$226+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Sep 17 — Sep 241
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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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 18, 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 18, 2026.
This Frontier deal was found by Cheapflights users on 8/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/29:07 pm -
1 stop10h 54m
Mon 12/79:56 am -
1 stop11h 16m
Deal found 8/16![Frontier logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:30 am -
2 stops28h 17m
Fri 9/410:57 am -
1 stop22h 59m
Deal found 8/16![Multiple Airlines logo]()
$427
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 8/295:38 pm -
2 stops39h 15m
Wed 9/211:57 am -
1 stop22h 18m
Deal found 8/13![Multiple Airlines logo]()
$466
This Southwest deal was found by Cheapflights users on 8/13. 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 8/296:00 am -
1 stop7h 30m
Wed 9/26:05 am -
1 stop5h 55m
Deal found 8/13![Southwest logo]()
$488
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:55 am -
1 stop26h 33m
Thu 9/310:57 am -
1 stop22h 59m
Deal found 8/14![Multiple Airlines logo]()
$537
This Southwest deal was found by Cheapflights users on 8/16. 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.
Mon 8/312:55 pm -
1 stop6h 10m
Fri 9/46:10 am -
1 stop7h 15m
Deal found 8/16![Southwest logo]()
$597
This KAYAK deal was found by Cheapflights users on 8/16. 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.
Thu 12/39:25 am -
1 stop27h 57m
Sun 12/610:57 am -
2 stops26h 01m
Deal found 8/16![Breeze Airways logo]()
$604
This Southwest deal was found by Cheapflights users on 8/14. 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.
Sun 8/307:25 am -
2 stops7h 30m
Thu 9/34:05 pm -
2 stops8h 15m
Deal found 8/14![Southwest logo]()
$634
This KAYAK deal was found by Cheapflights users on 8/16. 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.
Sun 12/69:25 am -
1 stop27h 57m
Wed 12/93:43 pm -
3 stops45h 15m
Deal found 8/16![Breeze Airways logo]()
$743
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 18, 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 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:30 am -
2 stops28h 17m
Fri 9/410:57 am -
1 stop22h 59m
Deal found 8/16![Multiple Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 8/13. 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 8/296:00 am -
1 stop7h 30m
Wed 9/26:05 am -
1 stop5h 55m
Deal found 8/13![Southwest logo]()
$488
This KAYAK deal was found by Cheapflights users on 8/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/39:25 am -
1 stop27h 57m
Tue 12/86:17 pm -
2 stops39h 28m
Deal found 8/15![Breeze Airways logo]()
$783
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 8/295:38 pm -
2 stops39h 15m
Wed 9/211:57 am -
1 stop22h 18m
Deal found 8/13![Multiple Airlines logo]()
$466
This Southwest deal was found by Cheapflights users on 8/16. 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.
Mon 8/312:55 pm -
1 stop6h 10m
Fri 9/46:10 am -
1 stop7h 15m
Deal found 8/16![Southwest logo]()
$597
This Southwest deal was found by Cheapflights users on 8/14. 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.
Sun 8/307:25 am -
2 stops7h 30m
Thu 9/34:05 pm -
2 stops8h 15m
Deal found 8/14![Southwest logo]()
$634
This Booking.com deal was found by Cheapflights users on 8/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:30 am -
2 stops28h 17m
Fri 9/41:00 pm -
3 stops28h 58m
Deal found 8/16![Breeze Airways logo]()
$799
This KAYAK deal was found by Cheapflights users on 8/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2312:38 pm -
2 stops21h 42m
Thu 11/2610:57 am -
2 stops26h 01m
Deal found 8/15![Breeze Airways logo]()
$999
This Mytrip deal was found by Cheapflights users on 8/13. 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.
Sat 8/295:38 pm -
3 stops22h 32m
Wed 9/27:41 pm -
3 stops40h 09m
Deal found 8/13![Breeze Airways logo]()
$1,064
Last-minute flights from San Antonio to IslipDiscover last-minute flight deals from San Antonio to Islip. Data last updated August 18, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Islip. Data last updated August 18, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 8/295:38 pm -
2 stops39h 15m
Wed 9/211:57 am -
1 stop22h 18m
Deal found 8/13![Multiple Airlines logo]()
$466
This Southwest deal was found by Cheapflights users on 8/13. 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 8/296:00 am -
1 stop7h 30m
Wed 9/26:05 am -
1 stop5h 55m
Deal found 8/13![Southwest logo]()
$488
This Mytrip deal was found by Cheapflights users on 8/13. 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.
