$40 Find Cheap Flights from Islip to the United States

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 the United States departing on 10/23. 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

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Flights Deals

Best United States Flight Deals from Islip

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Los Angeles
Los Angeles1 stop$234
Las Vegas
Las Vegas1 stop$270
Miami
Miami1 stop$247
San Francisco
San Francisco1 stop$314
Boston
Boston1 stop$214
Washington, D.C.
Baltimorenonstop$144
Denver
Denver1 stop$263
Seattle
Seattle1 stop$383
Fort Lauderdale
Fort Lauderdalenonstop$167
Atlanta
Atlanta1 stop$111
Tampa
Tampa1 stop$117
Houston
Houston1 stop$194
Honolulu
Honolulu2 stops$924
San Diego
San Diego1 stop$351
Philadelphia
Philadelphia1 stop$212
Los Angeles
Los Angeles1 stop$234
Las Vegas
Las Vegas1 stop$270
Miami
Miami1 stop$247
San Francisco
San Francisco1 stop$314
Boston
Boston1 stop$214
Washington, D.C.
Baltimorenonstop$144
Denver
Denver1 stop$263
Seattle
Seattle1 stop$383
Fort Lauderdale
Fort Lauderdalenonstop$167
Atlanta
Atlanta1 stop$111
Tampa
Tampa1 stop$117
Houston
Houston1 stop$194
Honolulu
Honolulu2 stops$924
San Diego
San Diego1 stop$351
Philadelphia
Philadelphia1 stop$212

Cheap Flights from Islip to the United States

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Islip to the United States 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 the United States

Mon, Sep 15 - Fri, Sep 19
Breeze Airways Logo
8:47 pm - 10:59 pmISP-CHS
2h 12mnonstop
Breeze Airways Logo
6:14 pm - 8:07 pmCHS-ISP
1h 53mnonstop
$78Breeze Airways
Find Deal
Fri, Sep 12 - Mon, Sep 15
Breeze Airways Logo
8:47 pm - 10:59 pmISP-CHS
2h 12mnonstop
Breeze Airways Logo
6:14 pm - 8:07 pmCHS-ISP
1h 53mnonstop
$86Breeze Airways
Find Deal
Sat, Jul 19 - Sat, Jul 26
Frontier Logo
8:37 pm - 11:32 pmISP-MCO
2h 55mnonstop
Frontier Logo
4:55 pm - 7:42 pmMCO-ISP
2h 47mnonstop
$97Frontier
Find Deal
Sat, Jul 26 - Thu, Jul 31
Frontier Logo
8:37 pm - 11:32 pmISP-MCO
2h 55mnonstop
Frontier Logo
9:02 pm - 11:47 pmMCO-ISP
2h 45mnonstop
$99Frontier
Find Deal
Fri, Aug 15 - Thu, Aug 21
 Logo
10:44 am - 3:04 pmISP-TPA
4h 20m1 stop
 Logo
5:15 pm - 8:06 pmTPA-ISP
2h 51mnonstop
Wed, Jul 23 - Wed, Jul 30
Southwest Logo
6:25 am - 9:10 amISP-MCO
2h 45mnonstop
Southwest Logo
6:35 am - 9:10 amMCO-ISP
2h 35mnonstop
$127Southwest
Find Deal
Mon, Aug 11 - Tue, Aug 19
Southwest Logo
4:20 pm - 7:10 pmISP-MCO
2h 50mnonstop
Southwest Logo
7:25 am - 11:55 amMCO-ISP
4h 30m1 stop
$152Southwest
Find Deal
Wed, Jul 30 - Wed, Aug 6
 Logo
4:45 pm - 7:50 pmISP-TPA
3h 05mnonstop
 Logo
7:45 am - 1:32 pmTPA-ISP
5h 47m1 stop
Sat, Jul 19 - Thu, Jul 24
JetBlue Logo
11:40 am - 2:37 pmISP-FLL
2h 57mnonstop
JetBlue Logo
8:00 am - 10:51 amFLL-ISP
2h 51mnonstop
$167JetBlue
Find Deal
Fri, Aug 1 - Mon, Aug 4
JetBlue Logo
4:15 pm - 7:05 pmISP-PBI
2h 50mnonstop
JetBlue Logo
12:30 pm - 3:13 pmPBI-ISP
2h 43mnonstop
$182JetBlue
Find Deal
Useful Info

KAYAK's insights & trends for Islip to the United States flights

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

What is the cheapest Islip to the United States flight route?

The cheapest price for flight routes found by users searching on KAYAK in the last 2 weeks for round-trip flights from Islip to the United States.

The cheapest ticket to the United States from Islip found in the last 72 hours was to Atlanta, at $218 round-trip. The most popular route is from Islip (ISP) to Boston (BOS), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $502.

Can I save money by flying with a layover from Islip to the United States?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $304, prices are generally cheapest when you fly direct.


Good to know

Low seasonSeptember
High seasonApril
Cheapest flight$40
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Islip to Tampa

FAQs - booking United States flights

  • How does KAYAK find such low prices on flights from Islip to the United States?

