$31 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 10/7. 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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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$187
Las Vegas
Las Vegas1 stop$181
Miami
Miami1 stop$215
San Francisco
San Francisco2 stops$248
Boston
Boston1 stop$175
Washington, D.C.
Baltimore1 stop$163
Denver
Denver1 stop$169
Seattle
Seattle2 stops$341
Fort Lauderdale
Fort Lauderdale1 stop$144
Atlanta
Atlanta1 stop$148
Tampa
Tampanonstop$75
Houston
Houston1 stop$157
Honolulu
Honolulu2 stops$898
San Diego
San Diego2 stops$289
Philadelphia
Philadelphia1 stop$161
Los Angeles
Los Angeles1 stop$187
Las Vegas
Las Vegas1 stop$181
Miami
Miami1 stop$215
San Francisco
San Francisco2 stops$248
Boston
Boston1 stop$175
Washington, D.C.
Baltimore1 stop$163
Denver
Denver1 stop$169
Seattle
Seattle2 stops$341
Fort Lauderdale
Fort Lauderdale1 stop$144
Atlanta
Atlanta1 stop$148
Tampa
Tampanonstop$75
Houston
Houston1 stop$157
Honolulu
Honolulu2 stops$898
San Diego
San Diego2 stops$289
Philadelphia
Philadelphia1 stop$161

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

Wed, Sep 10 - Sat, Sep 13
Frontier Logo
11:35 am - 2:32 pmISP-MCO
2h 57mnonstop
Frontier Logo
8:15 am - 10:55 amMCO-ISP
2h 40mnonstop
$53Frontier
Find Deal
Tue, Sep 9 - Sat, Sep 13
Frontier Logo
11:25 am - 2:22 pmISP-MCO
2h 57mnonstop
Frontier Logo
8:15 am - 10:55 amMCO-ISP
2h 40mnonstop
$54Frontier
Find Deal
Thu, Oct 9 - Thu, Oct 16
Breeze Airways Logo
11:40 am - 4:00 pmISP-TPA
4h 20m1 stop
Breeze Airways Logo
7:00 am - 11:00 amTPA-ISP
4h 00m1 stop
$94Breeze Airways
Find Deal
Thu, Sep 4 - Sun, Sep 7
Southwest Logo
6:25 am - 9:10 amISP-MCO
2h 45mnonstop
Southwest Logo
11:20 am - 1:55 pmMCO-ISP
2h 35mnonstop
$105Southwest
Find Deal
Fri, Nov 7 - Mon, Nov 10
Breeze Airways Logo
2:25 pm - 4:04 pmISP-RDU
1h 39mnonstop
Breeze Airways Logo
12:13 pm - 1:45 pmRDU-ISP
1h 32mnonstop
$108Breeze Airways
Find Deal
Sat, Sep 13 - Sat, Sep 20
Southwest Logo
3:40 pm - 6:30 pmISP-MCO
2h 50mnonstop
Southwest Logo
3:50 pm - 9:40 pmMCO-ISP
5h 50m1 stop
$115Southwest
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Wed, Jan 7 - Sat, Jan 17
JetBlue Logo
11:15 am - 2:07 pmISP-TPA
2h 52mnonstop
JetBlue Logo
3:00 pm - 5:37 pmTPA-ISP
2h 37mnonstop
$117JetBlue
Find Deal
Wed, Jan 21 - Wed, Feb 11
JetBlue Logo
11:15 am - 2:07 pmISP-TPA
2h 52mnonstop
JetBlue Logo
3:00 pm - 5:37 pmTPA-ISP
2h 37mnonstop
$137JetBlue
Find Deal
Tue, Sep 30 - Fri, Oct 3
Cape Air Logo
7:30 am - 8:57 amISP-BOS
1h 27mnonstop
Cape Air Logo
1:50 pm - 3:21 pmBOS-ISP
1h 31mnonstop
$390Cape Air
Find Deal
Tue, Sep 9 - Tue, Sep 16
Cape Air Logo
4:33 pm - 6:00 pmISP-BOS
1h 27mnonstop
Cape Air Logo
6:30 pm - 8:01 pmBOS-ISP
1h 31mnonstop
$406Cape Air
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 $97 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 $97.

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 $241, prices are generally cheapest when you fly direct.

Good to know

Low seasonSeptember
Cheapest flight$31
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Islip to Orlando

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 $179 one-way - $351 round-trip; Orlando $89 one-way - $155 round-trip; Tampa $109 one-way - $176 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.
8.0
SouthwestOverall score based on 4244 reviews
8.1Boarding
7.5Entertainment
8.0Comfort
7.0Food
8.6Crew
Airline reviews

Southwest's seats are the least comfortable I have ever sat in.

4.0 OkayDavid, Aug 2025DTW - STL
Read more Southwest reviews

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Other than a bit of a delay, everything was good. Again, the boarding process and picking seats is the only thing I don't enjoy.

