$20 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 12/19. 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

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Cheap Flights from Islip to the United States

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Los Angeles
Los Angeles1 stop$185
Las Vegas
Las Vegas1 stop$130
Miami
Miami1 stop$237
San Francisco
San Francisco1 stop$398
Boston
Boston1 stop$136
Washington, D.C.
Baltimore1 stop$171
Denver
Denver1 stop$130
Seattle
Seattle2 stops$457
Fort Lauderdale
Fort Lauderdalenonstop$61
Atlanta
Atlanta1 stop$110
Tampa
Tampanonstop$69
Houston
Houston1 stop$130
San Diego
San Diego1 stop$517
Los Angeles
Los Angeles1 stop$185
Las Vegas
Las Vegas1 stop$130
Miami
Miami1 stop$237
San Francisco
San Francisco1 stop$398
Boston
Boston1 stop$136
Washington, D.C.
Baltimore1 stop$171
Denver
Denver1 stop$130
Seattle
Seattle2 stops$457
Fort Lauderdale
Fort Lauderdalenonstop$61
Atlanta
Atlanta1 stop$110
Tampa
Tampanonstop$69
Houston
Houston1 stop$130
San Diego
San Diego1 stop$517

Book Cheap Islip to the United States Plane Tickets

 
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

Sat, Dec 20 - Tue, Dec 23
Frontier Logo
4:40 pm - 7:52 pmISP-FLL
3h 12mnonstop
Frontier Logo
10:03 pm - 12:55 amFLL-ISP
2h 52mnonstop
$61Frontier
Find Deal
Sat, Dec 13 - Tue, Dec 23
Frontier Logo
10:19 am - 1:20 pmISP-MCO
3h 01mnonstop
Frontier Logo
8:45 am - 11:25 amMCO-ISP
2h 40mnonstop
$65Frontier
Find Deal
Fri, Dec 19 - Sat, Dec 20
Frontier Logo
1:27 pm - 4:31 pmISP-MCO
3h 04mnonstop
Frontier Logo
3:13 pm - 5:55 pmMCO-ISP
2h 42mnonstop
$66Frontier
Find Deal
Sun, Jan 4 - Sun, Jan 11
Multiple Airlines Logo
6:15 am - 9:31 amISP-TPA
3h 16mnonstop
Multiple Airlines Logo
7:15 am - 11:15 amTPA-ISP
4h 00m1 stop
$81Multiple Airlines
Find Deal
Fri, Jan 16 - Sun, Jan 18
Multiple Airlines Logo
8:45 pm - 11:58 pmISP-TPA
3h 13mnonstop
Multiple Airlines Logo
7:15 am - 11:15 amTPA-ISP
4h 00m1 stop
$83Multiple Airlines
Find Deal
Thu, Dec 11 - Thu, Dec 18
Breeze Airways Logo
2:19 pm - 6:11 pmISP-MSY
4h 52m1 stop
Breeze Airways Logo
8:30 am - 1:39 pmMSY-ISP
4h 09m1 stop
$137Breeze Airways
Find Deal
Mon, Jan 12 - Fri, Jan 16
Breeze Airways Logo
7:20 pm - 10:35 pmISP-RSW
3h 15mnonstop
Breeze Airways Logo
3:41 pm - 6:40 pmRSW-ISP
2h 59mnonstop
$138Breeze Airways
Find Deal
Sun, Jan 25 - Sat, Jan 31
JetBlue Logo
11:00 am - 2:05 pmISP-RSW
3h 05mnonstop
JetBlue Logo
12:35 pm - 3:16 pmRSW-ISP
2h 41mnonstop
$147JetBlue
Find Deal
Sun, Feb 1 - Fri, Feb 6
JetBlue Logo
11:00 am - 2:05 pmISP-RSW
3h 05mnonstop
JetBlue Logo
12:35 pm - 3:16 pmRSW-ISP
2h 41mnonstop
$162JetBlue
Find Deal
Sat, Dec 6 - Thu, Dec 11
Southwest Logo
3:40 pm - 8:40 pmISP-RSW
5h 00m1 stop
Southwest Logo
7:10 am - 12:30 pmRSW-ISP
5h 20m1 stop
$167Southwest
Find Deal
Booking Insights

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?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to the United States from Islip found in the last 72 hours was to Orlando, at $55 round-trip. The most popular route is from Islip (ISP) to Orlando Airport (MCO), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $55.

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 $282, prices are generally cheapest when you fly direct.

Good to know

Low seasonSeptember
Cheapest flight$20
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Islip to West Palm Beach

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 $149 one-way - $356 round-trip; Orlando $80 one-way - $151 round-trip; West Palm Beach $101 one-way - $225 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 230 reviews
8.3Boarding
6.6Entertainment
6.7Food
8.2Comfort
8.7Crew
Airline reviews

Something about the chair was uncomfortable, Maine the curvature of the back.

8.0 ExcellentJon, Nov 2025PVU - MCO
Read more Breeze Airways reviews

Something about the chair was uncomfortable, Maine the curvature of the back.

I would have liked to listen to music and that was not a choice. Would have liked a meal on almost 5 hour flight. 1st class not as nice as others.

Nice aircraft but no in flight entertainment was disappointing. I felt nickel and dimed to death having to pay for my seat, my carry-on and then my soda!

I was surprised with Breeze Airlines. It was my first time flying with them, and I was hesitant. It was a great experience. The seats are really comfortable. You have much more space than other airlines, and they are better quality seats. The service was amazing, and we landed almost an hour before schedule. It was an amazing experience; I really recommend Breeze Airlines.

