When did momondo last update prices for flights from San Antonio Airport to Islip Long Island Airport?

Prices for flights from San Antonio Airport to Islip Long Island Airport refresh daily.

How many operators does momondo search for flights from San Antonio Airport to Islip Long Island Airport?

The number of operators available for flights from San Antonio Airport to Islip Long Island Airport is 1 as of January 2026.

How old do you have to be to fly from San Antonio Airport to Islip Long Island Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Islip Long Island Airport.

What documentation or ID do you need to fly to Islip Long Island Airport?

The necessary travel and health documents for your Islip Long Island Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$430 Cheap Flights from San Antonio to Islip in 2026

1 adult

0 bags

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Find the cheapest flights from San Antonio to New York

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:45 am - 11:55 am

SAT

ISP

5h 10m

1 stop

5:45 am - 12:50 pm

ISP

SAT

8h 05m

1 stop

$430Southwest

Wed, Feb 11 - Wed, Mar 11

1:45 pm - 9:55 pm

SAT

ISP

7h 10m

2 stops

4:40 pm - 10:30 pm

ISP

SAT

6h 50m

1 stop

$435Southwest

Wed, Feb 11 - Wed, Mar 11

6:45 am - 4:15 pm

SAT

ISP

8h 30m

2 stops

6:10 am - 3:20 pm

ISP

SAT

10h 10m

2 stops

$441Southwest

Wed, Feb 11 - Wed, Mar 11

5:15 am - 11:45 am

SAT

ISP

5h 30m

1 stop

5:55 pm - 11:00 pm

ISP

SAT

6h 05m

1 stop

$447Southwest

Sun, Mar 8 - Thu, Mar 12

2:13 pm - 12:33 pm

SAT

ISP

21h 20m

1 stop

7:26 pm - 9:32 am

ISP

SAT

39h 06m

2 stops

$521Multiple Airlines

Sun, Mar 8 - Thu, Mar 12

2:30 pm - 11:50 pm

SAT

ISP

8h 20m

2 stops

6:00 am - 2:25 pm

ISP

SAT

9h 25m

2 stops

$632Southwest

Sun, Mar 8 - Thu, Mar 12

10:26 am - 5:46 pm

SAT

ISP

30h 20m

2 stops

5:08 pm - 12:27 pm

ISP

SAT

20h 19m

1 stop

$701Multiple Airlines

Sat, Mar 7 - Thu, Mar 12

8:53 pm - 3:23 pm

SAT

ISP

17h 30m

1 stop

5:08 pm - 12:27 pm

ISP

SAT

20h 19m

1 stop

$1,201Multiple Airlines

Sat, Mar 7 - Thu, Mar 12

Southwest flights from San Antonio to Islip, New York

Our best Southwest deals on San Antonio to Islip, New York flight tickets

Southwest

Feb 11

SAT5:45 amSan Antonio

5h 10m

1 stop

ISP11:55 amIslip Long Island

Mar 11

ISP5:45 amIslip Long Island

8h 05m

1 stop

SAT12:50 pmSan Antonio

$430

Southwest

Feb 11

SAT1:45 pmSan Antonio

7h 10m

2 stops

ISP9:55 pmIslip Long Island

Mar 11

ISP4:40 pmIslip Long Island

6h 50m

1 stop

SAT10:30 pmSan Antonio

$435

Southwest

Feb 11

SAT6:45 amSan Antonio

8h 30m

2 stops

ISP4:15 pmIslip Long Island

Mar 11

ISP6:10 amIslip Long Island

10h 10m

2 stops

SAT3:20 pmSan Antonio

$441

momondo Fare Finder

Use the filters below to find and compare flights from San Antonio to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Wed 2/11

5:45 am-11:55 am

1 stop5h 10m

Islip Long Island

Wed 3/11

5:45 am-12:50 pm

1 stop8h 05m

$430

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Wed 2/11

1:45 pm-9:55 pm

2 stops7h 10m

Islip Long Island

Wed 3/11

4:40 pm-10:30 pm

1 stop6h 50m

$435

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Wed 2/11

6:45 am-4:15 pm

2 stops8h 30m

Islip Long Island

Wed 3/11

6:10 am-3:20 pm

2 stops10h 10m

$441

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sun 3/8

5:15 am-11:45 am

1 stop5h 30m

Islip Long Island

Thu 3/12

5:55 pm-11:00 pm

1 stop6h 05m

$447

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sun 3/8

2:13 pm-12:33 pm

1 stop21h 20m

Islip Long Island

Thu 3/12

7:26 pm-9:32 am

2 stops39h 06m

$521

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sun 3/8

2:30 pm-11:50 pm

2 stops8h 20m

Islip Long Island

Thu 3/12

6:00 am-2:25 pm

2 stops9h 25m

$632

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sat 3/7

10:26 am-5:46 pm

2 stops30h 20m

Islip Long Island

Thu 3/12

5:08 pm-12:27 pm

1 stop20h 19m

$701

San AntonioIslip

SAT - ISP

SATISP

San Antonio

Sat 3/7

8:53 pm-3:23 pm

1 stop17h 30m

Islip Long Island

Thu 3/12

5:08 pm-12:27 pm

1 stop20h 19m

$1,201

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from San Antonio to Islip, New York

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What airlines fly to Islip, New York?

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Islip, New York from San Antonio according to our data. United Airlines is the first choice among our users, with 31% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 7 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

When to book flights from San Antonio to Islip, New York

Are you open to changing your travel dates? Check out the ideal times to fly from San Antonio to Islip, New York according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Antonio to Islip, New York (SAT to ISP) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to Islip, New York

Fastest flight time	5h 10m
Direct flights	None

The fastest flight from San Antonio to Islip, New York takes 5h 10m

There are no direct flights from San Antonio to Islip, New York. There are no popular flight routes from San Antonio to Islip, New York.

Search flight deals

How far is San Antonio to Islip Long Island by plane?
The distance between San Antonio and Islip Long Island is about 1619.5 mi. A reasonable flight in good conditions will take 5h 10m.
When did momondo last update prices for flights from San Antonio Airport to Islip Long Island Airport?
Prices for flights from San Antonio Airport to Islip Long Island Airport refresh daily.
How many operators does momondo search for flights from San Antonio Airport to Islip Long Island Airport?
The number of operators available for flights from San Antonio Airport to Islip Long Island Airport is 1 as of January 2026.
How old do you have to be to fly from San Antonio Airport to Islip Long Island Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to Islip Long Island Airport.
What documentation or ID do you need to fly to Islip Long Island Airport?
The necessary travel and health documents for your Islip Long Island Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from San Antonio to Islip, New York?
Based on momondo bookings for flights between San Antonio and Islip, New York, the leading airline is Southwest, making up 100% of the total bookings.

Best airlines flying from San Antonio to Islip, New York

Compare and see reviews for airlines that fly from San Antonio to Islip, New York with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $309	Free Cancellation	Rating 8.0 4,267 reviews		Search Southwest flights

Montauk

Riverhead

Sag Harbor

Southampton

Amagansett

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to Islip?

It is quick and easy to find San Antonio to Islip flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Islip that suits you.

Can I find flights from San Antonio to Islip with flexible booking policies on momondo?

Yes. All flights to Islip from San Antonio on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from San Antonio to Islip?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Islip from San Antonio.

I’m not ready to book a flight from San Antonio to Islip right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Antonio to Islip now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Islip and let you know when they change.