$420+ 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 11/19. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — ISP
Nov 12 — Nov 191
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 October 13, 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 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 10/9. 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 10/248:21 pm -
2 stops20h 09m
Wed 10/2812:00 pm -
1 stop21h 45m
Deal found 10/9![Multiple Airlines logo]()
$595
This Southwest deal was found by Cheapflights users on 10/9. 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 10/242:40 pm -
1 stop6h 10m
Wed 10/284:20 pm -
1 stop5h 55m
Deal found 10/9![Southwest logo]()
$617
This Southwest deal was found by Cheapflights users on 10/10. 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 11/212:35 pm -
2 stops8h 10m
Fri 11/274:25 pm -
1 stop8h 30m
Deal found 10/10![Southwest logo]()
$673
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Sun 10/189:25 am -
1 stop27h 57m
Tue 10/2012:00 pm -
2 stops22h 08m
Deal found 10/13![Multiple Airlines logo]()
$912
This Southwest deal was found by Cheapflights users on 10/13. 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.
Sun 10/185:15 pm -
1 stop5h 25m
Tue 10/204:20 pm -
1 stop5h 55m
Deal found 10/13![Southwest logo]()
$1,102
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 13, 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 13, 2026.
This Southwest deal was found by Cheapflights users on 10/9. 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 10/242:40 pm -
1 stop6h 10m
Wed 10/284:20 pm -
1 stop5h 55m
Deal found 10/9![Southwest logo]()
$617
This Southwest deal was found by Cheapflights users on 10/10. 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 11/212:35 pm -
2 stops8h 10m
Fri 11/274:25 pm -
1 stop8h 30m
Deal found 10/10![Southwest logo]()
$673
Last-minute flights from San Antonio to IslipDiscover last-minute flight deals from San Antonio to Islip. Data last updated October 13, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Islip. Data last updated October 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/13. 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.
Sun 10/189:25 am -
1 stop27h 57m
Tue 10/2012:00 pm -
2 stops22h 08m
Deal found 10/13![Multiple Airlines logo]()
$912
This Southwest deal was found by Cheapflights users on 10/13. 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.
Sun 10/185:15 pm -
1 stop5h 25m
Tue 10/204:20 pm -
1 stop5h 55m
Deal found 10/13![Southwest logo]()
$1,102
This Kiwi.com deal was found by Cheapflights users on 10/9. 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 10/248:21 pm -
2 stops20h 09m
Wed 10/2812:00 pm -
1 stop21h 45m
Deal found 10/9![Multiple Airlines logo]()
$595
This Southwest deal was found by Cheapflights users on 10/9. 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 10/242:40 pm -
1 stop6h 10m
Wed 10/284:20 pm -
1 stop5h 55m
Deal found 10/9![Southwest logo]()
$617
This Southwest deal was found by Cheapflights users on 10/10. 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 11/212:35 pm -
2 stops8h 10m
Fri 11/274:25 pm -
1 stop8h 30m
Deal found 10/10![Southwest logo]()
$673
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 13, 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 13, 2026.
This KAYAK deal was found by Cheapflights users on 10/13. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/199:25 am -
1 stop27h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/13![Breeze Airways logo]()
$420
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 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $595 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $428 |
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 13, 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
Thu 11/19
9:25 am-2:22 pm
1 stop27h 57m
Islip Long Island
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$420
Quickest round-trip
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 10/24
2:40 pm-9:50 pm
1 stop6h 10m
Islip Long Island
Wed 10/28
4:20 pm-9:15 pm
1 stop5h 55m
$617
San AntonioIslip
SAT San Antonio - ISP Islip Long Island
SATISP
San Antonio
Sat 11/21
2:35 pm-11:45 pm
2 stops8h 10m
Islip Long Island
Fri 11/27
4:25 pm-11:55 pm
1 stop8h 30m
$673
Sorted 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 13, 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
Overall
7.9
Food
7.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Boarding
8.1
Overall
7.9
Food
7.0
Comfort
8.0
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
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 October 13, 2026.
San Antonio and Islip flights
Browse other San Antonio and Islip flight options. Last updated on October 13, 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 October 13, 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 7,457,451 searches. Data last updated October 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$368 | Average$574 | FlexibilityNo cancel fee | On-time63% |