$130 Find Cheap Flights from Islip to Houston - Compare and Save

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Everything you should know

Cheapest round-trip
$327
Typical prices: $300-$616
Multiple Airlines
Sat 1/27Wed 1/31
ISP - IAH • 1 stop
Cheapest one-way
$130
Typical prices: $177-$344
Frontier
Thu 11/22
ISP - IAH • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Islip and Houston. You'll need to take a connecting flight to reach the destination.
Insights
Insights
Top routes
ISP - IAH
Cheapest • 10% average savings
ISP - HOU
Most popular
Insights
Insights
When to travel
February
Cheapest • 57% price drop
April
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Tampa (TPA)
Cheapest • Avg $316 (round-trip)
Baltimore/Washington (BWI)
Shortest trip • 5h 38m (one-way)
Insights
Insights
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Flight Deals

Cheap Flights from Islip to Houston (ISP-HOU)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Islip to Houston

Wed, Jan 27 - Sun, Jan 31
Multiple Airlines Logo
9:40 am - 8:05 amISP  Islip Long Island-IAH Houston George Bush Intcntl
23h 25m1 stop Tampa
Multiple Airlines Logo
3:50 pm - 2:22 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
21h 32m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham
$327Multiple Airlines
Wed, Jan 27 - Sun, Jan 31
Southwest Logo
3:25 pm - 9:05 pmISP  Islip Long Island-HOU Houston Hobby
6h 40m1 stop Baltimore/Washington
Southwest Logo
7:45 am - 4:45 pmHOU  Houston Hobby-ISP Islip Long Island
8h 00m1 stop Baltimore/Washington
$332Southwest
Wed, Jan 27 - Sun, Jan 31
Southwest Logo
3:25 pm - 9:05 pmISP  Islip Long Island-HOU Houston Hobby
6h 40m1 stop Baltimore/Washington
Southwest Logo
2:20 pm - 11:40 pmHOU  Houston Hobby-ISP Islip Long Island
8h 20m2 stops Atlanta Hartsfield-Jackson Baltimore/Washington
$337Southwest
Wed, Jan 27 - Sun, Jan 31
Southwest Logo
12:30 pm - 7:35 pmISP  Islip Long Island-HOU Houston Hobby
8h 05m2 stops Baltimore/Washington Nashville Intl
Southwest Logo
9:40 am - 4:45 pmHOU  Houston Hobby-ISP Islip Long Island
6h 05m2 stops Memphis Baltimore/Washington
$342Southwest
Fri, Nov 20 - Mon, Nov 23
Frontier Logo
4:40 pm - 12:25 amISP  Islip Long Island-IAH Houston George Bush Intcntl
8h 45m1 stop Orlando
Frontier Logo
5:01 am - 3:45 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
9h 44m1 stop Orlando
$360Frontier
Tue, Nov 17 - Thu, Nov 19
Multiple Airlines Logo
6:00 am - 10:59 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
17h 59m1 stop Fort Lauderdale
Multiple Airlines Logo
8:35 pm - 3:45 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
18h 10m1 stop Orlando
$390Multiple Airlines
Tue, Nov 17 - Tue, Nov 24
Multiple Airlines Logo
6:00 am - 10:59 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
17h 59m1 stop Fort Lauderdale
Multiple Airlines Logo
3:52 pm - 3:45 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
22h 53m1 stop Orlando
$411Multiple Airlines
Tue, Nov 17 - Thu, Nov 19
Multiple Airlines Logo
2:28 pm - 10:59 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
33h 31m2 stops Orlando Fort Lauderdale
Multiple Airlines Logo
12:27 pm - 3:45 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
26h 18m1 stop Orlando
$427Multiple Airlines
Sat, Feb 13 - Sun, Feb 21
Southwest Logo
3:50 pm - 10:00 pmISP  Islip Long Island-HOU Houston Hobby
7h 10m1 stop Baltimore/Washington
Southwest Logo
7:40 pm - 10:10 amHOU  Houston Hobby-ISP Islip Long Island
13h 30m2 stops Orlando Baltimore/Washington
$447Southwest
Wed, Jan 27 - Sun, Jan 31
Multiple Airlines Logo
9:40 am - 8:05 amISP  Islip Long Island-IAH Houston George Bush Intcntl
23h 25m1 stop Tampa
Multiple Airlines Logo
5:01 am - 11:04 amIAH  Houston George Bush Intcntl-ISP Islip Long Island
29h 03m1 stop Orlando
$448Multiple Airlines
Booking Insights

