$149 Cheap Flights from Islip (ISP) to Jacksonville (JAX)

View $149 flight on Wed, Mar 11, 2026Opens in a new window

Popular airlines from MacArthur Airport (ISP) to Jacksonville International Airport (JAX)

Cheap Flights from Islip to Jacksonville (ISP-JAX)

Prices were available within the past 7 days and start at $149 for one-way flights and $297 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Wed, Mar 11 - Wed, Mar 25
ISP
Islip
JAX
Jacksonville
$297 Roundtrip, found 13 hours ago
$297
Roundtrip
found 13 hours ago
Select Southwest Airlines flight, departing Wed, Mar 11 from Islip to Jacksonville, returning Wed, Mar 25, priced at $297 found 13 hours ago
Southwest Airlines
Wed, Apr 8 - Mon, Apr 13
ISP
Islip
JAX
Jacksonville
$308 Roundtrip, found 10 hours ago
$308
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Wed, Apr 8 from Islip to Jacksonville, returning Mon, Apr 13, priced at $308 found 10 hours ago
Southwest Airlines
Sat, Aug 8 - Sun, Aug 23
ISP
Islip
JAX
Jacksonville
$317 Roundtrip, found 13 hours ago
$317
Roundtrip
found 13 hours ago
Select Southwest Airlines flight, departing Sat, Aug 8 from Islip to Jacksonville, returning Sun, Aug 23, priced at $317 found 13 hours ago
Southwest Airlines
Tue, Apr 14 - Sat, Apr 18
ISP
Islip
JAX
Jacksonville
$322 Roundtrip, found 4 days ago
$322
Roundtrip
found 4 days ago
Select Southwest Airlines flight, departing Tue, Apr 14 from Islip to Jacksonville, returning Sat, Apr 18, priced at $322 found 4 days ago
Southwest Airlines
Mon, May 18 - Wed, May 20
ISP
Islip
JAX
Jacksonville
$324 Roundtrip, found 3 days ago
$324
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Mon, May 18 from Islip to Jacksonville, returning Wed, May 20, priced at $324 found 3 days ago
Southwest Airlines
Wed, Apr 8 - Mon, Apr 13
ISP
Islip
JAX
Jacksonville
$329 Roundtrip, found 10 hours ago
$329
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Wed, Apr 8 from Islip to Jacksonville, returning Mon, Apr 13, priced at $329 found 10 hours ago
Southwest Airlines
Wed, Apr 8 - Mon, Apr 13
ISP
Islip
JAX
Jacksonville
$330 Roundtrip, found 10 hours ago
$330
Roundtrip
found 10 hours ago
Select Southwest Airlines flight, departing Wed, Apr 8 from Islip to Jacksonville, returning Mon, Apr 13, priced at $330 found 10 hours ago
Southwest Airlines
Wed, Jun 3 - Tue, Jun 9
ISP
Islip
JAX
Jacksonville
$337 Roundtrip, found 5 hours ago
$337
Roundtrip
found 5 hours ago
Select Southwest Airlines flight, departing Wed, Jun 3 from Islip to Jacksonville, returning Tue, Jun 9, priced at $337 found 5 hours ago
JetBlue Airways
Tue, Mar 17 - Sat, Mar 21
ISP
Islip
JAX
Jacksonville
$353 Roundtrip, found 1 day ago
$353
Roundtrip
found 1 day ago
Select JetBlue Airways flight, departing Tue, Mar 17 from Islip to Jacksonville, returning Sat, Mar 21, priced at $353 found 1 day ago
Breeze Airways
Mon, Aug 24 - Tue, Sep 8
ISP
Islip
JAX
Jacksonville
$467 Roundtrip, found 8 hours ago
$467
Roundtrip
found 8 hours ago
Select Breeze Airways flight, departing Mon, Aug 24 from Islip to Jacksonville, returning Tue, Sep 8, priced at $467 found 8 hours ago

Alternative airports near Jacksonville

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Jacksonville Intl. JAX. Cheapest option available. Average driving time to city center is 19 minutes. Flights from $437
JAX
Jacksonville Intl.
Cheapest
Average driving time to city center19 min
Flights from $437
Flights from Islip (ISP) to Jacksonville (JAX)
Origin airport
MacArthur
Destination airport
Jacksonville Intl.
Airlines serving
Breeze Airways, JetBlue Airways, Southwest Airlines
Roundtrip price
$296
Distance
858 mi

Islip to Jacksonville Flights

The cheapest times to fly from Islip to Jacksonville

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to Jacksonville are during the month of March. You can find some of the cheapest flights from Islip to Jacksonville with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Jacksonville

Sunday is one of the best days to book for cheap flights from Islip to Jacksonville: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to Jacksonville

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to Jacksonville in 2026. You can also book with separate airlines for your outbound and return journeys, from $149 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to Jacksonville flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to Jacksonville airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) cost?
You can find cheap one-way flights from $149 and cheap return flights from $297 Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) with Expedia. One-way flights typically cost between $203 and $1050, and return flights often range between $433 and $1629. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
The cheapest month to fly from ISP to JAX is March when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
Enter ISP to JAX and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
How do I find cheap flights from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
To find a cheap flight from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
The earliest flight from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) usually departs at around 5:00 AM, operated by Southwest Airlines. This seasonal service is active in May, allowing you to start your day early and make the most of your time in Jacksonville. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
The most popular departure times for flights from Islip, NY (ISP) to Jacksonville, FL (JAX) are in the early morning, from 6am to 9am. About 36% of passengers prefer this time window. Many major carriers, including American Airlines and United Airlines, offer flights during this window. This timing is favored because it lets you maximize your time in Jacksonville after arriving in the morning.
How long does it take to fly from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
Flights from ISP to JAX with one stop typically take around 6 hours 30 minutes, covering approximately 858 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
Select the "Business class" and "First class" filters when looking for ISP to JAX flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) flight with Expedia?
It's easy to earn miles on a Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Jacksonville from MacArthur (ISP)?
If you're planning to travel to Jacksonville from MacArthur (ISP), you can fly into Jacksonville Intl. (JAX) Some flights may connect through major hubs like Logan Intl. (BOS), Baltimore Washington Intl. Thurgood Marshall (BWI), Orlando Intl. (MCO) before reaching Jacksonville. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) at the last minute?
Typically, booking a last minute flight from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) flight and hotel package?
Securing a Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) Jacksonville Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.)?
If you booked your Islip, NY (ISP-MacArthur) to Jacksonville, FL (JAX-Jacksonville Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

*Flight schedules are subject to change.

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*Available to One Key members.