Sat 8/295:38 pm -
3 stops22h 32m
Wed 9/27:41 pm -
3 stops40h 09m
Deal found 8/13![Breeze Airways logo]()
$1,064
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:55 am -
1 stop26h 33m
Thu 9/310:57 am -
1 stop22h 59m
Deal found 8/14![Multiple Airlines logo]()
$537
This Southwest deal was found by Cheapflights users on 8/14. 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.
Sun 8/307:25 am -
2 stops7h 30m
Thu 9/34:05 pm -
2 stops8h 15m
Deal found 8/14![Southwest logo]()
$634
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:30 am -
2 stops28h 17m
Fri 9/410:57 am -
1 stop22h 59m
Deal found 8/16![Multiple Airlines logo]()
$427
This Southwest deal was found by Cheapflights users on 8/16. 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.
Mon 8/312:55 pm -
1 stop6h 10m
Fri 9/46:10 am -
1 stop7h 15m
Deal found 8/16![Southwest logo]()
$597
This Booking.com deal was found by Cheapflights users on 8/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:30 am -
2 stops28h 17m
Fri 9/41:00 pm -
3 stops28h 58m
Deal found 8/16![Breeze Airways logo]()
$799
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 18, 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 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:26 pm -
3 stops16h 07m
Deal found 8/17![Multiple Airlines logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:55 am -
1 stop26h 33m
Deal found 8/16![Breeze Airways logo]()
$256
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/309:55 am -
2 stops22h 58m
Deal found 8/16![Multiple Airlines logo]()
$263
This Southwest deal was found by Cheapflights users on 8/17. 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.
Tue 9/12:35 pm -
1 stop5h 30m
Deal found 8/17![Southwest logo]()
$299
This KAYAK deal was found by Cheapflights users on 8/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/49:25 am -
1 stop27h 57m
Deal found 8/15![Breeze Airways logo]()
$350
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 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $388 (Frontier) |
One-way from | $191 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $360 |
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 August 18, 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
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Mon 8/31
11:30 am-4:47 pm
2 stops28h 17m
Islip Long Island
Fri 9/4
10:57 am-8:56 am
1 stop22h 59m
$427
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 8/29
5:38 pm-9:53 am
2 stops39h 15m
Islip Long Island
Wed 9/2
11:57 am-9:15 am
1 stop22h 18m
$466
Quickest round-trip
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 8/29
6:00 am-2:30 pm
1 stop7h 30m
Islip Long Island
Wed 9/2
6:05 am-11:00 am
1 stop5h 55m
$488
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Mon 8/31
2:55 pm-10:05 pm
1 stop6h 10m
Islip Long Island
Fri 9/4
6:10 am-12:25 pm
1 stop7h 15m
$597
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sun 8/30
7:25 am-3:55 pm
2 stops7h 30m
Islip Long Island
Thu 9/3
4:05 pm-11:20 pm
2 stops8h 15m
$634
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Thu 12/3
9:25 am-2:22 pm
1 stop27h 57m
Islip Long Island
Tue 12/8
6:17 pm-8:45 am
2 stops39h 28m
$783
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Mon 8/31
11:30 am-4:47 pm
2 stops28h 17m
Islip Long Island
Fri 9/4
1:00 pm-4:58 pm
3 stops28h 58m
$799
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Mon 11/23
12:38 pm-11:20 am
2 stops21h 42m
Islip Long Island
Thu 11/26
10:57 am-11:58 am
2 stops26h 01m
$999
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 8/29
5:38 pm-5:10 pm
3 stops22h 32m
Islip Long Island
Wed 9/2
7:41 pm-10:50 am
3 stops40h 09m
$1,064
Cheapest one-way
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Tue 9/1
8:26 pm-1:33 pm
3 stops16h 07m
$226
Showing 1-10 of 13 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 18, 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.
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
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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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 August 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$309 | Average$456 | FlexibilityNo cancel fee | On-time63% |