If we are going to have to pay for luggage, make it easier to do. Put something on the app during check-in so I don't need to do it at the kiosk. I've done it twice recently and I ended up having to pay at the desk because something went wrong at the kiosk in Tampa.

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

Head rest did not move, very uncomfortable. Staff was great. There was no entertainment, would be nice not to have to pay for snack.

Worst airline - on our flight down from MCO to EYW, there was a huuuuuge delay. We were supposed to take off 12p and it was pushed back to almost 2:30p. We boarded the plane and then sat on the tarmac forever because we were "over" weight and had to burn fuel. Rather than ask guests to volunteer and leave, they kept us on the plane. Finally a family decided to off board and take their luggage with them. Shortly after, we left the terminal but then the pilot told us we may have to sit at the end of the runway for 15-20mins to burn more fuel. Which we ended up doing and of course it started to rain. We finally took off 2:50p. We were supposed to land 1p and didn't land until 3:45p. Basically had time to scramble off the plane, grab our luggage, request transportation to our hotel, unpack, rinse off and hustle over to our 6:30p dinner ressy. It's a shame Breeze is the only non-stop airline from MCO to EYW. For this, not sure I'd ever go back to EYW - most def will not take Breeze again.

Flight was rescheduled from (originally) early Saturday departure to a late Sunday departure. Then the late Sunday departure was delayed again (weather) and got in very late. We’ve enjoyed Breeze a lot, but this particular experience was a little disappointing.

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.

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.

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.

The flight was delayed be over 3 hours. I tried to get a refund for Vivian Kirby and my session kept being stopped. I was NEVER able to finish the prosses...after 2 hours of attempting.

My experience with Spirit was good, but the experience with Kayak was not. Based on the Spirit agent Kayak added an additional charge after purchasing the tickets. When I buy the tickets I paid the total amount and I only pay once. This time they added an additional charge because based on Spirit they partially charge the tickets and I still needed to pay a second time. This is not good at all and Unprofessional

Spirit gets such a bad rap. I have never had a bad experience with them and the crew is always friendly and funny. This trip I had knee replacement surgery surgery 10 weeks ago. It is still a little rough to get get from point a to point b. And Spirit was on top of it. When there was a seat available the stewardess asked me if I wanted to move to an open seat so I could elevate my leg on the empty seat? 5 stars all around. They helped me on and helped me off the plane. I can’t say enough about the crew!!

We liked the woman who worked our gate and waited with us for our plane. We changed gates 3 times. Our flight was supposed to leave at 11:28am. We actually left after 5pm. It was not a good situation. This delay cost us a lot of money.

Unbelievable check in horrible. Asked to print tickets at the gate after a delay

For the minimalist experience, it is really a great ride-- feels a little like public transport i guess

I didn’t mind being delayed due to weather, but continuing to post (and not update) that we would be delayed until after the flight was already supposed to have taken off was a bit much. In the future, please announce the delay even if the time is still unknown.

I think the staff was nice. They took time to explain safety protocols. Boarding was great. They started early and our flight left a little early which was convenient. Having free games to play would have been better

I didn't order food. I requested a Tomato juice and was given a boody mary mix. The serve needs to warn the customer what their given. It wasn't a huge deal, but I wasted $4.50.

This gate agents are always so rude! I stopped flirting with spirit years ago for that reason I thought it would change by now. It’s so tacky they try to treat you like a school child i hate it

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Disaster. They lied every step of the way. We ended up being delayed due to crew and then allegedly abandoned the flight because of a curfew at LGA. No rebooking to LGA at any reasonable time. No hotel. No meal vouchers. Had to sleep in the airport and fly to Newark instead. Will never fly Frontier again.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

After boarding and un-boarding twice over 6+hours, the flight was canceled.

Severe turbulence. Captain never came on to reassure passengers after things settled down.

My first flight was delayed 5 hours. The 2nd flight was canceled til the next day and the never even tried to compensate for it. Worse I was delayed again on the flight the rebooked me on.

Boarding in Orlando was not good. Giant mob at the gate, should have been lines.

The worst. They don’t follow procedure for boarding per group. Flight got delayed for no understandably reasons, they changed our destination from PR to Miami, left us inside a plane for more than 8 hours, then cancelled flight in Miami leaving us stranded. Poorly managed re-accommodation for a new flight and overnight stay so I have to spend in a new ticket and my own hotel room to been able to get to my office next day. Lost 2 days of work and as a doctor, patients loosing their appointments. to other flights and besides

Decent clean onboard experience. Okay discount airline experience. Unfortunately, any customer service interactions are difficult and unhelpful. There is no service. Also, a premium seat only gets you premium boarding if you line up first. Once they start general boarding you must go to the back of the line. Not very premium

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