$192+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Jun 8 — Jun 151
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 May 9, 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 May 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 8/69:55 am
SAT
- ISP
1 stop26h 33m
Breeze Airways
Tue 8/185:27 pm
ISP
- SAT
2 stops23h 46m
Breeze Airways
Deal found 5/4![Breeze Airways logo]()
$388
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/197:54 pm
SAT
- ISP
2 stops13h 11m
Multiple Airlines
Sat 5/2311:57 am
ISP
- SAT
1 stop22h 08m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 5/4. 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 8/62:55 pm
SAT
- ISP
1 stop6h 10m
Southwest
Tue 8/186:05 am
ISP
- SAT
1 stop5h 55m
Southwest
Deal found 5/4![Southwest logo]()
$425
This Southwest deal was found by Cheapflights users on 5/6. 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 6/95:15 am
SAT
- ISP
1 stop7h 30m
Southwest
Mon 6/226:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 5/6![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 5/8. 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 6/21:40 pm
SAT
- ISP
2 stops7h 30m
Southwest
Fri 6/56:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 5/8![Southwest logo]()
$472
This Southwest deal was found by Cheapflights users on 5/4. 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 5/195:45 am
SAT
- ISP
1 stop7h 05m
Southwest
Sat 5/2312:15 pm
ISP
- SAT
1 stop7h 30m
Southwest
Deal found 5/4![Southwest logo]()
$587
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 May 9, 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 May 9, 2026.
This Southwest deal was found by Cheapflights users on 5/4. 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 8/62:55 pm
SAT
- ISP
1 stop6h 10m
Southwest
Tue 8/186:05 am
ISP
- SAT
1 stop5h 55m
Southwest
Deal found 5/4![Southwest logo]()
$425
This KAYAK deal was found by Cheapflights users on 5/7. 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.
Wed 7/84:53 pm
SAT
- ISP
3 stops23h 17m
Breeze Airways
Sat 7/1111:57 am
ISP
- SAT
1 stop22h 18m
Breeze Airways
Deal found 5/7![Breeze Airways logo]()
$759
This Southwest deal was found by Cheapflights users on 5/6. 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 6/95:15 am
SAT
- ISP
1 stop7h 30m
Southwest
Mon 6/226:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 5/6![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 5/8. 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 6/21:40 pm
SAT
- ISP
2 stops7h 30m
Southwest
Fri 6/56:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 5/8![Southwest logo]()
$472
This Southwest deal was found by Cheapflights users on 5/4. 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 5/195:45 am
SAT
- ISP
1 stop7h 05m
Southwest
Sat 5/2312:15 pm
ISP
- SAT
1 stop7h 30m
Southwest
Deal found 5/4![Southwest logo]()
$587
Last-minute flights from San Antonio to IslipDiscover last-minute flight deals from San Antonio to Islip. Data last updated May 9, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Islip. Data last updated May 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/197:54 pm
SAT
- ISP
2 stops13h 11m
Multiple Airlines
Sat 5/2311:57 am
ISP
- SAT
1 stop22h 08m
Multiple Airlines
Deal found 5/4![Multiple Airlines logo]()
$398
This Southwest deal was found by Cheapflights users on 5/4. 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 5/195:45 am
SAT
- ISP
1 stop7h 05m
Southwest
Sat 5/2312:15 pm
ISP
- SAT
1 stop7h 30m
Southwest
Deal found 5/4![Southwest logo]()
$587
This KAYAK deal was found by Cheapflights users on 5/7. 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 5/2211:30 am
SAT
- ISP
2 stops22h 47m
Breeze Airways
Tue 5/262:08 pm
ISP
- SAT
3 stops44h 02m
Breeze Airways
Deal found 5/7![Breeze Airways logo]()
$999
This Southwest deal was found by Cheapflights users on 5/8. 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 6/21:40 pm
SAT
- ISP
2 stops7h 30m
Southwest
Fri 6/56:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 5/8![Southwest logo]()
$472
This KAYAK deal was found by Cheapflights users on 5/6. 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.
