$41 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 9/15. 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$300
Las Vegas
Las Vegas1 stop$337
Miami
Miami1 stop$247
San Francisco
San Francisco1 stop$279
Boston
Boston1 stop$252
Denver
Denver2 stops$302
Seattle
Seattle2 stops$364
Fort Lauderdale
Fort Lauderdalenonstop$147
Atlanta
Atlanta1 stop$234
Tampa
Tampa1 stop$135
Houston
Houston1 stop$268
Honolulu
Honolulu2 stops$1,173
San Diego
San Diego1 stop$302
Philadelphia
Philadelphia1 stop$298
Los Angeles
Los Angeles1 stop$300
Las Vegas
Las Vegas1 stop$337
Miami
Miami1 stop$247
San Francisco
San Francisco1 stop$279
Boston
Boston1 stop$252
Denver
Denver2 stops$302
Seattle
Seattle2 stops$364
Fort Lauderdale
Fort Lauderdalenonstop$147
Atlanta
Atlanta1 stop$234
Tampa
Tampa1 stop$135
Houston
Houston1 stop$268
Honolulu
Honolulu2 stops$1,173
San Diego
San Diego1 stop$302
Philadelphia
Philadelphia1 stop$298

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

Sat, Aug 30 - Fri, Sep 5
Breeze Airways Logo
2:12 pm - 4:19 pmISP-CHS
2h 07mnonstop
Breeze Airways Logo
6:14 pm - 8:07 pmCHS-ISP
1h 53mnonstop
$80Breeze Airways
Find Deal
Sat, Aug 30 - Fri, Sep 5
Breeze Airways Logo
2:12 pm - 4:19 pmISP-CHS
2h 07mnonstop
Breeze Airways Logo
6:14 pm - 8:07 pmCHS-ISP
1h 53mnonstop
$82Breeze Airways
Find Deal
Sat, Aug 23 - Tue, Sep 2
Frontier Logo
7:33 pm - 10:32 pmISP-MCO
2h 59mnonstop
Frontier Logo
9:14 pm - 11:59 pmMCO-ISP
2h 45mnonstop
$117Frontier
Find Deal
Tue, Sep 16 - Fri, Sep 19
Frontier Logo
11:27 am - 2:22 pmISP-MCO
2h 55mnonstop
Frontier Logo
8:00 am - 10:37 amMCO-ISP
2h 37mnonstop
$121Frontier
Find Deal
Tue, Jul 29 - Tue, Aug 5
JetBlue Logo
12:35 pm - 3:31 pmISP-FLL
2h 56mnonstop
JetBlue Logo
8:50 am - 11:41 amFLL-ISP
2h 51mnonstop
$147JetBlue
Find Deal
Wed, Jul 9 - Sat, Jul 12
Southwest Logo
6:50 am - 9:45 amISP-PBI
2h 55mnonstop
Southwest Logo
10:35 am - 1:15 pmPBI-ISP
2h 40mnonstop
$157Southwest
Find Deal
Sat, Jul 12 - Sun, Jul 13
JetBlue Logo
11:40 am - 2:37 pmISP-FLL
2h 57mnonstop
JetBlue Logo
8:50 am - 11:41 amFLL-ISP
2h 51mnonstop
$157JetBlue
Find Deal
Sat, Aug 30 - Tue, Sep 2
Southwest Logo
6:05 am - 11:40 amISP-PBI
5h 35m1 stop
Southwest Logo
4:20 pm - 7:00 pmPBI-ISP
2h 40mnonstop
$167Southwest
Find Deal
Fri, Sep 12 - Mon, Sep 15
 Logo
2:25 pm - 11:09 pmISP-MCO
8h 44m1 stop
 Logo
8:00 am - 10:37 amMCO-ISP
2h 37mnonstop
Mon, Sep 22 - Sun, Sep 28
 Logo
2:25 pm - 11:09 pmISP-MCO
8h 44m1 stop
 Logo
8:00 am - 10:37 amMCO-ISP
2h 37mnonstop
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 $1,177.

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 $277, prices are generally cheapest when you fly direct.


Good to know

Low seasonSeptember
High seasonApril
Cheapest flight$41
Best time to beat the crowds with an average 5% drop in price.
Most popular time to fly with an average 6% increase in price.
Flight from Islip to Charleston

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 $187 one-way - $324 round-trip; Orlando $96 one-way - $145 round-trip; West Palm Beach $139 one-way - $201 round-trip

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 178 reviews
6.7Food
8.3Boarding
6.6Entertainment
8.2Comfort
8.8Crew
Airline reviews

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

10.0 ExcellentAnonymous, Jun 2025MCO - SBN
Read more Breeze Airways reviews

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!

Great experience! This was my first time flying with them and I could not have been happier.

