$135+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Sep 24 — Oct 11
Round-trip
1 adult, Economy
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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 August 25, 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 August 25, 2026.
This Southwest deal was found by Cheapflights users on 8/21. 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 10/305:10 am -
1 stop5h 35m
Mon 11/24:25 pm -
1 stop8h 30m
Deal found 8/21![Southwest logo]()
$396
This Southwest deal was found by Cheapflights users on 8/25. 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 9/196:00 am -
1 stop7h 30m
Mon 9/284:05 pm -
1 stop6h 30m
Deal found 8/25![Southwest logo]()
$423
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 10/89:25 am -
1 stop27h 57m
Mon 10/126:55 pm -
2 stops25h 31m
Deal found 8/23![Multiple Airlines logo]()
$436
This Southwest deal was found by Cheapflights users on 8/25. 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 12/105:30 am -
1 stop9h 45m
Mon 12/146:30 am -
1 stop9h 10m
Deal found 8/25![Southwest logo]()
$439
This Southwest deal was found by Cheapflights users on 8/24. 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 11/213:55 pm -
1 stop6h 50m
Mon 11/306:00 pm -
1 stop7h 55m
Deal found 8/24![Southwest logo]()
$529
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 August 25, 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 August 25, 2026.
This Southwest deal was found by Cheapflights users on 8/21. 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 10/305:10 am -
1 stop5h 35m
Mon 11/24:25 pm -
1 stop8h 30m
Deal found 8/21![Southwest logo]()
$396
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 10/89:25 am -
1 stop27h 57m
Mon 10/126:55 pm -
2 stops25h 31m
Deal found 8/23![Multiple Airlines logo]()
$436
This Southwest deal was found by Cheapflights users on 8/25. 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 12/106:45 am -
2 stops8h 30m
Mon 12/146:30 am -
1 stop9h 10m
Deal found 8/25![Southwest logo]()
$439
This Southwest deal was found by Cheapflights users on 8/24. 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 11/213:55 pm -
1 stop6h 50m
Mon 11/306:00 pm -
1 stop7h 55m
Deal found 8/24![Southwest logo]()
$529
This Southwest deal was found by Cheapflights users on 8/23. 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 10/85:10 am -
1 stop8h 20m
Mon 10/123:10 pm -
1 stop8h 50m
Deal found 8/23![Southwest logo]()
$607
Last-minute flights from San Antonio to IslipDiscover last-minute flight deals from San Antonio to Islip. Data last updated August 25, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Islip. Data last updated August 25, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 8/24. 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 9/411:30 am -
2 stops22h 47m
Wed 9/912:00 pm -
1 stop21h 45m
Deal found 8/24![Breeze Airways logo]()
$884
This KAYAK deal was found by Cheapflights users on 8/25. 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 9/411:30 am -
2 stops22h 47m
Tue 9/82:08 pm -
3 stops43h 37m
Deal found 8/25![Breeze Airways logo]()
$989
This Southwest deal was found by Cheapflights users on 8/25. 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 9/196:00 am -
1 stop7h 30m
Mon 9/284:05 pm -
1 stop6h 30m
Deal found 8/25![Southwest logo]()
$423
This United deal was found by Cheapflights users on 8/25. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/199:10 am -
3 stops24h 20m
Mon 9/282:16 pm -
2 stops22h 25m
Deal found 8/25![Multiple Airlines logo]()
$1,072
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 August 25, 2026.
Search for one-way flight options from San Antonio to Islip. Find affordable one-way fares based on user searches. Data last updated August 25, 2026.
This Priceline deal was found by Cheapflights users on 8/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:03 am -
1 stop6h 57m
Deal found 8/21![Frontier logo]()
$135
This Southwest deal was found by Cheapflights users on 8/21. 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 9/196:00 am -
1 stop7h 30m
Deal found 8/21![Southwest logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 10/1612:38 pm -
2 stops21h 42m
Deal found 8/21![Breeze Airways logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 8/24. 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 9/1810:05 am -
1 stop29h 53m
Deal found 8/24![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 9/1812:38 pm -
3 stops27h 20m
Deal found 8/21![Multiple Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 10/1612:38 pm -
3 stops27h 52m
Deal found 8/21![Multiple Airlines logo]()
$252
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 9/198:20 pm -
3 stops37h 52m
Deal found 8/21![Multiple Airlines logo]()
$331
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 August 25, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $396 (Southwest) |
One-way from | $135 (Priceline) |
Popular in | July |
Cheapest in | January |
Average price | $363 |
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 7,457,451 searches. Data last updated August 25, 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 San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 10/30
5:10 am-11:45 am
1 stop5h 35m
Islip Long Island
Mon 11/2
4:25 pm-11:55 pm
1 stop8h 30m
$396
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Thu 10/8
9:25 am-2:22 pm
1 stop27h 57m
Islip Long Island
Mon 10/12
6:55 pm-7:26 pm
2 stops25h 31m
$436
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Thu 12/10
6:45 am-4:15 pm
2 stops8h 30m
Islip Long Island
Mon 12/14
6:30 am-2:40 pm
1 stop9h 10m
$439
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 11/21
3:55 pm-11:45 pm
1 stop6h 50m
Islip Long Island
Mon 11/30
6:00 pm-12:55 am
1 stop7h 55m
$529
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Thu 10/8
5:10 am-2:30 pm
1 stop8h 20m
Islip Long Island
Mon 10/12
3:10 pm-11:00 pm
1 stop8h 50m
$607
Cheapest one-way
Quickest one-way
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 10/16
10:03 am-6:00 pm
1 stop6h 57m
$135
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 10/16
12:38 pm-11:20 am
2 stops21h 42m
$194
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 9/18
10:05 am-4:58 pm
1 stop29h 53m
$195
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 9/19
9:45 am-8:50 pm
2 stops10h 05m
$217
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 10/16
12:38 pm-5:30 pm
3 stops27h 52m
$252
Showing 1-10 of 11 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 August 25, 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.
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Crew
8.6
Comfort
8.0
Food
7.0
Entertainment
7.5
Boarding
8.1
Overall
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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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 7,457,451 searches. Data last updated August 25, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$368 | Average$488 | FlexibilityNo cancel fee | On-time63% |