Mon 6/811:30 am
SAT
- ISP
2 stops30h 08m
Breeze Airways
Mon 6/158:43 pm
ISP
- SAT
3 stops44h 30m
Breeze Airways
Deal found 5/6![Breeze Airways logo]()
$944
This Southwest deal was found by Cheapflights users on 5/6. 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 6/95:15 am
SAT
- ISP
1 stop7h 30m
Southwest
Mon 6/226:05 pm
ISP
- SAT
1 stop6h 45m
Southwest
Deal found 5/6![Southwest logo]()
$467
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 May 9, 2026.
Search for one-way flight options from San Antonio to Islip. Find affordable one-way fares based on user searches. Data last updated May 9, 2026.
This Southwest deal was found by Cheapflights users on 5/4. 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 6/23:45 pm
SAT
- ISP
1 stop5h 25m
Southwest
Deal found 5/4![Southwest logo]()
$192
This KAYAK deal was found by Cheapflights users on 5/6. 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 5/2911:30 am
SAT
- ISP
2 stops22h 47m
Breeze Airways
Deal found 5/6![Breeze Airways logo]()
$355
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 5/158:59 pm
SAT
- ISP
2 stops36h 28m
Frontier
Deal found 5/8![Frontier logo]()
$368
This KAYAK deal was found by Cheapflights users on 5/6. 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 5/289:55 am
SAT
- ISP
1 stop26h 33m
Breeze Airways
Deal found 5/6![Breeze Airways logo]()
$370
This KAYAK deal was found by Cheapflights users on 5/7. 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 6/1911:30 am
SAT
- ISP
2 stops22h 47m
Breeze Airways
Deal found 5/7![Breeze Airways logo]()
$435
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 5/1511:30 am
SAT
- ISP
3 stops21h 35m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$441
This KAYAK deal was found by Cheapflights users on 5/7. 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 6/189:55 am
SAT
- ISP
1 stop26h 33m
Breeze Airways
Deal found 5/7![Breeze Airways logo]()
$470
This Southwest deal was found by Cheapflights users on 5/8. 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 5/155:00 am
SAT
- ISP
1 stop5h 50m
Southwest
Deal found 5/8![Southwest logo]()
$489
This KAYAK deal was found by Cheapflights users on 5/8. 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 5/1511:30 am
SAT
- ISP
2 stops22h 47m
Breeze Airways
Deal found 5/8![Breeze Airways logo]()
$525
This KAYAK deal was found by Cheapflights users on 5/7. 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.
Sat 6/204:53 pm
SAT
- ISP
3 stops23h 17m
Breeze Airways
Deal found 5/7![Breeze Airways logo]()
$571
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 May 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $388 (Kiwi.com) |
One-way from | $192 (Southwest) |
Popular in | March |
Cheapest in | September |
Average price | $399 |
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 May 9, 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
Thu 8/6
2:55 pm-10:05 pm
1 stop6h 10m
Islip Long Island
Tue 8/18
6:05 am-11:00 am
1 stop5h 55m
$425
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Tue 6/9
5:15 am-1:45 pm
1 stop7h 30m
Islip Long Island
Mon 6/22
6:05 pm-11:50 pm
1 stop6h 45m
$467
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Tue 6/2
1:40 pm-10:10 pm
2 stops7h 30m
Islip Long Island
Fri 6/5
6:05 pm-11:50 pm
1 stop6h 45m
$472
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Tue 5/19
5:45 am-1:50 pm
1 stop7h 05m
Islip Long Island
Sat 5/23
12:15 pm-6:45 pm
1 stop7h 30m
$587
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Wed 7/8
4:53 pm-5:10 pm
3 stops23h 17m
Islip Long Island
Sat 7/11
11:57 am-9:15 am
1 stop22h 18m
$759
Cheapest one-way
Quickest one-way
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Tue 6/2
3:45 pm-10:10 pm
1 stop5h 25m
$192
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Fri 5/29
11:30 am-11:17 am
2 stops22h 47m
$355
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Fri 5/15
8:59 pm-10:27 am
2 stops36h 28m
$368
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Thu 5/28
9:55 am-1:28 pm
1 stop26h 33m
$370
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Fri 6/19
11:30 am-11:17 am
2 stops22h 47m
$435
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 May 9, 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
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Boarding
8.1
Entertainment
7.5
Food
7.0
Comfort
8.0
Crew
8.6
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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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 May 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$309 | Average$422 | FlexibilityNo cancel fee | On-time63% |