ISP

$98 Find Cheap Flights from Houston to Islip

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Houston to Islip departing on 9/2. 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 Islip

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Houston to Islip, 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 Houston to Islip, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Houston to Islip

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

Tue, Aug 12 - Sat, Aug 16
Frontier Logo
8:56 pm - 7:52 pmIAH-ISP
21h 56m1 stop
Frontier Logo
2:05 pm - 1:40 pmISP-IAH
24h 35m1 stop
$227Frontier
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Tue, Oct 14 - Sun, Oct 19
Frontier Logo
8:56 pm - 10:37 amIAH-ISP
12h 41m1 stop
Frontier Logo
9:39 am - 4:43 pmISP-IAH
8h 04m1 stop
$228Frontier
Find Deal
Tue, Aug 19 - Fri, Aug 22
Frontier Logo
4:43 pm - 11:59 pmIAH-ISP
6h 16m1 stop
Frontier Logo
9:58 am - 3:45 pmISP-IAH
6h 47m1 stop
$234Frontier
Find Deal
Wed, Oct 8 - Sun, Oct 12
Frontier Logo
8:56 pm - 7:53 pmIAH-ISP
21h 57m1 stop
Frontier Logo
9:39 am - 4:43 pmISP-IAH
8h 04m1 stop
$235Frontier
Find Deal
Tue, Aug 19 - Fri, Aug 22
Frontier Logo
4:43 pm - 11:59 pmIAH-ISP
6h 16m1 stop
Frontier Logo
9:58 am - 3:45 pmISP-IAH
6h 47m1 stop
$236Frontier
Find Deal
Sat, Oct 11 - Sat, Oct 18
Southwest Logo
2:20 pm - 9:35 pmHOU-ISP
6h 15m2 stops
Southwest Logo
3:10 pm - 7:30 pmISP-HOU
5h 20m1 stop
$242Southwest
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Sat, Oct 11 - Sat, Oct 18
Southwest Logo
2:20 pm - 9:35 pmHOU-ISP
6h 15m2 stops
Southwest Logo
11:55 am - 8:00 pmISP-HOU
9h 05m2 stops
$247Southwest
Find Deal
Wed, Aug 27 - Wed, Sep 3
Southwest Logo
5:55 am - 11:55 amHOU-ISP
5h 00m1 stop
Southwest Logo
4:00 pm - 10:35 pmISP-HOU
7h 35m1 stop
$258Southwest
Find Deal
Wed, Aug 27 - Wed, Sep 3
Southwest Logo
5:55 am - 11:55 amHOU-ISP
5h 00m1 stop
Southwest Logo
6:05 am - 2:25 pmISP-HOU
9h 20m2 stops
$263Southwest
Find Deal
Thu, Aug 28 - Thu, Sep 4
Logo
5:45 am - 6:38 pmIAH-ISP
11h 53m1 stop
Logo
11:45 am - 10:25 pmISP-IAH
11h 40m2 stops
$371
Find Deal
Booking Insights

KAYAK's insights & trends for Houston to Islip flights

Get data-powered insights and trends into flights from Houston to Islip 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 Houston to Islip?

The average price of all round-trip flights from Houston to Islip clicked on KAYAK for each day over the last 12 months.

When flying from Houston to Islip, you should consider leaving on a Thursday and avoid Tuesdays if you are looking for the best rates. For your return to Houston, you’ll find the best rates on Saturdays and the most expensive ones on Thursdays.

Find deals

Good to know

Cheapest flight$98
Flight from Houston George Bush Airport to Islip

When to book flights from Houston to Islip

Are your dates flexible? Find out the best times to travel from Houston to Islip 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 Houston to Islip

  • What is the cheapest flight from Houston to Islip?

    In the last 3 days, the lowest price for a flight from Houston to Islip was $98 for a one-way ticket and $227 for a round-trip.

  • Do I need a passport to fly between Houston and Islip?

    A passport is required to fly from Houston to Islip.

  • Which airports will I be using when flying from Houston to Islip?

    On your way to Islip, you’ll fly out from one of these Houston airports: Houston Hobby or Houston George Bush Intcntl. You’ll be landing at Islip Long Island.

  • Which aircraft models fly most regularly from Houston to Islip?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Houston to Islip?

    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 Houston to Islip.

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

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

    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 Islip with an airline and back to Houston with another airline.

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

    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 Islip from Houston 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 Houston to Islip

 
See real verified KAYAK customer reviews for airlines flying from Houston to Islip. 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 Houston to Islip? 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
7.0Food
8.1Boarding
8.0Comfort
8.6Crew
7.5Entertainment
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.

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

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.

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

Plz don't take away free bags and free seating

My flight to Chicago left and landed early. My return flight left two minutes late and arrived 2 minutes late. My seat selections were ideal! There were no snacks going to Chicago and no snacks on the return trip. There are no charging outlets on board.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Everything you need to know for your flight from Houston to Islip

Information on your arrival and departure airports

Islip (ISP)

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