    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 the United States.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Islip to the United States 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 the United States?

    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 from Islip to the United States with an airline and back with another airline.

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

    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 from Islip to the United States up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to the United States

  • Looking for a cheap flight? 25% of our users found tickets from Islip to the following destinations at these prices or less: Baltimore $183 one-way - $334 round-trip; Orlando $106 one-way - $162 round-trip; West Palm Beach $133 one-way - $217 round-trip

Reviews of the top 5 airlines serving from Islip to the United States

 
Need help choosing which airline to fly with from Islip to the United States? 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.
8.1
Breeze AirwaysOverall score based on 182 reviews
8.8Crew
8.2Comfort
6.6Entertainment
8.4Boarding
6.8Food
Airline reviews

Breeze was good but the sandiego airport had traffic and waiting 1 hour in the plane till take off

10.0 ExcellentAnonymous, Jun 2025SAN - PIT
Read more Breeze Airways reviews

Breeze was good but the sandiego airport had traffic and waiting 1 hour in the plane till take off

The return flight was soooooo much colder than the departure flight to Connecticut! I appreciated the layover because I didn't have to change planes. The staff and the service were the best! Everyone was so professional and accommodating. Having internet was great, but for the movies the flight offers through the app could be updated. THANKS EVERYONE! I fly BREEZE every opportunity I can get.

The flight was comfortable with the usual slight turbulence. Macadamia Nuts would be great snacks to purchase in flight.

This is one of the worst trips that I have ever had. Ending up with an overnight delay. I’m not happy with the fact that they did not provide and set up the arrangement needed for lodging that we had to do it on our own. I also feel there should’ve been Compensation for food.

Had to approach landing twice which caused concern but probably due to weather

This was my first time flying your airline and it was okay. The people were nice but I am not used to all the add ons and no movies or even water. But I knew it was going to be that way. I think I prefer paying for the extras to be more comfortable.

Plane did no snacks and had no wifi or entertainment although the flight was 4 hours long.

My original booking was a nonstop flight. It got changed to a flight with a 6vhour layover that became a 7+ hour lay over. I'll never fly this airline again after this roundtrip is over.

I was surprised at how wonderful it was. The aircraft was clean. The crew was warm and welcoming and as a result the passengers were friendly. One warning the only free thing was water. I kind of liked picking wet hat I was willing to pay for and what I was willing to skip.

The flight wasn’t big on frills, which is fine with me. I flew into Islip MacArthur Airport, which saved me from having to go through LaGuardia to visit friends on Long Island. It was inexpensive and super convenient!

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

For my birthday trip this was my second time ever flying, this trip was the best.

after landing, we stay 2 hours on the taxi way before reaching the gate The airline and the crew were good though

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Sat on tarmac for 2 hours and then missed my connecting flight

First time traveling on Southwest since bag fees were implemented. Usual good service. Just more expensive now.

Everything was on time. I was disappointed by the front section female, African American flight attendant. I did not see her name tag or would have identified by name not race. As passengers moved to the bathroom early in flight, she would say with a disdainful tone “I have to say the seat belt light is on” then go back to her book. Better trained flight attendants say something like be careful the seat belt light is on.

Cluster mess boarding. Can't wait for SWA reserved seating. Internet didn't seem to work on the plane.

Flights delayed by 4-6 hours. Boarding was a mess and unclear. Bags were not at arrival airport and had never even been put on the plane. No idea when I’ll get them. Don’t fly into Denver!

Communication since no reason or explanation was given for 3 hrs delay

The flight departed more than 1 hour late. Leg room is bigger than most airlines

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

No music app working: no economy meal on five hour flight; hour on tarmac at the end waiting for a gate. Flight itself was smooth and easy.

Communication with the customer and stay is important. Staff off with a minor inconvenience but it worked out of course. Also this was a very old Mint Class plane. They snuck this one in on us. The updated aircraft are much better.

The flight itself was fine, but the boarding process was extremely frustrating. There is no one scanning boarding passes - passengers just scan themselves and enter the jetway. By the time my husband and I got on the plane and were halfway to our seats they determined there were too many bags on the plane and everything at that point needed to be checked. This created a lot of unnecessary chaos. They should have alerted people before getting on the plane that they would need to start checking bags instead of waiting until people were already on the plane.

The best flight I’ve had in a while. The plane was like 25% capacity, if that. Smoothest boarding and deplaning process I’ve ever experienced. Wish all flights were this smooth.

In flight on demand didn't work at our seats. Only a single beverage/snack run.

Traveling with JetBlue from NYC was convenient as accessing JFK airport was straightforward via the LIRR to the AirTrain. Maneuvering through the terminal was hassle-free, which was a pleasant start to the journey. However, the flight experience itself left much to be desired. The seating arrangement was notably uncomfortable; despite securing a window seat, space felt cramped. This was exacerbated by the middle seat passenger encroaching on my area, which made the flight less enjoyable. Additionally, while the in-flight entertainment system initially seemed like a reprieve, the sound outlet on my seat was inoperable. This issue turned what could have been a manageable three-hour flight into a rather tedious ordeal, as I was unable to use the entertainment system effectively. While JetBlue provided a smooth process in terms of airport logistics, the on-board experience highlighted areas in need of improvement, particularly in terms of comfort and entertainment system maintenance.

