$149+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Aug 8 — Aug 151
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San Antonio to Islip 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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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 San Antonio to Islip
Cheapest
Best
Last-minute
One-way
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 July 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 July 9, 2026.
This Southwest deal was found by Cheapflights users on 7/8. 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 9/87:55 am
SAT
- ISP
1 stop6h 00m
Southwest
Mon 9/144:05 pm
ISP
- SAT
1 stop6h 25m
Southwest
Deal found 7/8![Southwest logo]()
$282
This Southwest deal was found by Cheapflights users on 7/8. 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.
Thu 7/305:10 am
SAT
- ISP
1 stop5h 40m
Southwest
Thu 8/66:10 am
ISP
- SAT
1 stop7h 15m
Southwest
Deal found 7/8![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:10 am
SAT
- ISP
1 stop8h 20m
Southwest
Sun 8/96:20 am
ISP
- SAT
2 stops9h 15m
Southwest
Deal found 7/7![Southwest logo]()
$559
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2010:45 am
SAT
- ISP
1 stop5h 30m
Southwest
Sun 12/275:55 pm
ISP
- SAT
1 stop8h 00m
Southwest
Deal found 7/7![Southwest logo]()
$567
This KAYAK deal was found by Cheapflights users on 7/6. 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 8/311:30 am
SAT
- ISP
2 stops25h 12m
Breeze Airways
Wed 8/511:57 am
ISP
- SAT
1 stop22h 18m
Breeze Airways
Deal found 7/6![Breeze Airways logo]()
$664
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 July 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 July 9, 2026.
This Southwest deal was found by Cheapflights users on 7/8. 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 9/87:55 am
SAT
- ISP
1 stop6h 00m
Southwest
Mon 9/146:10 am
ISP
- SAT
2 stops9h 05m
Southwest
Deal found 7/8![Southwest logo]()
$288
This KAYAK deal was found by Cheapflights users on 7/6. 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 8/311:30 am
SAT
- ISP
2 stops25h 12m
Breeze Airways
Wed 8/511:57 am
ISP
- SAT
1 stop22h 18m
Breeze Airways
Deal found 7/6![Breeze Airways logo]()
$664
This Southwest deal was found by Cheapflights users on 7/8. 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.
Thu 7/305:10 am
SAT
- ISP
1 stop5h 40m
Southwest
Thu 8/66:10 am
ISP
- SAT
1 stop7h 15m
Southwest
Deal found 7/8![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:10 am
SAT
- ISP
1 stop8h 20m
Southwest
Sun 8/96:20 am
ISP
- SAT
2 stops9h 15m
Southwest
Deal found 7/7![Southwest logo]()
$559
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/206:00 am
SAT
- ISP
2 stops9h 20m
Southwest
Sun 12/275:55 pm
ISP
- SAT
1 stop8h 00m
Southwest
Deal found 7/7![Southwest logo]()
$572
Last-minute flights from San Antonio to IslipDiscover last-minute flight deals from San Antonio to Islip. Data last updated July 9, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Islip. Data last updated July 9, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/8. 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.
Sat 7/119:32 pm
SAT
- ISP
2 stops35h 21m
Multiple Airlines
Wed 7/1511:57 am
ISP
- SAT
1 stop22h 18m
Multiple Airlines
Deal found 7/8![Multiple Airlines logo]()
$761
This KAYAK deal was found by Cheapflights users on 7/8. 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.
Mon 7/1311:30 am
SAT
- ISP
2 stops28h 17m
Breeze Airways
Wed 7/1511:57 am
ISP
- SAT
1 stop22h 18m
Breeze Airways
Deal found 7/8![Breeze Airways logo]()
$834
This Southwest deal was found by Cheapflights users on 7/5. 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 7/165:10 am
SAT
- ISP
1 stop5h 40m
Southwest
Wed 7/222:55 pm
ISP
- SAT
1 stop7h 45m
Southwest
Deal found 7/5![Southwest logo]()
$832
This Southwest deal was found by Cheapflights users on 7/8. 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.
