ISP - JAX

$147 Find Cheap Flights from Islip to Jacksonville

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Jacksonville departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Jacksonville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Jacksonville, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Islip to Jacksonville, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$369
Overall average: $403
Southwest
Thu 1/22Sun 1/25
ISP - JAX • 1 stop
Cheapest one-way
$147
Typical prices: $260-$391
Breeze Airways
Mon 1/12
ISP - JAX • 2 stops
When to travel
November
Cheapest • 25% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Jacksonville!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Islip to Jacksonville (ISP-JAX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to Jacksonville that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Jacksonville

Thu, Jan 22 - Sun, Jan 25
Southwest Logo
3:45 pm - 8:35 pm
ISP
-
JAX
4h 50m1 stop
Southwest Logo
8:00 am - 11:55 am
JAX
-
ISP
3h 55m1 stop
$369Southwest
Thu, Jan 22 - Sun, Jan 25
Southwest Logo
3:45 pm - 8:35 pm
ISP
-
JAX
4h 50m1 stop
Southwest Logo
6:20 am - 4:35 pm
JAX
-
ISP
10h 15m2 stops
$374Southwest
Thu, Jan 22 - Sun, Jan 25
Southwest Logo
12:40 pm - 9:15 pm
ISP
-
JAX
8h 35m2 stops
Southwest Logo
6:45 am - 4:35 pm
JAX
-
ISP
9h 50m2 stops
$379Southwest
Fri, Jan 23 - Sun, Jan 25
Southwest Logo
6:00 am - 11:10 am
ISP
-
JAX
5h 10m1 stop
Southwest Logo
8:00 am - 11:55 am
JAX
-
ISP
3h 55m1 stop
$397Southwest
Fri, Jan 23 - Sun, Jan 25
Southwest Logo
3:45 pm - 8:35 pm
ISP
-
JAX
4h 50m1 stop
Southwest Logo
6:45 am - 4:35 pm
JAX
-
ISP
9h 50m2 stops
$402Southwest
Thu, Feb 12 - Tue, Feb 17
Southwest Logo
5:35 pm - 10:00 pm
ISP
-
JAX
4h 25m1 stop
Southwest Logo
6:30 pm - 10:20 pm
JAX
-
ISP
3h 50m1 stop
$416Southwest
Sat, Jan 10 - Sun, Jan 11
Southwest Logo
12:15 pm - 4:55 pm
ISP
-
JAX
4h 40m1 stop
Southwest Logo
6:30 pm - 10:20 pm
JAX
-
ISP
3h 50m1 stop
$417Southwest
Thu, Feb 12 - Tue, Feb 17
Southwest Logo
5:35 pm - 10:00 pm
ISP
-
JAX
4h 25m1 stop
Southwest Logo
6:45 am - 4:25 pm
JAX
-
ISP
9h 40m2 stops
$421Southwest
Sat, Jan 10 - Sun, Jan 11
Southwest Logo
5:45 am - 10:50 am
ISP
-
JAX
5h 05m1 stop
Southwest Logo
6:20 am - 4:35 pm
JAX
-
ISP
10h 15m2 stops
$422Southwest
Sat, Mar 14 - Sat, Mar 21
Southwest Logo
5:50 pm - 10:05 pm
ISP
-
JAX
4h 15m1 stop
Southwest Logo
7:10 am - 11:40 am
JAX
-
ISP
4h 30m1 stop
$427Southwest
Booking Insights

KAYAK's insights & trends for Islip to Jacksonville flights

Get data-powered insights and trends into flights from Islip to Jacksonville to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Islip to Jacksonville?

The average price of all round-trip flights from Islip to Jacksonville clicked on KAYAK for each day over the last 12 months.

When flying from Islip to Jacksonville, you should consider leaving on a Saturday and avoid Tuesdays if you are looking for the best rates. For your return to Islip, you’ll find the best rates on Wednesdays and the most expensive ones on Mondays.

What is the cheapest month to fly from Islip to Jacksonville?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Islip to Jacksonville, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Islip to Jacksonville is November, where tickets cost $303 (return) on average. On the other hand, the most expensive months are March and September, where the average cost of round-trip tickets is $646 and $516 respectively.

Good to know

Low seasonNovember
Cheapest flight$147
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Islip to Jacksonville

When to book flights from Islip to Jacksonville

Are your dates flexible? Find out the best times to travel from Islip to Jacksonville 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.

FAQs for booking flights from Islip to Jacksonville

  • What is the cheapest flight from Islip to Jacksonville?

    In the last 3 days, the lowest price for a flight from Islip to Jacksonville was $147 for a one-way ticket and $369 for a round-trip.

  • Do I need a passport to fly between Islip and Jacksonville?

    A passport is not required to fly from Islip to Jacksonville.

  • Which airports will I be using when flying from Islip to Jacksonville?

    Islip and Jacksonville are both served by 1 main airport. You will leave Islip from Islip Long Island and will be arriving at Jacksonville.

  • Which aircraft models fly most regularly from Islip to Jacksonville?

    We unfortunately don’t have that data for this specific route.

  • What is the most popular layover when flying to Jacksonville from Islip?

    Baltimore is the most popular layover city among KAYAK users traveling from Islip to Jacksonville.

  • How does KAYAK find such low prices on flights from Islip to Jacksonville?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Jacksonville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Jacksonville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Jacksonville from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Jacksonville?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Jacksonville with an airline and back to Islip with another airline. Booking your flights between Islip and JAX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Jacksonville?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Jacksonville from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Islip to Jacksonville

 
See real verified KAYAK customer reviews for airlines flying from Islip to Jacksonville. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Islip to Jacksonville? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
SouthwestOverall score based on 4250 reviews
8.6Crew
7.0Food
8.1Boarding
8.0Comfort
7.5Entertainment
Airline reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

2.0 MediocreRobert, Dec 2025
LAS - TPA
Read more Southwest reviews

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

It was one and half hour late... Not sure if any other experience matters.

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

Information on your arrival and departure airports