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$124+ Cheap flights from Jacksonville to Islip (JAX - ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
JAX — ISP
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Jacksonville to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Jacksonville (JAX) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 16, 2025.

Round-trip from

$240
(Kiwi.com)

One-way from

$124
(CheapOair)

Popular in

January

Cheapest in

May

Average price

$417
From Jacksonville to Islip Long Island
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One-way flight from Jacksonville to Islip Long Island
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Highest demand for flights based on searches. 18% potential increase in price ($93 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Jacksonville to Islip

Cheapest flights from Jacksonville to Islip
Explore the most affordable flight options available from Jacksonville to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/252:47 pmJAX - ISP
1 stop4h 09mBreeze Airways
Sun 9/287:36 pmISP - JAX
1 stop13h 22mBreeze Airways
Deal found 9/14$240
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/302:15 pmJAX - ISP
1 stop4h 41mMultiple Airlines
Mon 11/32:25 pmISP - JAX
2 stops7h 28mMultiple Airlines
Deal found 9/14$260
This Frontier deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/305:13 pmJAX - ISP
2 stops15h 56mFrontier
Mon 11/39:54 amISP - JAX
2 stops11h 59mFrontier
Deal found 9/14$279
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/1411:25 amJAX - ISP
1 stop4h 40mSouthwest
Wed 11/512:55 pmISP - JAX
1 stop4h 40mSouthwest
Deal found 9/14$305
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/252:47 pmJAX - ISP
1 stop4h 09mMultiple Airlines
Mon 9/295:05 pmISP - JAX
2 stops45h 07mMultiple Airlines
Deal found 9/14$309
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:15 pmJAX - ISP
1 stop5h 30mSouthwest
Mon 11/35:40 amISP - JAX
1 stop4h 45mSouthwest
Deal found 9/14$313
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/315:15 pmJAX - ISP
1 stop3h 55mSouthwest
Tue 11/412:55 pmISP - JAX
1 stop7h 20mSouthwest
Deal found 9/14$326
This Southwest deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/146:25 amJAX - ISP
2 stops9h 40mSouthwest
Tue 11/45:40 amISP - JAX
2 stops9h 40mSouthwest
Deal found 9/14$388

Cheapflights Fare Finder

 
Customize your flight search to find flights from Jacksonville to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Jacksonville to Islip that are best for you.

Fly from

Jacksonville

Fly to

Islip

Route

Depart

Return

Price

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Thu 10/30

2:15 pm-6:56 pm

1 stop4h 41m

Islip Long Island

Mon 11/3

2:25 pm-9:53 pm

2 stops7h 28m

$260

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Thu 10/30

5:13 pm-9:09 am

2 stops15h 56m

Islip Long Island

Mon 11/3

9:54 am-9:53 pm

2 stops11h 59m

$279

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Tue 10/14

11:25 am-4:05 pm

1 stop4h 40m

Islip Long Island

Tue 11/4

12:55 pm-8:15 pm

1 stop7h 20m

$305

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Tue 10/14

11:25 am-4:05 pm

1 stop4h 40m

Islip Long Island

Wed 11/5

12:55 pm-5:35 pm

1 stop4h 40m

$305

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Thu 10/30

6:15 pm-11:45 pm

1 stop5h 30m

Islip Long Island

Mon 11/3

5:40 am-10:25 am

1 stop4h 45m

$313

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Fri 10/31

5:15 pm-9:10 pm

1 stop3h 55m

Islip Long Island

Tue 11/4

12:55 pm-8:15 pm

1 stop7h 20m

$326

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Tue 11/11

7:00 am-3:20 pm

1 stop8h 20m

$154

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Tue 11/25

7:45 pm-11:55 pm

1 stop4h 10m

$194

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Fri 11/21

2:34 pm-1:39 pm

3 stops47h 05m

$257

JacksonvilleIslip

JAX - ISP

JAXISP

Jacksonville

Sun 11/9

5:48 pm-1:45 pm

1 stop19h 57m

$306

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 15 results
1
2

Best time to book a flight from Jacksonville to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Jacksonville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Jacksonville to Islip

What is the cheapest month to book a flight from Jacksonville to Islip?

Currently, January is the cheapest month in which you can book a flight from Jacksonville to Islip (average of $108). Flying from Jacksonville to Islip in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from JAX to ISP?

Find hourly flight availability from Jacksonville to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Jacksonville to Islip at noon. If you’re flexible enough to do this you can expect to save up to 21% on your trip compared to booking a flight in the evening.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated September 16, 2025.
Get a feel of what it's like to fly with Southwest from Jacksonville to Islip by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Entertainment

7.5

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

Related info for your journey

Find useful and relevant information for your journey from Jacksonville to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Jacksonville to Islip?

    Airlines like Frontier and Southwest fly from Jacksonville to Islip in about 4h 40m. The time it takes to get you to your destination can typically vary by up to 11h 16m. The distance between Jacksonville and Islip is about 858 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What is the cheapest airline to fly from Jacksonville to Islip round-trip?

    Currently priced at $277, Southwest will fly you from Jacksonville to Islip and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Southwest is 34% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Jacksonville to Islip that include hotel bookings?

    Yes. In addition to deals on Jacksonville to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Jacksonville to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Jacksonville to Islip.

  • Can I find deals for business class flights from Jacksonville to Islip?

    Yes. Cheapflights offers flight deals from Jacksonville to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Jacksonville to Islip?

    Currently, January is the cheapest month in which you can book a flight from Jacksonville to Islip (average of $108). Flying from Jacksonville to Islip in November is currently the most expensive (average of $213). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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Alternative routes for Jacksonville to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Jacksonville to Islip

Discover the top airline that operate flights from Jacksonville to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$277Average$376FlexibilityNo cancel feeOn-time63%

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