Thu 7/305:10 am
SAT
- ISP
1 stop5h 40m
Southwest
Thu 8/66:10 am
ISP
- SAT
1 stop7h 15m
Southwest
Deal found 7/8![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 7/7. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:10 am
SAT
- ISP
1 stop8h 20m
Southwest
Sun 8/96:20 am
ISP
- SAT
2 stops9h 15m
Southwest
Deal found 7/7![Southwest logo]()
$559
This KAYAK deal was found by Cheapflights users on 7/6. 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 8/311:30 am
SAT
- ISP
2 stops25h 12m
Breeze Airways
Wed 8/511:57 am
ISP
- SAT
1 stop22h 18m
Breeze Airways
Deal found 7/6![Breeze Airways logo]()
$664
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 July 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 July 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/179:25 am
SAT
- ISP
1 stop24h 47m
Breeze Airways
Deal found 7/7![Breeze Airways logo]()
$149
This Priceline deal was found by Cheapflights users on 7/7. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/219:51 am
SAT
- ISP
1 stop7h 23m
Frontier
Deal found 7/7![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:26 pm
SAT
- ISP
2 stops12h 27m
Frontier
Deal found 7/7![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:30 am
SAT
- ISP
2 stops28h 17m
Breeze Airways
Deal found 7/7![Breeze Airways logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:26 pm
SAT
- ISP
2 stops20h 48m
Frontier
Deal found 7/7![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2111:30 am
SAT
- ISP
3 stops21h 23m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/194:53 pm
SAT
- ISP
3 stops24h 13m
Breeze Airways
Deal found 7/7![Breeze Airways logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/209:55 am
SAT
- ISP
2 stops46h 58m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:26 pm
SAT
- ISP
3 stops16h 07m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/254:53 pm
SAT
- ISP
3 stops24h 13m
Breeze Airways
Deal found 7/7![Breeze Airways logo]()
$226
This Kiwi.com deal was found by Cheapflights users on 7/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/225:38 pm
SAT
- ISP
2 stops39h 15m
Multiple Airlines
Deal found 7/7![Multiple Airlines logo]()
$230
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 July 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $282 (Southwest) |
One-way from | $149 (Kiwi.com) |
Popular in | July |
Cheapest in | September |
Average price | $421 |
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 July 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
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Tue 9/8
7:55 am-2:55 pm
1 stop6h 00m
Islip Long Island
Mon 9/14
6:10 am-2:15 pm
2 stops9h 05m
$288
Quickest round-trip
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Thu 7/30
5:10 am-11:50 am
1 stop5h 40m
Islip Long Island
Thu 8/6
6:10 am-12:25 pm
1 stop7h 15m
$441
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Mon 8/3
5:10 am-2:30 pm
1 stop8h 20m
Islip Long Island
Sun 8/9
6:20 am-2:35 pm
2 stops9h 15m
$559
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Sun 12/20
6:00 am-4:20 pm
2 stops9h 20m
Islip Long Island
Sun 12/27
5:55 pm-12:55 am
1 stop8h 00m
$572
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Mon 8/3
11:30 am-1:42 pm
2 stops25h 12m
Islip Long Island
Wed 8/5
11:57 am-9:15 am
1 stop22h 18m
$664
Cheapest one-way
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Mon 8/24
9:51 am-6:14 pm
1 stop7h 23m
$154
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Fri 8/21
2:05 pm-10:05 pm
2 stops7h 00m
$197
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Tue 8/18
8:26 pm-1:33 pm
3 stops16h 07m
$223
Quickest one-way
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Thu 8/20
2:55 pm-10:05 pm
1 stop6h 10m
$234
San AntonioIslip
SAT - ISP
SATISP
San Antonio
Thu 9/17
12:20 pm-10:05 pm
2 stops8h 45m
$239
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 July 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.
Entertainment
7.5
Overall
7.9
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
Reviews
1 / 20
6.0
GoodScott,Feb 2026
HOU - FLL
Entertainment
7.5
Overall
7.9
Boarding
8.1
Crew
8.6
Comfort
8.0
Food
7.0
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.
Traveling to a place near Islip?
Book flights to Islip if you plan to visit one of these locationsRiverhead
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Islip flight routes
Other flight options
Other flights from San Antonio
Popular flights
Alternative routes for San Antonio to Islip
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Islip by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Antonio to Islip by cabin class
Find flights from San Antonio to Islip, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Islip
Explore flights to Islip departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 9, 2026.
San Antonio and Islip flights
Browse other San Antonio and Islip flight options. Last updated on July 9, 2026.
Other flights from San Antonio
Browse through other flights departing from San Antonio. Flights are based on user searches made on Cheapflights and were last updated on July 9, 2026.
Popular flight searches
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 2,558,603 searches. Data last updated July 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$309 | Average$456 | FlexibilityNo cancel fee | On-time63% |