SAT - ISP

$95 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 5/16. 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

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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Flights Deals

Cheap Flights from San Antonio to Islip

 
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.

Recent round-trip flight deals from San Antonio to Islip

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Antonio to Islip.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
8:31 pm - 10:41 amSAT-ISP
13h 10m1 stop
Frontier Logo
8:21 pm - 8:05 amISP-SAT
12h 44m1 stop
$281Frontier
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Fri, May 16 - Sun, Jun 22
Southwest Logo
5:05 am - 11:45 amSAT-ISP
5h 40m1 stop
Southwest Logo
6:00 am - 10:55 amISP-SAT
5h 55m1 stop
$417Southwest
Find Deal
Sun, Aug 3 - Fri, Aug 8
Southwest Logo
4:15 pm - 11:05 pmSAT-ISP
5h 50m1 stop
Southwest Logo
6:00 am - 10:55 amISP-SAT
5h 55m1 stop
$420Southwest
Find Deal
Mon, May 19 - Tue, Jun 24
Southwest Logo
12:45 pm - 11:55 pmSAT-ISP
10h 10m2 stops
Southwest Logo
6:00 am - 10:55 amISP-SAT
5h 55m1 stop
$422Southwest
Find Deal
Sun, Aug 3 - Fri, Aug 8
Southwest Logo
10:40 am - 8:20 pmSAT-ISP
8h 40m2 stops
Southwest Logo
4:40 pm - 11:00 pmISP-SAT
7h 20m1 stop
$425Southwest
Find Deal
Mon, May 19 - Tue, Jun 24
Southwest Logo
12:45 pm - 11:55 pmSAT-ISP
10h 10m2 stops
Southwest Logo
6:00 am - 12:15 pmISP-SAT
7h 15m2 stops
$427Southwest
Find Deal
Sun, Aug 3 - Fri, Aug 8
Southwest Logo
10:40 am - 8:20 pmSAT-ISP
8h 40m2 stops
Southwest Logo
1:40 pm - 8:15 pmISP-SAT
7h 35m2 stops
$457Southwest
Find Deal
Mon, May 19 - Tue, Jun 24
Useful Info

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 provide the cheapest flights from San Antonio to Islip?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from San Antonio to Islip were found on Frontier ($281) and Southwest ($417).

Find deals

Good to know

Cheapest flight$95
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 $95 for a one-way ticket and $281 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.

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 4294 reviews
8.2Boarding
8.6Crew
7.1Food
7.6Entertainment
8.0Comfort
Airline reviews

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

8.0 ExcellentJonathan, Apr 2025AUS - MSY
Read more Southwest reviews

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.

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

The last 30 min or so, they put the heat on full. We thought we were being basted.

The fluidity of the entire process of boarding the plane the flight attendants attentiveness. The flight attendants also provided coloring books for my kids who loved it.

The plane wasn’t full, so we got the best seats

It good. Just not that plane didn’t have power outlets to charge devices etc.

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

Information on your arrival and departure airports

Islip (ISP)
San Antonio (SAT)

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