ISP - JAX

$146 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 2/21. 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

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Everything you should know

Cheapest round-trip
$272
Overall average: $556
Multiple Airlines
Wed 3/4Wed 3/11
ISP - JAX • 1 stop
Cheapest one-way
$146
Breeze Airways
Sat 2/21
ISP - JAX • 1 stop
Top airlines
Southwest
Cheapest • from $308 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
November
Cheapest • 24% 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

Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
11:50 am - 10:41 am
ISP
-
JAX
22h 51m
1 stop
Multiple Airlines Logo
8:18 pm - 4:13 pm
JAX
-
ISP
19h 55m
2 stops
$272Multiple Airlines
Wed, Mar 4 - Wed, Mar 11
Multiple Airlines Logo
11:50 am - 10:41 am
ISP
-
JAX
22h 51m
1 stop
Multiple Airlines Logo
8:18 pm - 4:13 pm
JAX
-
ISP
19h 55m
2 stops
$307Multiple Airlines
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
6:30 am - 11:05 am
ISP
-
JAX
4h 35m
1 stop
Southwest Logo
5:00 pm - 11:30 pm
JAX
-
ISP
6h 30m
1 stop
$308Southwest
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
9:00 am - 1:40 pm
ISP
-
JAX
4h 40m
1 stop
Southwest Logo
6:05 am - 4:30 pm
JAX
-
ISP
10h 25m
2 stops
$313Southwest
Wed, Mar 4 - Wed, Mar 11
Southwest Logo
3:45 pm - 8:35 pm
ISP
-
JAX
4h 50m
1 stop
Southwest Logo
6:45 pm - 10:50 pm
JAX
-
ISP
4h 05m
1 stop
$317Southwest
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
12:30 pm - 9:30 pm
ISP
-
JAX
9h 00m
2 stops
Southwest Logo
3:25 pm - 11:30 pm
JAX
-
ISP
8h 05m
2 stops
$318Southwest
Thu, Apr 30 - Sun, May 3
Southwest Logo
4:30 pm - 9:25 pm
ISP
-
JAX
4h 55m
1 stop
Southwest Logo
6:00 pm - 11:50 pm
JAX
-
ISP
5h 50m
1 stop
$319Southwest
Wed, Mar 4 - Wed, Mar 11
Southwest Logo
12:40 pm - 9:15 pm
ISP
-
JAX
8h 35m
2 stops
Southwest Logo
6:00 am - 4:05 pm
JAX
-
ISP
10h 05m
2 stops
$327Southwest
Fri, Mar 20 - Sat, Mar 28
Southwest Logo
2:00 pm - 8:10 pm
ISP
-
JAX
6h 10m
1 stop
Southwest Logo
7:30 pm - 11:35 pm
JAX
-
ISP
4h 05m
1 stop
$342Southwest
Sat, Mar 21 - Sun, Mar 29
Multiple Airlines Logo
11:50 am - 10:41 am
ISP
-
JAX
22h 51m
1 stop
Multiple Airlines Logo
6:21 pm - 12:33 pm
JAX
-
ISP
18h 12m
2 stops
$346Multiple Airlines
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 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 $556 and $516 respectively.

Find deals

Good to know

Low seasonNovember
Cheapest flight$146
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 17% 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 $146 for a one-way ticket and $272 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.
8.0
SouthwestOverall score based on 4275 reviews
7.0Food
8.0Comfort
8.1Boarding
8.6Crew
7.5Entertainment
Airline reviews

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

10.0 ExcellentMeghan, Feb 2026
MCO - DEN
Read more Southwest reviews

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

Okay, not wonderful. Short flight. Wi-fi didn't work properly. Stuck waiting for a gate to open upon arrival for 20 or so minutes.

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.

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!

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.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

It is southwest seat was ok. Not the most comfortable seat

Plz don't take away free bags and free seating

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

Information on your arrival and departure airports

Islip (ISP)
Jacksonville (JAX)