Airplane was newer and very clean, lots of space. Crew was great. There was no food and entertainment but that was expected so not an issue.

Southwest is typically delayed, and it gets wearisome. It is no longer a discount airline and you get way less than you pay for when it comes to comfort and Ce.

We sat on the plane on the tarmac for 4 hours.

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

Flight crew and cabin crew were great. I had to rearrange flights because my original flight was 3hrs delayed for weather, the rub is the flight I moved to boarded on time then we sat at the gate for 2 hours because scheduling stole our first officer for another flight, TWICE. Then our actual FO was an hour delayed. To make it worse my original flight went from a 3 hour delay to departing 15min EARLY. Just poor scheduling operations all around.

Bring back peanuts Take our drink orders when were all seated, especially after you switch to assigned seating.

Staff was far less than helpful at all times. Departure and arrival times mean nothing to Southwest. Extremely disappointed, will never fly with them again, and I’ll be sure to share my experience with all.

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

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

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

Boarding was a breeze, however, two of the flights that I boarded with Spirit did not have Wi-Fi available.

Seats uncomfortable, hard to check luggage, etc. It was like the last flight out of Hanoi

Need screens for tv/movies. Seats are more cramped than any other airlines. Seats are hard. They don’t recline. And in flight time should not be used for sales pitches.

Good experience except for the drunk woman who was with a child. Sad

The ease of booking the flight was very good. Speaking with customer service was also good. However, the crew people are unfriendly and unwelcoming which I found this as unprofessional. As far as comfort it was mediocre. This was my first time flying Spirit and I chose them because of the flight times met my needs and my budget. However, I would be reluctant to fly on Spirit again. In addition, if the crew were more friendly and at least appeared somewhat happy and welcoming personally it would probably make the experience of flying with Spirit better.

Tell them to chose a better, less bumpy route :( my seat had no window all the way at the end 😔

Seats too hard, too much lumbar. Space between rows was extremely tight, so tight hard to place item under seat in front of me. No tv screens. Zero plugs for charging phones. Too many sales pitches

Prepaid for 1 bag but my prior airline did not provide it to me in time to check it with Spirit and I could not get my $75 refunded.

Plane delayed which seems to be the norm with spirt. Everything is an up charge. I had to pay an additional fee because I was late getting back to my car. Will never fly spirit again

It was horrible. We were not allowed on the flight by spirit staff at the gate during boarding because I had a guitar. The same guitar I had at check in which I paid for and they said I can take it on the plane. We missed our flight, lost our luggage, and had to pay another $900 to rebook flights. Worst travel experience ever and spirit staff are the worst staff ever.

Book with frontier airlines with the mentality that they'll cancel your flight, kick you off and lose your luggage. Anything besides that is a win. Compare prices with other airlines (to include luggage) and if frontier is still worth it, book it but know all of their policies.

You get what you pay for nothing essentially but a hard uncomfortable seat that doesn’t recline and kids screaming all around you and chaotic boarding and limited check bag weight allowance when compared to other airlines

I never got to experience the flight because they delayed my first flight and I missed this one. Then Frontier didn't want to help me rebook a flight to get me to my final destination.

The Boarding process in Denver was chaotic, and since the line was so long, we were lined up very far from the gate. If there were any announcements from the gate staff, we didn't hear them. The flight attendants were spectacular. The only negative part of the flight was sitting by a 2 1/2 year old who was unruly and unfortunately had parents that matched his behaviors. Also, the restaurants in Denver on the E concourse, they didn't have food (passengers could only order 1 item on the entire menu) or the restaurants had 12-14 people waiting for orders to be prepared and another 6 people waiting to order. If you have a layover in Denver and need to grab food, be prepared to visit the shops with pre-packaged sandwiches, or you can visit another concourse but it may take a while to transit throughout the airport.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

Although an hour and a half early was told by staff at check in they had overbooked and could not check us in for the flight.

The crew was delayed because they came on another flight that was delayed due to weather 10pm flight left at 1.30 am The airline made no effort to align alternate crew

Plane was down graded and I lost my uncharged exit row with more leg room. No mention or offer of refund from podium. Flight attendant was nice to explain this happens often and that I could request a refund via online form submission. I did this and have heard nothing back.

Worst airline experience. They were rude and kept changing our seats and/or giving our seats away so our family didn’t get to sit with each other. Almost everyone we dealt with at both airports with this airline was rude. The app kept giving us wrong information making things take longer. Dealing with them before TSA can take close to an hour…longer than I’ve ever had to deal with before. Never using this airline again.

Horrendous. I do not recommend Frontier. The passengers lack manners and decency, and the flight attendants lack professionalism. If I wasn’t in a bind to fly with 48 hours notice for a job interview, I would not have selected a flight with Frontier and I never plan to fly with them in the future.

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