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$120+ Cheap flights from Islip, NY to Jacksonville (ISP - JAX)

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 9/3. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — JAX
ago. 23 — ago. 301
sáb. 8/23
sáb. 8/30
1 adult, Economy
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Cheap flight deals from Islip to Jacksonville

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Jacksonville (JAX). 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 agosto 18, 2025.

Round-trip from

$233
(FlightHub)

One-way from

$120
(FlightHub)

Popular in

March

Cheapest in

August

Average price

$299
From Islip Long Island to Jacksonville
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One-way flight from Islip Long Island to Jacksonville
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Highest demand for flights based on searches. 12% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Islip to Jacksonville

Cheapest flights from Islip to Jacksonville
Explore the most affordable flight options available from Islip to Jacksonville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on agosto 18, 2025.

This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/1711:35 amISP - JAX
2 stops24h 08mFrontier
dom. 9/213:34 pmJAX - ISP
2 stops19h 06mFrontier
Deal found 8/16$233
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/135:05 pmISP - JAX
2 stops18h 38mFrontier
lun. 9/154:16 pmJAX - ISP
2 stops18h 24mFrontier
Deal found 8/16$242
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 9/1411:25 amISP - JAX
2 stops27h 56mFrontier
dom. 9/213:34 pmJAX - ISP
2 stops19h 06mFrontier
Deal found 8/17$243
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/125:05 pmISP - JAX
2 stops45h 34mFrontier
lun. 9/154:16 pmJAX - ISP
2 stops18h 24mFrontier
Deal found 8/16$249
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/55:05 pmISP - JAX
2 stops42h 38mFrontier
dom. 9/73:34 pmJAX - ISP
2 stops19h 06mFrontier
Deal found 8/16$257
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/83:43 pmISP - JAX
2 stops25h 27mFrontier
lun. 10/139:47 pmJAX - ISP
2 stops37h 10mFrontier
Deal found 8/18$260
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/125:05 pmISP - JAX
2 stops42h 38mFrontier
dom. 9/143:34 pmJAX - ISP
2 stops19h 06mFrontier
Deal found 8/16$262
This FlightHub deal was found by Cheapflights users on 8/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/2511:40 amISP - JAX
2 stops27h 41mFrontier
jue. 10/212:38 pmJAX - ISP
2 stops22h 02mFrontier
Deal found 8/17$266
This FlightHub deal was found by Cheapflights users on 8/18. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/1811:40 amISP - JAX
2 stops27h 41mFrontier
jue. 9/2512:38 pmJAX - ISP
2 stops22h 02mFrontier
Deal found 8/18$267
This FlightHub deal was found by Cheapflights users on 8/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/286:27 pmISP - JAX
2 stops45h 46mFrontier
lun. 11/310:38 pmJAX - ISP
2 stops35h 59mFrontier
Deal found 8/16$269
This Southwest deal was found by Cheapflights users on 8/18. 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.
mié. 9/1012:30 pmISP - JAX
1 stop5h 30mSouthwest
mié. 9/1711:10 amJAX - ISP
1 stop4h 00mSouthwest
Deal found 8/18$277

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Jacksonville 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 agosto 18, 2025.
Use the filters below to find and compare flights from Islip to Jacksonville that are best for you.

Fly from

Islip

Fly to

Jacksonville

Route

Depart

Return

Price

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

mié. 9/17

11:35 am-11:43 am

2 stops24h 08m

Jacksonville

dom. 9/21

3:34 pm-10:40 am

2 stops19h 06m

$233

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

sáb. 9/13

5:05 pm-11:43 am

2 stops18h 38m

Jacksonville

lun. 9/15

4:16 pm-10:40 am

2 stops18h 24m

$242

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

sáb. 9/13

5:05 pm-11:43 am

2 stops18h 38m

Jacksonville

dom. 9/14

3:34 pm-10:40 am

2 stops19h 06m

$242

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

dom. 9/14

11:25 am-3:21 pm

2 stops27h 56m

Jacksonville

dom. 9/21

3:34 pm-10:40 am

2 stops19h 06m

$243

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

vie. 9/12

5:05 pm-2:39 pm

2 stops45h 34m

Jacksonville

lun. 9/15

4:16 pm-10:40 am

2 stops18h 24m

$249

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

jue. 11/13

6:37 pm-9:53 pm

2 stops27h 16m

Jacksonville

lun. 11/17

10:38 pm-5:42 pm

2 stops19h 04m

$249

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

vie. 9/5

5:05 pm-11:43 am

2 stops42h 38m

Jacksonville

dom. 9/7

3:34 pm-10:40 am

2 stops19h 06m

$257

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

mié. 10/8

3:43 pm-5:10 pm

2 stops25h 27m

Jacksonville

lun. 10/13

9:47 pm-10:57 am

2 stops37h 10m

$260

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

vie. 9/12

5:05 pm-11:43 am

2 stops42h 38m

Jacksonville

dom. 9/14

3:34 pm-10:40 am

2 stops19h 06m

$262

IslipJacksonville

ISP - JAX

ISPJAX

Islip Long Island

jue. 9/25

11:40 am-3:21 pm

2 stops27h 41m

Jacksonville

jue. 10/2

12:38 pm-10:40 am

2 stops22h 02m

$266

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 23 results
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Best time to book a flight from Islip to Jacksonville

Have a flexible travel schedule? Discover the best time to fly to Jacksonville from Islip 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 Islip to Jacksonville

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

Currently, August is the cheapest month in which you can book a flight from Islip, New York to Jacksonville (average of $278). Flying from Islip, New York to Jacksonville in March is currently the most expensive (average of $365). 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 ISP to JAX?

Find hourly flight availability from Islip to Jacksonville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Islip, New York to Jacksonville at noon. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight in the evening.

Reviews of airlines servicing Jacksonville

Get insights into the airlines that provide service to Jacksonville. 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 Jacksonville. Reviews last updated agosto 18, 2025.
Read through reviews of airlines operating flights from Islip to Jacksonville, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Food

7.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Islip to Jacksonville. 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 Islip, New York to Jacksonville?

    A quick flight from Islip, New York to Jacksonville can take about 24h 08m. Frontier provides one of the quickest options available for as low as $233. Airlines will cover a distance of 858 mi.

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

    Currently priced at $302, Southwest will fly you from Islip, New York to Jacksonville and back. In addition to Southwest, many other airlines offer competitively priced options for your trip. Southwest is 26% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Jacksonville 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 Islip, New York to Jacksonville?

    Currently, August is the cheapest month in which you can book a flight from Islip, New York to Jacksonville (average of $278). Flying from Islip, New York to Jacksonville in March is currently the most expensive (average of $365). 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 Jacksonville?

Book flights to Jacksonville if you plan to visit one of these locations
Jacksonville Beach
Orange Park
Kingsland
Fernandina Beach
Waycross

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Alternative routes for Islip to Jacksonville

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Top airline flying from Islip to Jacksonville

Discover the top airline that operate flights from Islip to Jacksonville. 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 agosto 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$302Average$406FlexibilityNo cancel feeOn-time63%

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