$225+ Cheap flights from Islip, NY to San Antonio (ISP - SAT)
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 6/25. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — SAT
juil. 6 — juil. 131
Round-trip
1 adult, Economy
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Find cheap flights from Islip to San Antonio with Cheapflights
1. Tell us where you want to go
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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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to San Antonio
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Best
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One-way
Cheapest flights from Islip to San AntonioExplore the most affordable flight options available from Islip to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juin 6, 2026.
Explore the most affordable flight options available from Islip to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juin 6, 2026.
This Booking.com deal was found by Cheapflights users on 6/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/310:48 am
ISP
- SAT
1 stop29h 39m
Frontier
ven. 7/109:51 am
SAT
- ISP
1 stop23h 02m
Frontier
Deal found 6/5![Frontier logo]()
$363
This Southwest deal was found by Cheapflights users on 6/2. 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.
mar. 7/146:00 am
ISP
- SAT
1 stop5h 45m
Southwest
mar. 7/215:15 am
SAT
- ISP
1 stop5h 35m
Southwest
Deal found 6/2![Southwest logo]()
$395
This Southwest deal was found by Cheapflights users on 6/3. 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.
lun. 8/106:45 am
ISP
- SAT
1 stop6h 15m
Southwest
lun. 8/172:55 pm
SAT
- ISP
1 stop6h 10m
Southwest
Deal found 6/3![Southwest logo]()
$425
This Southwest deal was found by Cheapflights users on 6/5. 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.
jeu. 7/305:50 pm
ISP
- SAT
1 stop6h 35m
Southwest
mar. 8/112:35 pm
SAT
- ISP
1 stop5h 30m
Southwest
Deal found 6/5![Southwest logo]()
$431
This Southwest deal was found by Cheapflights users on 6/1. 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.
jeu. 10/1510:20 am
ISP
- SAT
1 stop7h 55m
Southwest
dim. 10/184:25 pm
SAT
- ISP
1 stop6h 10m
Southwest
Deal found 6/1![Southwest logo]()
$446
Best flights from Islip to San AntonioDiscover carefully curated flight deals from Islip to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated juin 6, 2026.
Discover carefully curated flight deals from Islip to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated juin 6, 2026.
This Southwest deal was found by Cheapflights users on 6/2. 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.
mar. 7/146:00 am
ISP
- SAT
1 stop5h 45m
Southwest
mar. 7/215:15 am
SAT
- ISP
1 stop5h 35m
Southwest
Deal found 6/2![Southwest logo]()
$395
This Southwest deal was found by Cheapflights users on 6/3. 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.
lun. 8/106:45 am
ISP
- SAT
1 stop6h 15m
Southwest
lun. 8/172:55 pm
SAT
- ISP
1 stop6h 10m
Southwest
Deal found 6/3![Southwest logo]()
$425
This Southwest deal was found by Cheapflights users on 6/5. 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.
jeu. 7/303:05 pm
ISP
- SAT
2 stops8h 50m
Southwest
mar. 8/1110:50 am
SAT
- ISP
2 stops9h 15m
Southwest
Deal found 6/5![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 6/1. 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.
jeu. 10/1510:20 am
ISP
- SAT
1 stop7h 55m
Southwest
dim. 10/184:25 pm
SAT
- ISP
1 stop6h 10m
Southwest
Deal found 6/1![Southwest logo]()
$446
This Southwest deal was found by Cheapflights users on 6/5. 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.
jeu. 7/306:00 am
ISP
- SAT
1 stop6h 50m
Southwest
jeu. 7/303:45 pm
SAT
- ISP
1 stop6h 55m
Southwest
Deal found 6/5![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 6/3. 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.
ven. 7/35:50 pm
ISP
- SAT
1 stop6h 30m
Southwest
jeu. 7/93:45 pm
SAT
- ISP
2 stops6h 55m
Southwest
Deal found 6/3![Southwest logo]()
$472
Last-minute flights from Islip to San AntonioDiscover last-minute flight deals from Islip to San Antonio. Data last updated juin 6, 2026 and is based on user searches.
Discover last-minute flight deals from Islip to San Antonio. Data last updated juin 6, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 6/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 6/119:52 pm
ISP
- SAT
1 stop18h 45m
Frontier
lun. 6/154:22 pm
SAT
- ISP
1 stop22h 34m
Frontier
Deal found 6/5![Frontier logo]()
$484
This Booking.com deal was found by Cheapflights users on 6/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 7/310:48 am
ISP
- SAT
1 stop29h 39m
Frontier
ven. 7/109:51 am
SAT
- ISP
1 stop23h 02m
Frontier
Deal found 6/5![Frontier logo]()
$363
This Southwest deal was found by Cheapflights users on 6/3. 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.
ven. 7/36:00 am
ISP
- SAT
1 stop6h 50m
Southwest
jeu. 7/93:45 pm
SAT
- ISP
1 stop6h 55m
Southwest
Deal found 6/3![Southwest logo]()
$467
This Southwest deal was found by Cheapflights users on 6/2. 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.
mar. 7/146:00 am
ISP
- SAT
1 stop5h 45m
Southwest
mar. 7/215:15 am
SAT
- ISP
1 stop5h 35m
Southwest
Deal found 6/2![Southwest logo]()
$395
This Southwest deal was found by Cheapflights users on 6/5. 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.
jeu. 7/305:50 pm
ISP
- SAT
1 stop6h 35m
Southwest
mar. 8/112:35 pm
SAT
- ISP
1 stop5h 30m
Southwest
Deal found 6/5![Southwest logo]()
$431
One-way flights from Islip to San AntonioSearch for one-way flight options from Islip to San Antonio. Find affordable one-way fares based on user searches. Data last updated juin 6, 2026.