Over 2 hour delay for a 50-minute flight is unacceptable, especially in normal weather. Very poor communication via app

I wanted to upgrade my seat because I’m 6’2 and never have enough leg room for my comfort. They upgraded my seat for free putting me in an emergency exit seat. I was very comfortable

I have never flown Spirit it was much better than anticipated!

Staff was very friendly. They attended to people nicely and reprimanded, in a professional way, to those who wouldn’t listen. AC wasn’t working on the flight waiting to depart in Burbank, so it was uncomfortable for a while since the flight was delayed but then better before take off.

This was the first time I use Spirit Airlines and was pleasantly surprised. It was a last-minute booking and I was happy to see there was availability on your airline for a price that was affordable. The staff was friendly. The only things I thought were missing, were the ability to recline the seats, although I don’t use that very often, and it would’ve been nice to have power access at the seats to plug in my devices.

Flight was on time and was not crowded. Flight attendants were very understanding of my wife’s back problems.

Good on that leg. When I arrived in Detroit I had to wait over an hour for luggage.

Not very good because of an almost 3 hour delay for an hour long flight.

We had an almost 7 hour flight delay. We left the gate twice and taxi-ed and then returned the gate twice. Finally we got a new flight crew (our third one) and then left the gate to the final time before departing at 6:45pm (original flight time was 12pm). Out of Newark.

I made it safely. The flight was delayed, though. Not upset or expect anything.

The flight times got delayed multiple times due to weather which is understandable, but later the time got prepared 30min. Made to the flight barely but got stressed too much.

My flight was delayed by two hours which made it so that I would miss my layover flight. I stood in line for customer service for over an hour and when I reached the agent she told me to scan a QR code and it'll give me options. I wasn't offered any help, guidance or compensation, only told that I have options but that I had to figure it all out myself. I was refunded part of the trip and had to buy an expensive same day ticket from another airline in order to get home. I will never fly Frontier again.

We were delayed three times ,and that destroyed my plans, and reservations

Very bad! No good service delayed my second connection flight

The confirmation # CK8GNW and my name was not recognized/in Frontier system. I was able to check in on Frintier app so i went to the Frontier ticket agent, at time they told me that my name/ confirmation did not show up as a purchased ticket. I had to purchase a new ticket that cost $289.00 one way.

Flight was late. Missed connecting in Denver. My new flight is more than 24 hours later and I have no room, vouchers, or compensation, and might also be bumped from the one tomorrow.

Frontier is terrible. Paid for exit row, not given exit row, refused to refund fee.

2 hour delay due to late plane, wrong size plane causing overbooking, and people getting off and on the plane after boarding was completed.

We had to wait in line over an hour just to check our bags. It's a good thing we were so early to the airport. Only one clerk was working and the line was around the corner and down the hall. No good. I felt bad for her. Not sure how she kept her sanity with all the upset people. Then we get to our gate and there is no seating. Everyone was standing. Then I realize it is not a gate at all, we still have to be shuttled to our airplane. Ugh. Then we were late taking off and missed a window of opportunity before the airport runways were shut down for some reason. (not frontier's fault the runway shut down.) The seats on the airline are crammed and there is no cushion. Never had a tighter seating arrangement while flying. My 6' 4" husband was absolutely miserable the whole time with knees digging in to the seat in front of him. You think you are getting a good deal on a ticket, and then wham! I had to pay 75 dollars for our checked bags and 75 dollars for a carry on. No other airline does that!!! And also, there is a 40 pound weight limit on checked bags... Would have been cheaper flying with another airline, and I would have at least gotten a snack and drink. Was thankful for the tiny cup of water at least.

This was one of the first frontier airline flights this spring that wasn't delayed. It actually left on time. Some of the flight crew did not look happy, they didn't smile when the passengers were boarding or getting off the plane, and the passengers initiated greetings, not the staff. To me this was an odd experience to have with any flight/airline. I had a bad experience booking this flight. The price didn't solidify until late hours into the night. Ever time I purchased the ticket, I either received a denial email or an error because the price has changed, but it was never reflected on the flyfrontier or kayak websites until way after midnight on the date of travel. This caused me anxiety and irritation with the websites. Then I noticed a mishap with my name on my voucher as I went to check in, it was incorrect. When I proceeded to correct it, Frontier had no easy, let alone free, way to remedy it. I couldn't correct my name without a $75 charge, I couldn't cancel my voucher to repurchase it with the correct name without a $100 charge, because it was too close to departure. Then calling frontier was nearly impossible to remedy the situation with a human. It's already difficult to want to choose frontier because of all the upcharges, but you feel kinda trapped into doing so because it's the more affordable airline.

They canceled flight. Hard to believe there was even a plane incoming for us to get on

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