$255+ Cheap flights from San Antonio to Islip, NY (SAT - ISP)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/26. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Nov 6 — Nov 131
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 October 7, 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 October 7, 2026.
This Southwest deal was found by Cheapflights users on 10/6. 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 10/275:15 am -
1 stop5h 55m
Fri 10/305:40 pm -
1 stop6h 25m
Deal found 10/6![Southwest logo]()
$413
This Southwest deal was found by Cheapflights users on 10/5. 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 11/225:15 am -
1 stop5h 30m
Wed 12/24:05 pm -
1 stop6h 20m
Deal found 10/5![Southwest logo]()
$450
This Southwest deal was found by Cheapflights users on 10/5. 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 12/115:20 pm -
1 stop5h 10m
Sun 12/135:35 am -
1 stop6h 40m
Deal found 10/5![Southwest logo]()
$452
This Southwest deal was found by Cheapflights users on 10/5. 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 12/105:40 am -
1 stop8h 50m
Sun 12/135:35 am -
1 stop6h 40m
Deal found 10/5![Southwest logo]()
$497
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 October 7, 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 October 7, 2026.
This Southwest deal was found by Cheapflights users on 10/6. 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 10/285:15 am -
1 stop5h 55m
Fri 10/306:00 am -
1 stop6h 00m
Deal found 10/6![Southwest logo]()
$413
This Southwest deal was found by Cheapflights users on 10/6. 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 10/2712:55 pm -
2 stops8h 45m
Fri 10/3011:00 am -
2 stops8h 05m
Deal found 10/6![Southwest logo]()
$424
This Southwest deal was found by Cheapflights users on 10/5. 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 11/225:15 am -
1 stop5h 30m
Wed 12/24:05 pm -
1 stop6h 20m
Deal found 10/5![Southwest logo]()
$450
This Southwest deal was found by Cheapflights users on 10/5. 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 12/115:20 pm -
1 stop5h 10m
Sun 12/135:35 am -
1 stop6h 40m
Deal found 10/5![Southwest logo]()
$452
This Southwest deal was found by Cheapflights users on 10/5. 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 12/1012:20 pm -
2 stops8h 20m
Sun 12/135:40 pm -
1 stop6h 10m
Deal found 10/5![Southwest logo]()
$502
This Southwest deal was found by Cheapflights users on 10/2. 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 10/1811:15 am -
1 stop11h 25m
Thu 10/223:10 pm -
1 stop8h 55m
Deal found 10/2![Southwest logo]()
$622
Last-minute flights from San Antonio to IslipDiscover last-minute flight deals from San Antonio to Islip. Data last updated October 7, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Islip. Data last updated October 7, 2026 and is based on user searches.
This KAYAK deal was found by Cheapflights users on 10/5. 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 10/89:25 am -
1 stop27h 57m
Wed 10/1412:00 pm -
1 stop21h 45m
Deal found 10/5![Breeze Airways logo]()
$998
This Southwest deal was found by Cheapflights users on 10/2. 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 10/1811:15 am -
1 stop11h 25m
Thu 10/223:10 pm -
1 stop8h 55m
Deal found 10/2![Southwest logo]()
$622
This Booking.com deal was found by Cheapflights users on 10/2. 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.
Sun 10/189:25 am -
3 stops50h 33m
Thu 10/2210:57 am -
2 stops26h 01m
Deal found 10/2![Breeze Airways logo]()
$1,069
This Southwest deal was found by Cheapflights users on 10/6. 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 10/275:15 am -
1 stop5h 55m
Fri 10/305:40 pm -
1 stop6h 25m
Deal found 10/6![Southwest logo]()
$413
This Southwest deal was found by Cheapflights users on 10/5. 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 11/225:15 am -
1 stop5h 30m
Wed 12/24:05 pm -
1 stop6h 20m
Deal found 10/5![Southwest logo]()
$450
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 October 7, 2026.
Search for one-way flight options from San Antonio to Islip. Find affordable one-way fares based on user searches. Data last updated October 7, 2026.
This Frontier deal was found by Cheapflights users on 10/6. 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.
Mon 10/2610:03 am -
1 stop6h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$255
This KAYAK deal was found by Cheapflights users on 10/6. 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 10/229:25 am -
1 stop27h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Breeze Airways logo]()
$340
This Mytrip deal was found by Cheapflights users on 10/6. 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 10/172:47 pm -
2 stops25h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Frontier logo]()
$461
This KAYAK deal was found by Cheapflights users on 10/6. 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 10/1612:38 pm -
2 stops21h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Breeze Airways logo]()
$465
This Southwest deal was found by Cheapflights users on 10/6. 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 10/177:00 am -
1 stop8h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Southwest logo]()
$504
This KAYAK deal was found by Cheapflights users on 10/6. 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 10/189:25 am -
1 stop27h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/6![Breeze Airways logo]()
$630
This Frontier deal was found by Cheapflights users on 10/5. 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.
Thu 11/264:03 pm -
2 stops22h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Frontier logo]()
$633
This KAYAK deal was found by Cheapflights users on 10/5. 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 11/59:25 am -
2 stops24h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/5![Breeze Airways logo]()
$650
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 October 7, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $410 (Kiwi.com) |
One-way from | $255 (Frontier) |
Popular in | July |
Cheapest in | January |
Average price | $422 |
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 October 7, 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
Mon 10/26
10:03 am-6:00 pm
1 stop6h 57m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$255
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 10/16
10:03 am-6:00 pm
1 stop6h 57m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$255
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Thu 10/22
9:25 am-2:22 pm
1 stop27h 57m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$340
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Wed 10/28
5:15 am-12:10 pm
1 stop5h 55m
Islip Long Island
Fri 10/30
6:00 am-11:00 am
1 stop6h 00m
$413
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Tue 10/27
12:55 pm-10:40 pm
2 stops8h 45m
Islip Long Island
Fri 10/30
11:00 am-6:05 pm
2 stops8h 05m
$424
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sun 11/22
5:15 am-11:45 am
1 stop5h 30m
Islip Long Island
Wed 12/2
4:05 pm-9:25 pm
1 stop6h 20m
$450
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 12/11
5:20 pm-11:30 pm
1 stop5h 10m
Islip Long Island
Sun 12/13
5:35 am-11:15 am
1 stop6h 40m
$452
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Fri 10/16
12:38 pm-11:20 am
2 stops21h 42m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$465
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Thu 12/10
12:20 pm-9:40 pm
2 stops8h 20m
Islip Long Island
Sun 12/13
5:40 pm-10:50 pm
1 stop6h 10m
$502
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 10/17
7:00 am-4:10 pm
1 stop8h 10m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$504
Showing 1-10 of 14 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 October 7, 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
Comfort
8.0
Crew
8.6
Overall
7.9
Boarding
8.1
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Overall
7.9
Boarding
8.1
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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San Antonio and Islip flights
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Browse through other flights departing from San Antonio. Flights are based on user searches made on Cheapflights and were last updated on October 7, 2026.
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Check out other popular destinations found by fellow travelers in 2026
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 October 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$368 | Average$574 | FlexibilityNo cancel fee | On-time63% |