Search for one-way flight options from Islip to San Antonio. Find affordable one-way fares based on user searches. Data last updated juin 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 6/259:52 pm
ISP
- SAT
1 stop18h 45m
Frontier
Deal found 6/2![Frontier logo]()
$225
This Southwest deal was found by Cheapflights users on 6/1. 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.
dim. 8/236:20 am
ISP
- SAT
1 stop7h 20m
Southwest
Deal found 6/1![Southwest logo]()
$234
This Booking.com deal was found by Cheapflights users on 6/5. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 6/129:52 pm
ISP
- SAT
1 stop18h 45m
Frontier
Deal found 6/5![Frontier logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
sam. 6/1311:57 am
ISP
- SAT
1 stop22h 18m
Breeze Airways
Deal found 6/4![Breeze Airways logo]()
$257
This Southwest deal was found by Cheapflights users on 6/4. 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.
ven. 6/195:50 pm
ISP
- SAT
1 stop6h 30m
Southwest
Deal found 6/4![Southwest logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
ven. 6/199:52 pm
ISP
- SAT
2 stops22h 04m
Frontier
Deal found 6/4![Frontier logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 6/259:52 pm
ISP
- SAT
3 stops43h 21m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$315
This KAYAK deal was found by Cheapflights users on 6/4. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 8/1211:57 am
ISP
- SAT
1 stop22h 18m
Breeze Airways
Deal found 6/4![Breeze Airways logo]()
$340
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
lun. 6/152:28 pm
ISP
- SAT
3 stops54h 43m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$348
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
lun. 6/159:52 pm
ISP
- SAT
2 stops46h 04m
Frontier
Deal found 6/4![Frontier logo]()
$379
Find flight deals from Islip to San Antonio
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to San Antonio (SAT). 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 juin 6, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $363 (Booking.com) |
One-way from | $225 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $458 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip to San Antonio 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 juin 6, 2026.
Use the filters below to find and compare flights from Islip to San Antonio that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
mar. 7/14
6:00 am-10:45 am
1 stop5h 45m
San Antonio
mar. 7/21
5:15 am-11:50 am
1 stop5h 35m
$395
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
lun. 8/10
6:45 am-12:00 pm
1 stop6h 15m
San Antonio
lun. 8/17
2:55 pm-10:05 pm
1 stop6h 10m
$425
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
jeu. 7/30
3:05 pm-10:55 pm
2 stops8h 50m
San Antonio
mar. 8/11
10:50 am-9:05 pm
2 stops9h 15m
$441
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
jeu. 10/15
10:20 am-5:15 pm
1 stop7h 55m
San Antonio
dim. 10/18
4:25 pm-11:35 pm
1 stop6h 10m
$446
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
jeu. 7/30
6:00 am-11:50 am
1 stop6h 50m
San Antonio
jeu. 7/30
3:45 pm-11:40 pm
1 stop6h 55m
$467
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
ven. 7/3
5:50 pm-11:20 pm
1 stop6h 30m
San Antonio
jeu. 7/9
3:45 pm-11:40 pm
2 stops6h 55m
$472
Cheapest one-way
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
jeu. 6/25
9:52 pm-3:37 pm
1 stop18h 45m
$225
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
dim. 8/23
6:20 am-12:40 pm
1 stop7h 20m
$234
Quickest one-way
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
ven. 6/19
5:50 pm-11:20 pm
1 stop6h 30m
$294
IslipSan Antonio
ISP - SAT
ISPSAT
Islip Long Island
ven. 6/19
9:52 pm-6:56 pm
2 stops22h 04m
$296
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from Islip to San Antonio
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Islip to San Antonio in June.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Islip, New York-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Islip, New York-San Antonio flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Islip, New York-San Antonio flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Islip, New York-San Antonio 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 Islip, New York-San Antonio 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 Islip to San Antonio
Have a flexible travel schedule? Discover the best time to fly to San Antonio from Islip with our price prediction graph.
ISP-SAT
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 San Antonio
Get insights into the airlines that provide service to San Antonio. 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 San Antonio. Reviews last updated juin 6, 2026.
Read through reviews of airlines operating flights from Islip to San Antonio, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from Islip to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
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Islip and San Antonio flights
Browse other Islip and San Antonio flight options. Last updated on juin 6, 2026.
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Top airline flying from Islip to San Antonio
Discover the top airline that operate flights from Islip to San Antonio. 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 juin 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$300 | Average$402 | FlexibilityNo cancel fee | On-time63% |