SAT - ISP

$180 Find Cheap Flights from San Antonio to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Antonio to Islip departing on 12/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to Islip, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to Islip, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$236
Multiple Airlines
Mon 12/22Fri 1/9
SAT - ISP • 1 stop
Cheapest one-way
$180
Southwest
Mon 12/22
SAT - ISP • 1 stop
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Antonio to Islip (SAT-ISP)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Antonio to Islip that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Antonio to Islip

Mon, Dec 22 - Fri, Jan 9
Multiple Airlines Logo
7:11 pm - 11:25 amSAT-ISP
15h 14m1 stop
Multiple Airlines Logo
3:34 pm - 10:27 pmISP-SAT
7h 53m1 stop
$236Multiple Airlines
Find Deal
Wed, Nov 12 - Sun, Nov 16
Multiple Airlines Logo
10:58 am - 5:42 pmSAT-ISP
29h 44m1 stop
Multiple Airlines Logo
8:49 am - 6:32 pmISP-SAT
34h 43m2 stops
$258Multiple Airlines
Find Deal
Wed, Nov 12 - Sun, Nov 16
Multiple Airlines Logo
10:58 am - 5:42 pmSAT-ISP
29h 44m1 stop
Multiple Airlines Logo
9:27 pm - 9:04 amISP-SAT
12h 37m1 stop
$269Multiple Airlines
Find Deal
Mon, Dec 22 - Fri, Jan 9
Multiple Airlines Logo
7:11 pm - 11:25 amSAT-ISP
15h 14m1 stop
Multiple Airlines Logo
8:45 pm - 3:11 pmISP-SAT
43h 26m2 stops
$301Multiple Airlines
Find Deal
Mon, Dec 22 - Fri, Jan 9
Southwest Logo
5:25 pm - 11:55 pmSAT-ISP
5h 30m1 stop
Southwest Logo
3:45 pm - 11:05 pmISP-SAT
8h 20m2 stops
$408Southwest
Find Deal
Mon, Dec 22 - Fri, Jan 9
Southwest Logo
2:45 pm - 11:55 pmSAT-ISP
8h 10m2 stops
Southwest Logo
3:45 pm - 11:05 pmISP-SAT
8h 20m2 stops
$423Southwest
Find Deal
Booking Insights

KAYAK's insights & trends for San Antonio to Islip flights

Get data-powered insights and trends into flights from San Antonio to Islip to help you find the cheapest flights, the best time to fly and much more.

Which airlines fly non-stop between San Antonio and Islip?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from San Antonio to Islip.

There is just one airline that flies from San Antonio to Islip direct and that is Southwest. The best round-trip deal found from Southwest for the route is $309.

Good to know

Cheapest flight$180
Flight from San Antonio to Islip

When to book flights from San Antonio to Islip

Are your dates flexible? Find out the best times to travel from San Antonio to Islip based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Antonio to Islip

  • What is the cheapest flight from San Antonio to Islip?

    In the last 3 days, the lowest price for a flight from San Antonio to Islip was $180 for a one-way ticket and $236 for a round-trip.

  • Do I need a passport to fly between San Antonio and Islip?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from San Antonio to Islip?

    On your way to Islip, you’ll fly out from San Antonio. You’ll be landing at Islip Long Island.

  • Which aircraft models fly most regularly from San Antonio to Islip?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from San Antonio to Islip?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Antonio to Islip.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Antonio to Islip?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Islip from San Antonio is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Antonio to Islip?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Islip with an airline and back to San Antonio with another airline. Booking your flights between San Antonio and ISP can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Antonio to Islip?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Islip from San Antonio up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from San Antonio to Islip

 
See real verified KAYAK customer reviews for airlines flying from San Antonio to Islip. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Antonio to Islip? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4241 reviews
8.0Comfort
7.5Entertainment
8.6Crew
8.1Boarding
7.0Food
Airline reviews

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

2.0 MediocreThomas, Oct 2025SAT - STL
Read more Southwest reviews

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

Plz don't take away free bags and free seating

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Everything you need to know for your flight from San Antonio to Islip

Information on your arrival and departure airports

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