Price, demand and travel trends for Islip to Houston flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Which airline is the cheapest to fly from Islip to Houston?

Southwest ($332) and Frontier ($360) are the cheapest airlines to fly round-trip from Islip to Houston according to KAYAK data over the last 5 days.

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Key details for Islip to Houston flights

Low season

October

Cheapest flight

$130
Beat the crowds with an average 69% drop in travelers.
The most popular month to fly with an average 25% increase in travelers.
One-way flight from Islip to Houston George Bush Intcntl Airport

When to book flights from Islip to Houston

Are your dates flexible? Find out the best times to travel from Islip to Houston based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Islip to Houston flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Islip to Houston?

    Only Economy Class is available on flights from Islip to Houston.

  • How long is a flight from Islip to Houston?

    A nonstop flight from Islip to Houston takes 00m, covering 1,462 miles.

  • Do I need a passport to fly from Islip to Houston?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Islip to Houston flight?

    Round-trip flights from Islip to Houston range from $300 to $616, with an average of $422 over the past 12 months. Anything below $300 counts as a good deal.

  • Have flight prices from Islip to Houston changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $327 to $1,504. That means the highest observed fare was about 5x higher than the lowest one.

  • How are flight prices from Islip to Houston looking right now?

    One-way fares from Islip to Houston are currently higher than usual. Average one-way flight prices are about $267, which is 10% above the typical average for this route.

  • What car rental options are available in Houston?

    Since Houston is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Houston George Bush Intcntl Airport (IAH) — daily rates averaging $40:

    • ACO Rent A Car
    • Easirent
    • America Car Rental
    • Thrifty
    • Hertz

    Near Houston Hobby Airport (HOU) — daily rates averaging $69:

    • Thrifty
    • Dollar
    • Alamo
    • Hertz
    • Ace

  • Which airports can I use when flying from Islip to Houston?

    Flights from Islip to Houston usually depart from Islip Long Island (ISP) and may arrive at several airports in Houston area, including Houston Hobby (HOU) and Houston George Bush Intcntl (IAH).

  • Which airports do connecting flights from Islip to Houston pass through?

    One-stop flights from Islip to Houston most commonly connect through:

    • Baltimore/Washington (BWI) - 54% of one-stop connections
    • Orlando (MCO) - 38% of one-stop connections
    • Tampa (TPA) - 8% of one-stop connections

  • Can I save money by using flexible dates for flights from Islip to Houston?

    Yes. Flexible dates can save you up to 62% on flights from Islip to Houston. Monday is the cheapest departure day at $316 round-trip on average, while Friday is the most expensive at $812, a difference of $496.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Islip to Houston?

    Flying via Baltimore/Washington (BWI) gives the shortest average 1-stop total travel time at 5h 38m, compared with 10h 08m via Tampa (TPA) and 12h 01m via Orlando (MCO).

  • What is the time difference between Islip and Houston?

    Houston is 1 hour behind Islip (Central Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Houston?

    Some of the most popular sights in Houston are George R. Brown Convention Center, Daikin Park and Houston Stadium. These are among the most viewed places in Houston on KAYAK.

Your guide to booking Islip to Houston flights

Get tips on when to book, when to fly and what to know before your trip.

More options for your flight from Islip to Houston

Complete your trip to Houston with a hotel stay or car rental

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