Which airports can I use when flying from Islip to San Antonio?

Flights from Islip to San Antonio usually depart from Islip Long Island (ISP) and arrive at San Antonio (SAT).

What cabin classes can I book on flights from Islip to San Antonio?

Only Economy Class is available on flights from Islip to San Antonio.

Which airports do connecting flights from Islip to San Antonio pass through?

Most connecting flights from Islip to San Antonio pass through Baltimore/Washington (BWI), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Can I save money by using flexible dates for flights from Islip to San Antonio?

Yes. Being flexible with your travel dates can save you up to 37% on the Islip to San Antonio route. Tuesday is the cheapest departure day at $313 round-trip on average, while Sunday is the most expensive at $496, a difference of $183. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

What popular places can I visit in San Antonio?

Some of the most popular sights in San Antonio are San Antonio River Walk, SeaWorld San Antonio and Alamodome. These are among the most viewed places in San Antonio on KAYAK.

How long is a flight from Islip to San Antonio?

A nonstop flight from Islip to San Antonio takes 0h 00m, covering 1,621 miles.

Do I need a passport to fly from Islip to San Antonio?

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Have flight prices from Islip to San Antonio changed much recently?

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $323 to $1,613. That means the highest observed fare was about 5x higher than the lowest one.

How are flight prices from Islip to San Antonio looking right now?

One-way fares from Islip to San Antonio are currently higher than usual. Average one-way flight prices are about $396, which is 35% above the typical average for this route.

What is the time difference between Islip and San Antonio?

San Antonio is 1 hour behind Islip (Central Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

What car rental options are available at San Antonio Airport (SAT)?

San Antonio Airport (SAT) hosts 5 major car rental companies, with daily rates starting from around $22 for economy cars. Top options include: • Europcar • Fox • Dollar • Hertz • Alamo

How much should I expect to pay for a Islip to San Antonio flight?

Round-trip flights from Islip to San Antonio range from $379 to $450, with an average of $444 over the past 12 months. Anything below $379 counts as a good deal.

What is the cheapest airline to fly from Islip to San Antonio?

Southwest ($323) and Breeze Airways ($665) are the cheapest airlines to fly round-trip from Islip to San Antonio according to KAYAK data over the last 5 days.

What is the cheapest layover airport when flying from Islip to San Antonio?

Flights via Baltimore/Washington (BWI) offer the most affordable fares, with an average round-trip price of $419. Based on KAYAK data over the past 3 months.

When flying from Islip to San Antonio which airport offers the shortest layover?

Baltimore/Washington (BWI) had the shortest average connection time for Islip to San Antonio layovers at 242 minutes over the past 3 months.

$209 CHEAP FLIGHTS from Islip to San Antonio (ISP - SAT)

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Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheapest round-trip

$323

Typical prices: $379-$450

Southwest

Mon 12/3Sat 12/8

ISP - SAT • 1 stop

Cheapest one-way

$209

Typical prices: $181-$584

Breeze Airways

Wed 2/21

ISP - SAT • 2 stops

Nonstop flights

Not available

There are currently no direct flights between Islip and San Antonio. You'll need to take a connecting flight to reach the destination.

Insights

When to travel

December

Cheapest • 30% price drop

November

Most popular

Good to know

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We hope you love your trip to San Antonio!

Flight Deals

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

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Recent round-trip flight deals from Islip to San Antonio

