$119 Find Cheap Flights from Islip to Houston - Compare and Save

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Everything you should know

Cheapest round-trip
$254
Typical prices: $317-$758
Multiple Airlines
Wed 10/31Thu 11/1
ISP - IAH • 1 stop
Cheapest one-way
$119
Typical prices: $172-$369
Frontier
Fri 10/19
ISP - IAH • 2 stops
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 - HOU
Cheapest • 26% average savings
ISP - IAH
Most popular
Insights
Insights
When to travel
February
Cheapest • 62% 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 47m (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

Sat, Oct 31 - Sun, Nov 1
Multiple Airlines Logo
12:00 pm - 7:40 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
8h 40m1 stop Raleigh-Durham
Multiple Airlines Logo
8:35 pm - 5:56 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
20h 21m1 stop Orlando
$254Multiple Airlines
Sat, Oct 31 - Mon, Nov 2
Multiple Airlines Logo
12:00 pm - 7:40 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
8h 40m1 stop Raleigh-Durham
Multiple Airlines Logo
9:14 pm - 11:20 amIAH  Houston George Bush Intcntl-ISP Islip Long Island
37h 06m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham
$255Multiple Airlines
Sat, Oct 31 - Sun, Nov 1
Multiple Airlines Logo
12:00 pm - 9:53 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
10h 53m2 stops Raleigh-Durham Atlanta Hartsfield-Jackson
Multiple Airlines Logo
8:35 pm - 5:56 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
20h 21m1 stop Orlando
$263Multiple Airlines
Sat, Oct 31 - Mon, Nov 2
Multiple Airlines Logo
12:00 pm - 7:40 pmISP  Islip Long Island-IAH Houston George Bush Intcntl
8h 40m1 stop Raleigh-Durham
Multiple Airlines Logo
10:12 am - 11:20 amIAH  Houston George Bush Intcntl-ISP Islip Long Island
24h 08m1 stop Raleigh-Durham
$270Multiple Airlines
Wed, Oct 14 - Wed, Oct 21
Multiple Airlines Logo
12:00 pm - 7:19 amISP  Islip Long Island-IAH Houston George Bush Intcntl
20h 19m2 stops Raleigh-Durham Atlanta Hartsfield-Jackson
Multiple Airlines Logo
4:21 pm - 5:30 pmIAH  Houston George Bush Intcntl-ISP Islip Long Island
24h 09m1 stop Orlando
$296Multiple Airlines
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
$305Frontier
Fri, Nov 20 - Fri, Nov 27
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
$306Frontier
Fri, Jan 15 - Sat, Jan 23
Southwest Logo
1:00 pm - 6:55 pmISP  Islip Long Island-HOU Houston Hobby
6h 55m1 stop Orlando
Southwest Logo
6:00 am - 12:00 pmHOU  Houston Hobby-ISP Islip Long Island
5h 00m1 stop Baltimore/Washington
$313Southwest
Fri, Jan 15 - Sat, Jan 23
Southwest Logo
1:00 pm - 6:55 pmISP  Islip Long Island-HOU Houston Hobby
6h 55m1 stop Orlando
Southwest Logo
1:35 pm - 10:20 pmHOU  Houston Hobby-ISP Islip Long Island
7h 45m2 stops Chicago Midway Baltimore/Washington
$319Southwest
Fri, Nov 20 - Fri, Nov 27
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
$329Frontier
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 from Islip to Houston with more confidence.

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

Frontier ($305) and Southwest ($313) 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

July

Cheapest flight

$119
Best time to beat the crowds but there is an average 68% increase in price.
Most popular time to fly and prices are also 34% lower on average.
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 route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • 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).

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

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

  • 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) - 64% of one-stop connections
    • Orlando (MCO) - 29% of one-stop connections
    • Tampa (TPA) - 7% of one-stop connections

    Baltimore/Washington (BWI) handles the largest share of one-stop connections on this route.

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

    Yes. Being flexible with your travel dates can save you up to 56% on the Islip to Houston route. Monday is the cheapest departure day at $316 round-trip on average, while Friday is the most expensive at $718, a difference of $402. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • 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.

  • How long is a flight from Islip to Houston?

    A nonstop flight from Islip to Houston takes 0h 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 are flight prices from Islip to Houston looking right now?

    One-way fares from Islip to Houston are currently in line with typical prices for this route. Average one-way fares are about $242.

  • 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 47m, compared with 10h 08m via Tampa (TPA) and 12h 15m 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 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 from around $3:

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

    Near Houston Hobby Airport (HOU) — daily rates from around $20:

    • Thrifty
    • Dollar
    • Alamo
    • Hertz
    • Budget

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

    Round-trip flights from Islip to Houston range from $317 to $758, with an average of $482 over the past 12 months. Anything below $317 counts as a good deal.

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

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