ISP - SAT

$279 Find Cheap Flights from Islip to San Antonio

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to San Antonio departing on 12/2. 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 San Antonio

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

Cheapest round-trip
$279
Multiple Airlines
Wed 1/28Sat 1/31
ISP - SAT • 2 stops
Cheapest one-way
$146
Frontier
Tue 12/2
ISP - SAT • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Antonio!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to San Antonio 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 Islip to San Antonio

Wed, Jan 28 - Sat, Jan 31
Multiple Airlines Logo
11:50 am - 11:52 pmISP-SAT
13h 02m2 stops
Multiple Airlines Logo
6:30 am - 8:40 amSAT-ISP
25h 10m1 stop
$279Multiple Airlines
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Tue, Dec 23 - Tue, Dec 30
Multiple Airlines Logo
12:20 pm - 6:16 pmISP-SAT
30h 56m1 stop
Multiple Airlines Logo
12:45 pm - 4:37 pmSAT-ISP
26h 52m1 stop
$309Multiple Airlines
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Tue, Dec 23 - Tue, Dec 30
Multiple Airlines Logo
12:20 pm - 11:26 pmISP-SAT
36h 06m2 stops
Multiple Airlines Logo
12:45 pm - 4:37 pmSAT-ISP
26h 52m1 stop
$333Multiple Airlines
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Wed, Jan 28 - Sat, Jan 31
Southwest Logo
3:45 pm - 9:10 pmISP-SAT
6h 25m1 stop
Southwest Logo
5:20 am - 11:45 amSAT-ISP
5h 25m1 stop
$380Southwest
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Wed, Jan 28 - Sat, Jan 31
Southwest Logo
9:15 am - 7:05 pmISP-SAT
10h 50m2 stops
Southwest Logo
1:10 pm - 9:50 pmSAT-ISP
7h 40m2 stops
$390Southwest
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Tue, Dec 30 - Sat, Jan 3
Multiple Airlines Logo
2:19 pm - 11:50 amISP-SAT
22h 31m2 stops
Multiple Airlines Logo
12:45 pm - 7:39 pmSAT-ISP
29h 54m1 stop
$409Multiple Airlines
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Mon, Feb 16 - Thu, Feb 19
Southwest Logo
1:10 pm - 11:35 pmISP-SAT
11h 25m2 stops
Southwest Logo
5:50 am - 4:25 pmSAT-ISP
9h 35m2 stops
$452Southwest
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Mon, Feb 16 - Thu, Feb 19
Southwest Logo
1:10 pm - 10:50 pmISP-SAT
10h 40m1 stop
Southwest Logo
5:50 am - 4:25 pmSAT-ISP
9h 35m2 stops
$453Southwest
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Mon, Feb 16 - Thu, Feb 19
Multiple Airlines Logo
9:27 am - 11:53 pmISP-SAT
15h 26m2 stops
Multiple Airlines Logo
10:26 am - 8:42 amSAT-ISP
21h 16m3 stops
$467Multiple Airlines
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Tue, Dec 30 - Sat, Jan 3
Multiple Airlines Logo
12:20 pm - 11:50 amISP-SAT
24h 30m1 stop
Multiple Airlines Logo
12:45 pm - 7:39 pmSAT-ISP
29h 54m1 stop
$481Multiple Airlines
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Booking Insights

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

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

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

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

There is just one airline that flies from Islip to San Antonio direct and that is Southwest. The best round-trip deal found from Southwest for the route is $350.

Find deals

Good to know

Cheapest flight$146
Flight from Islip to San Antonio

When to book flights from Islip to San Antonio

Are your dates flexible? Find out the best times to travel from Islip to San Antonio 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 Islip to San Antonio

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

    In the last 3 days, the lowest price for a flight from Islip to San Antonio was $146 for a one-way ticket and $279 for a round-trip.

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

    A passport is not required to fly from Islip to San Antonio.

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

    Islip airport is called Islip Long Island and the only airport in San Antonio is San Antonio.

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

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

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

    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 Islip to San Antonio.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Antonio from Islip 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 Islip to San Antonio?

    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 San Antonio with an airline and back to Islip with another airline. Booking your flights between Islip and SAT 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 Islip to San Antonio?

    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 San Antonio from Islip 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 Islip to San Antonio

 
See real verified KAYAK customer reviews for airlines flying from Islip to San Antonio. 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 Islip to San Antonio? 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 4254 reviews
8.6Crew
8.0Comfort
7.0Food
7.5Entertainment
8.1Boarding
Airline reviews

No delays and arrived to destination 30 min early. Staff was super friendly.

10.0 ExcellentIlevba, Nov 2025DCA - DAL
Read more Southwest reviews

No delays and arrived to destination 30 min early. Staff was super friendly.

Everything a cheap airline should be at normal airline rates.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

It was one and half hour late... Not sure if any other experience matters.

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

It was 2 hours 45 minutes late, for no apparently clear reason.

The movies using Southwest WiFi kept pausing and I had to restart multiple times.

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

Information on your arrival and departure airports

Islip (ISP)
San Antonio (SAT)