Ridiculous to have to pay for carry on and to pick seats

We did have a delay but nothing that affected our schedule to terribly. Breeze is the best budget airline that we have found for the eastern seaboard. Price is good. Baggage rates aren't terrible. I suggest checking a bag which gets you more bang for your buck. They fly into smaller airports which is so much easier than trying to get through Logan or JFK. Overall good trip.

First time flying Breeze everything went smoothly. Left early and arrived early to our destination. Definitely will be flying again with them!😊

Great! Only problem is we can’t use the northbound flight on this route as it arrives much too late and is not non-stop.

Given some type of snack. Had staff that hated their job and life in general. Have regular overhead bins. The bags have to go sideways and even then, they barely fit. The seats in the front - what would be considered business class were nice. Nothing extra but nice for a short flight. But the regular seats were so close I have no idea how people even fit it them.

Our gate was changed twice, but since they were super close it wasn't an issue. We were delayed 90 mins or so, which wasn't great, but sometimes that's just what happens. Communication was the issue. We weren't kept informed about delays--with more information I would have gotten a real meal, taken a "bio break" and purchased a new book. Because another. flight was being updated more frequently about their delays, I thought ours would be shorter and stayed close by. It left me feeling more frustrated than was necessary.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Plane crashed into a bus or some other vehicle on the ground while pulling out of the gate. No injuries, but wing tip was damaged and returned to gate for “maintenance issues” and we departed 5 hours later because the plane went out of service and new plane was flown in from a nearby airport, Midway.

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Surprisingly was one of the better flights I’ve been on

Short 2-hour flight, we took off on time, ETA was earlier than stated, no interaction needed with stewards, no food, no entertainment on such a short flight.

Avelo provided exactly what I expected. They are a low-cost option with no frills but the experience was comfortable and the staff was great! I will be using them in the future for trips when cost is a priority for me.

Expect nothing and you will be fine. Seats are crammed.

Terrible landing. Uncomfortable seats. Great cabin crew-helpful and pleasant!

Tight fit in middle seat but OK for short flight. Crew was more interested in talking to each other than helping passengers - strickingly dissappointing. DAB is a great airport. New Haven sucks! Excellent value for the .

Avelo is definitely a budget airline and you get what you pay for. The plane was packed and the seats were not particularly comfortable. Staff was very nice and both of our flights were on time. The one thing I wish I had known was that the staff does not show up at the airport desk to check your bags until two hours before the flight. We had a 4:30 flight and had to check out of our hotel at noon. Since we have lounge passes we planned to check our bag, go through security and hang out at the lounge until we had to board. But because we could not check our bag until 2:30, when the staff showed up, we could not go through security and access the lounge. Passengers with boarding passes and carry on luggage would not have this issue. I might fly Avelo again but would only do carry on or plan to get to the airport no sooner than two hours before check in. And I would not recommend a long flight on Avelo since there is no food or entertainment and the seats are not comfortable.

No food or entertainment, but flight very comfortable and on time.

Baggage claim was barbaric at Wilmington. I realize that this is a startup airline but if they hope to grow or even survive they need to upgrade this airport. There is no automated luggage carousel and at times you are not only fighting your fellow passengers to get to your bags but also passengers coming in from other flights who cross right in front of you

No frills, i.e., no drinks or snacks. One is charged for everything. The cost really adds up. The crew and flight attendants were excellent and very pleasant.

Plane was in bad shape. TV’s and WiFi didn’t work. Plane need a refresh. Not enough room for bags.

Everything was great. I liked the text updates so that I never miss a gate change & I have all the latest info.

No internet on a flight over three hours in this age is criminal. Staff inattentive and dismissive

Worst flight experience ever flights canceled. JetBlue told us just did not even bother standing in line to come back in one and a half hours then without any information we had to go pick up all of our luggage and spend over $2000 in accommodation just to get home. JetBlue said that the next flight available for us to get home would be three days later. Absolutely absurd hasn’t offered to give us any compensation do not fly JetBlue horrible company. They said it was based on the weather and the weather is great in all locations that we would’ve been flying to total hoax. I think it’s a conspiracy theory.

flight was delayed for hours with no explanation. The plane was a very old aircraft.

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.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

Better than expected. Staff were friendly and nice on both flights.

There was no one at the counter to assist with our check in. The app didn’t work, so I arrived at the airport with time to check in and I couldn’t because no employees were there. When I finally got someone on the phone, it was inside the 60min rule and they said I could no longer check in and they could sell me another ticket. We had to scramble and pay an additional $800 for tickets and THEN AFTER (about 60 min from my original convo with customer service and 10min after original departure time) I had boarded my new flight, there was email saying my original flight from Frontier was delayed and leaving 2hr 50min later, but I STILL wouldn’t have been able to check in. Which means customer service should have been able to see it and let me check in because I was well within my check in time. When I call Frontier, they hang up on me. So their app didn’t work and they employees left and they take zero responsibility or assistance with their “customer service”

Terrible. Flight cancelled with no reasoning and no flights to rebook. Employees were useless and did nothing to help. Did not even know where to retrieve luggage from the cancelled flight. Flyers beware.

No fault of Frontier staff: plane was very late, reached Orlando at 1 am, took a while to get luggage. Weather, gov financial shutdown impact on TSA, air controllers seemed to have multiple flights backed up. Frontier staff seemed to cope as gracefully as possible. It did reassure me that I and my new hip could adapt to travel challenges. Food/entertainment were irrelevant to my trip.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

Everything you need to know for your flight from Islip to the United States

Information on your arrival and departure airports