Thu, Dec 3 - Tue, Dec 8

4:05 pm - 9:25 pmISP Islip Long Island-SAT San Antonio

6h 20m1 stop Baltimore/Washington

2:45 pm - 9:40 pmSAT San Antonio-ISP Islip Long Island

5h 55m1 stop Baltimore/Washington

$323Southwest

Thu, Dec 3 - Tue, Dec 8

4:05 pm - 9:25 pmISP Islip Long Island-SAT San Antonio

6h 20m1 stop Baltimore/Washington

6:45 am - 4:15 pmSAT San Antonio-ISP Islip Long Island

8h 30m2 stops Dallas Love Field Baltimore/Washington

$328Southwest

Thu, Oct 15 - Wed, Oct 21

11:00 am - 4:30 pmISP Islip Long Island-SAT San Antonio

6h 30m1 stop Baltimore/Washington

5:15 am - 12:10 pmSAT San Antonio-ISP Islip Long Island

5h 55m1 stop Baltimore/Washington

$390Southwest

Thu, Oct 15 - Wed, Oct 21

11:00 am - 4:30 pmISP Islip Long Island-SAT San Antonio

6h 30m1 stop Baltimore/Washington

5:50 am - 3:45 pmSAT San Antonio-ISP Islip Long Island

8h 55m2 stops Dallas Love Field Baltimore/Washington

$395Southwest

Thu, Dec 3 - Tue, Dec 8

12:30 pm - 8:40 pmISP Islip Long Island-SAT San Antonio

9h 10m2 stops Baltimore/Washington Dallas Love Field

12:20 pm - 9:40 pmSAT San Antonio-ISP Islip Long Island

8h 20m2 stops Tampa Baltimore/Washington

$400Southwest

Thu, Oct 15 - Wed, Oct 21

11:00 am - 6:05 pmISP Islip Long Island-SAT San Antonio

8h 05m2 stops Baltimore/Washington Atlanta Hartsfield-Jackson

5:50 am - 3:45 pmSAT San Antonio-ISP Islip Long Island

8h 55m2 stops Dallas Love Field Baltimore/Washington

$422Southwest

Wed, Oct 7 - Sat, Oct 10

4:20 pm - 9:15 pmISP Islip Long Island-SAT San Antonio

5h 55m1 stop Baltimore/Washington

2:40 pm - 9:50 pmSAT San Antonio-ISP Islip Long Island

6h 10m1 stop Baltimore/Washington

$465Southwest

Wed, Oct 7 - Sat, Oct 10

4:20 pm - 9:15 pmISP Islip Long Island-SAT San Antonio

5h 55m1 stop Baltimore/Washington

12:45 pm - 9:50 pmSAT San Antonio-ISP Islip Long Island

8h 05m2 stops Chicago Midway Baltimore/Washington

$471Southwest

Thu, Oct 1 - Mon, Oct 5

10:57 am - 11:58 amISP Islip Long Island-SAT San Antonio

26h 01m2 stops Raleigh-Durham Memphis

10:05 am - 4:58 pmSAT San Antonio-ISP Islip Long Island

29h 53m1 stop Orlando

$481Multiple Airlines

Wed, Oct 14 - Mon, Oct 19

12:00 pm - 8:45 amISP Islip Long Island-SAT San Antonio

21h 45m1 stop Raleigh-Durham

12:38 pm - 11:20 amSAT San Antonio-ISP Islip Long Island

21h 42m2 stops Memphis Raleigh-Durham

$665Breeze Airways

Booking Insights

Price, demand and travel trends for Islip to San Antonio flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Islip to San Antonio with more confidence.

Prices

Airlines

Layovers

How much is a round-trip flight from Islip to San Antonio?

Round-trip flights from Islip to San Antonio start at $323. Prices are below average for this route right now, with typical round-trip fares ranging from $379 to $450. The lowest price found in the past 5 days was $323 on Southwest.

Find deals

Low season	January
High season	November
Cheapest flight	$209

Most popular time to fly with an average 11% increase in price.

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.

Which airports can I use when flying from Islip to San Antonio?
Flights from Islip to San Antonio usually depart from Islip Long Island (ISP) and arrive at San Antonio (SAT).
What cabin classes can I book on flights from Islip to San Antonio?
Only Economy Class is available on flights from Islip to San Antonio.
Which airports do connecting flights from Islip to San Antonio pass through?
Most connecting flights from Islip to San Antonio pass through Baltimore/Washington (BWI), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.
Can I save money by using flexible dates for flights from Islip to San Antonio?
Yes. Being flexible with your travel dates can save you up to 37% on the Islip to San Antonio route. Tuesday is the cheapest departure day at $313 round-trip on average, while Sunday is the most expensive at $496, a difference of $183. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.
What popular places can I visit in San Antonio?
Some of the most popular sights in San Antonio are San Antonio River Walk, SeaWorld San Antonio and Alamodome. These are among the most viewed places in San Antonio on KAYAK.
How long is a flight from Islip to San Antonio?
A nonstop flight from Islip to San Antonio takes 0h 00m, covering 1,621 miles.
Do I need a passport to fly from Islip to San Antonio?
No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.
Have flight prices from Islip to San Antonio changed much recently?
Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $323 to $1,613. That means the highest observed fare was about 5x higher than the lowest one.
How are flight prices from Islip to San Antonio looking right now?
One-way fares from Islip to San Antonio are currently higher than usual. Average one-way flight prices are about $396, which is 35% above the typical average for this route.
What is the time difference between Islip and San Antonio?
San Antonio is 1 hour behind Islip (Central Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.
What car rental options are available at San Antonio Airport (SAT)?
San Antonio Airport (SAT) hosts 5 major car rental companies, with daily rates starting from around $22 for economy cars. Top options include:
• Europcar
• Fox
• Dollar
• Hertz
• Alamo
How much should I expect to pay for a Islip to San Antonio flight?
Round-trip flights from Islip to San Antonio range from $379 to $450, with an average of $444 over the past 12 months. Anything below $379 counts as a good deal.

If your dates can be flexible, aim for a Tuesday departure instead of Sunday. On this route, Tuesday flights average $313 - about $183 less than Sunday (37% savings) based on the last 12 months.
If you can choose when to travel, plan your Islip to San Antonio trip for December. Fares historically average $313 round-trip in that month - typically $179 less than the most expensive month, which is November (based on the last 12 months).
If you're arriving late at night and need somewhere to stay, check out these hotels close to San Antonio Airport.
- Wyndham Garden San Antonio Airport
- La Quinta Inn & Suites by Wyndham San Antonio Airport
- Crowne Plaza San Antonio Airport By IHG

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ISP - SAT

$209 Find Cheap Flights from Islip to San Antonio - Compare and Save

Everything you should know

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

Recent round-trip flight deals from Islip to San Antonio

Recent one-way flight deals from Islip to San Antonio

Price, demand and travel trends for Islip to San Antonio flights

How much is a round-trip flight from Islip to San Antonio?

What is the cheapest airline to fly from Islip to San Antonio?

What is the cheapest layover airport when flying from Islip to San Antonio?

When flying from Islip to San Antonio which airport offers the shortest layover?

Key details for Islip to San Antonio flights

Low season

High season

Cheapest flight

When to book flights from Islip to San Antonio

Your Islip to San Antonio flight questions, answered

Your guide to booking Islip to San Antonio flights

More options for your flight from Islip to San Antonio

Complete your trip to San Antonio with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights from Islip to San Antonio

Find direct flights to and from Islip and San Antonio

Flights from domestic origins to San Antonio

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