
$391
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:30 am
SAT
- ISP
2 stops28h 17m
Breeze Airways
Wed 5/1311:57 am
ISP
- SAT
1 stop22h 03m
Breeze Airways
Deal found 4/17![Breeze Airways logo]()
$674
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/47:55 am
SAT
- ISP
1 stop6h 00m
Southwest
Fri 8/76:10 am
ISP
- SAT
1 stop7h 15m
Southwest
Deal found 4/16![Southwest logo]()
$447
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 6/55:10 am
SAT
- ISP
1 stop5h 40m
Southwest
Sun 6/75:55 pm
ISP
- SAT
1 stop7h 20m
Southwest
Deal found 4/17![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 4/14. 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 7/31:50 pm
SAT
- ISP
2 stops8h 45m
Southwest
Mon 7/66:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 4/14![Southwest logo]()
$542
Last-minute flights from San Antonio to IslipDiscover last-minute flight deals from San Antonio to Islip. Data last updated April 20, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Islip. Data last updated April 20, 2026 and is based on user searches.
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 4/244:30 pm
SAT
- ISP
1 stop6h 00m
Southwest
Mon 4/274:30 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 4/17![Southwest logo]()
$937
This Kiwi.com deal was found by Cheapflights users on 4/15. 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.
Sat 4/252:12 pm
SAT
- ISP
1 stop18h 01m
Multiple Airlines
Tue 5/55:38 pm
ISP
- SAT
2 stops51h 36m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$438
This Southwest deal was found by Cheapflights users on 4/15. 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.
Sat 4/255:15 am
SAT
- ISP
1 stop6h 55m
Southwest
Tue 5/54:10 pm
ISP
- SAT
1 stop6h 30m
Southwest
Deal found 4/15![Southwest logo]()
$807
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:30 am
SAT
- ISP
2 stops28h 17m
Breeze Airways
Wed 5/1311:57 am
ISP
- SAT
1 stop22h 03m
Breeze Airways
Deal found 4/17![Breeze Airways logo]()
$674
This Southwest deal was found by Cheapflights users on 4/15. 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.
Mon 5/185:00 am
SAT
- ISP
1 stop5h 50m
Southwest
Tue 5/264:10 pm
ISP
- SAT
1 stop6h 30m
Southwest
Deal found 4/15![Southwest logo]()
$391
This Gotogate deal was found by Cheapflights users on 4/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1811:30 am
SAT
- ISP
2 stops28h 17m
Breeze Airways
Tue 5/262:08 pm
ISP
- SAT
3 stops44h 02m
Breeze Airways
Deal found 4/15![Breeze Airways logo]()
$878
One-way flights from San Antonio to IslipSearch for one-way flight options from San Antonio to Islip. Find affordable one-way fares based on user searches. Data last updated April 20, 2026.
Search for one-way flight options from San Antonio to Islip. Find affordable one-way fares based on user searches. Data last updated April 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 5/16:00 am
SAT
- ISP
2 stops12h 36m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$168
This Southwest deal was found by Cheapflights users on 4/15. 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.
Wed 5/133:45 pm
SAT
- ISP
1 stop5h 25m
Southwest
Deal found 4/15![Southwest logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 4/15. 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.
Mon 6/2211:30 am
SAT
- ISP
3 stops24h 58m
Breeze Airways
Deal found 4/15![Breeze Airways logo]()
$228
This Southwest deal was found by Cheapflights users on 4/15. 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.
Mon 6/223:45 pm
SAT
- ISP
1 stop6h 50m
Southwest
Deal found 4/15![Southwest logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 4/15. 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.
Wed 5/137:54 pm
SAT
- ISP
3 stops22h 19m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$246
This Southwest deal was found by Cheapflights users on 4/15. 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 5/15:00 am
SAT
- ISP
1 stop5h 50m
Southwest
Deal found 4/15![Southwest logo]()
$294
This KAYAK deal was found by Cheapflights users on 4/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/79:55 am
SAT
- ISP
1 stop26h 33m
Breeze Airways
Deal found 4/14![Breeze Airways logo]()
$370
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1111:30 am
SAT
- ISP
2 stops28h 17m
Breeze Airways
Deal found 4/16![Breeze Airways logo]()
$385
This KAYAK deal was found by Cheapflights users on 4/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/811:30 am
SAT
- ISP
2 stops22h 47m
Breeze Airways
Deal found 4/14![Breeze Airways logo]()
$435
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/265:15 am
SAT
- ISP
1 stop5h 35m
Southwest
Deal found 4/16![Southwest logo]()
$469
Find 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 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $391 (Southwest) |
One-way from | $168 (Kiwi.com) |
Popular in | March |
Cheapest in | August |
Average price | $366 |
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 20, 2026.
Use the filters below to find and compare flights from San Antonio to Islip that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Mon 5/18
5:00 am-11:50 am
1 stop5h 50m
Islip Long Island
Tue 5/26
4:10 pm-9:40 pm
1 stop6h 30m
$391
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Tue 8/4
7:55 am-2:55 pm
1 stop6h 00m
Islip Long Island
Fri 8/7
6:10 am-12:25 pm
1 stop7h 15m
$447
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Fri 6/5
5:10 am-11:50 am
1 stop5h 40m
Islip Long Island
Sun 6/7
5:55 pm-12:15 am
1 stop7h 20m
$467
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Fri 7/3
1:50 pm-11:35 pm
2 stops8h 45m
Islip Long Island
Mon 7/6
6:05 pm-11:50 pm
1 stop6h 45m
$542
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Mon 5/11
11:30 am-4:47 pm
2 stops28h 17m
Islip Long Island
Wed 5/13
11:57 am-9:00 am
1 stop22h 03m
$674
Cheapest one-way
Quickest one-way
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Wed 5/13
3:45 pm-10:10 pm
1 stop5h 25m
$192
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Mon 6/22
3:45 pm-11:35 pm
1 stop6h 50m
$244
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Fri 5/1
5:00 am-11:50 am
1 stop5h 50m
$294
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Thu 5/7
9:55 am-1:28 pm
1 stop26h 33m
$370
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Mon 5/11
11:30 am-4:47 pm
2 stops28h 17m
$385
Showing 1-10 of 12 resultsSorted by cheapest first
- 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.
SAT-ISP
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.
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 20, 2026.
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.
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
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.
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Book flights to Islip if you plan to visit one of these locationsRiverhead
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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 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$309 | Average$422 | FlexibilityNo cancel fee | On-time63% |