ISP - JAX

$214 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 8/12. 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

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
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Flights 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

Tue, Nov 4 - Tue, Nov 11
Southwest Logo
5:40 am - 10:25 amISP-JAX
4h 45m1 stop
Southwest Logo
7:00 am - 12:15 pmJAX-ISP
5h 15m1 stop
$259Southwest
Find Deal
Thu, Aug 28 - Thu, Sep 4
Southwest Logo
12:10 pm - 6:40 pmISP-JAX
6h 30m1 stop
Southwest Logo
4:05 pm - 10:55 pmJAX-ISP
6h 50m1 stop
$303Southwest
Find Deal
Tue, Nov 4 - Tue, Nov 11
Southwest Logo
5:40 am - 4:25 pmISP-JAX
10h 45m2 stops
Southwest Logo
7:00 am - 12:15 pmJAX-ISP
5h 15m1 stop
$304Southwest
Find Deal
Sat, Oct 4 - Sun, Oct 5
Southwest Logo
3:10 pm - 7:45 pmISP-JAX
4h 35m1 stop
Southwest Logo
5:30 am - 12:10 pmJAX-ISP
6h 40m1 stop
$312Southwest
Find Deal
Mon, Jan 5 - Fri, Jan 9
Southwest Logo
5:50 am - 10:25 amISP-JAX
4h 35m1 stop
Southwest Logo
6:50 am - 9:55 pmJAX-ISP
15h 05m2 stops
$314Southwest
Find Deal
Thu, Sep 11 - Sun, Sep 21
Southwest Logo
12:10 pm - 6:40 pmISP-JAX
6h 30m1 stop
Southwest Logo
7:40 pm - 11:50 pmJAX-ISP
4h 10m1 stop
$324Southwest
Find Deal
Fri, Sep 26 - Sun, Sep 28
Breeze Airways Logo
7:08 pm - 10:38 amISP-JAX
39h 30m2 stops
Breeze Airways Logo
5:48 pm - 1:45 pmJAX-ISP
19h 57m1 stop
$676Breeze Airways
Find Deal
Fri, Sep 26 - Sun, Sep 28
Breeze Airways Logo
2:25 pm - 8:53 amISP-JAX
18h 28m3 stops
Breeze Airways Logo
5:48 pm - 1:45 pmJAX-ISP
19h 57m1 stop
$687Breeze Airways
Find Deal
Tue, Aug 12 - Sat, Aug 16
Breeze Airways Logo
1:55 pm - 9:53 amISP-JAX
19h 58m1 stop
Breeze Airways Logo
12:50 pm - 6:59 pmJAX-ISP
30h 09m2 stops
$715Breeze Airways
Find Deal
Tue, Nov 4 - Tue, Nov 11
 Logo
7:30 am - 9:22 pmISP-JAX
13h 52m3 stops
 Logo
11:30 am - 10:58 amJAX-ISP
23h 28m2 stops
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 August, where tickets cost $280 (return) on average. On the other hand, the most expensive months are March and November, where the average cost of round-trip tickets is $646 and $556 respectively.

Good to know

Low seasonJune
Cheapest flight$214
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 21% 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 $214 for a one-way ticket and $259 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 4241 reviews
8.0Comfort
7.5Entertainment
8.1Boarding
7.0Food
8.6Crew
Airline reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

2.0 MediocreAnonymous, Jul 2025AUS - RDU
Read more Southwest reviews

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

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.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

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

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