$119 Cheap Flights from Islip (ISP) to Houston (IAH)

View $119 flight on Thu, Aug 28, 2025Opens in a new window

Popular airlines from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH)

Cheap Flights from Islip to Houston (ISP-IAH)

Prices were available within the past 7 days and start at $119 for one-way flights and $304 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Wed, Jul 30 - Tue, Aug 5
ISP
Islip
IAH
Houston
$304 Roundtrip, found 22 hours ago
$304
Roundtrip
found 22 hours ago
Select Frontier Airlines flight, departing Wed, Jul 30 from Islip to Houston, returning Tue, Aug 5, priced at $304 found 22 hours ago
Frontier Airlines
Sat, Jul 19 - Wed, Jul 23
ISP
Islip
IAH
Houston
$315 Roundtrip, just found
$315
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Jul 19 from Islip to Houston, returning Wed, Jul 23, priced at $315 just found
Frontier Airlines
Sun, Oct 5 - Sun, Oct 12
ISP
Islip
IAH
Houston
$323 Roundtrip, found 3 days ago
$323
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Sun, Oct 5 from Islip to Houston, returning Sun, Oct 12, priced at $323 found 3 days ago
Frontier Airlines
Sat, Jul 19 - Sun, Jul 20
ISP
Islip
IAH
Houston
$326 Roundtrip, just found
$326
Roundtrip
just found
Select Frontier Airlines flight, departing Sat, Jul 19 from Islip to Houston, returning Sun, Jul 20, priced at $326 just found
Frontier Airlines
Fri, Sep 5 - Sat, Sep 6
ISP
Islip
IAH
Houston
$344 Roundtrip, found 12 hours ago
$344
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Fri, Sep 5 from Islip to Houston, returning Sat, Sep 6, priced at $344 found 12 hours ago
Frontier Airlines
Wed, Aug 6 - Wed, Aug 27
ISP
Islip
IAH
Houston
$350 Roundtrip, found 1 day ago
$350
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Aug 6 from Islip to Houston, returning Wed, Aug 27, priced at $350 found 1 day ago
Frontier Airlines
Sat, Jul 12 - Tue, Jul 15
ISP
Islip
IAH
Houston
$355 Roundtrip, found 2 days ago
$355
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Sat, Jul 12 from Islip to Houston, returning Tue, Jul 15, priced at $355 found 2 days ago
Frontier Airlines
Fri, Sep 12 - Sun, Sep 14
ISP
Islip
IAH
Houston
$358 Roundtrip, found 1 day ago
$358
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Sep 12 from Islip to Houston, returning Sun, Sep 14, priced at $358 found 1 day ago
Frontier Airlines
Fri, Oct 24 - Sun, Oct 26
ISP
Islip
IAH
Houston
$359 Roundtrip, found 1 day ago
$359
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 24 from Islip to Houston, returning Sun, Oct 26, priced at $359 found 1 day ago
JetBlue Airways
Fri, Jul 25 - Mon, Jul 28
ISP
Islip
IAH
Houston
$890 Roundtrip, found 20 hours ago
$890
Roundtrip
found 20 hours ago
Select JetBlue Airways flight, departing Fri, Jul 25 from Islip to Houston, returning Mon, Jul 28, priced at $890 found 20 hours ago

Alternative airports near Houston

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to George Bush Intercontinental IAH. Cheapest option available. Average driving time to city center is 24 minutes. Flights from $413
IAH
George Bush Intercontinental
Cheapest
Average driving time to city center24 min
Flights from $413
Flights from Islip (ISP) to Houston (IAH)
Origin airport
MacArthur
Destination airport
George Bush Intercontinental
Airlines serving
Frontier Airlines, JetBlue Airways
Roundtrip price
$304
Distance
1452 mi

Islip to Houston Flights

The cheapest times to fly from Islip to Houston

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Islip to Houston are during the month of July. You can find some of the cheapest flights from Islip to Houston with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Islip to Houston

Sunday is one of the best days to book for cheap flights from Islip to Houston: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Islip to Houston

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Islip to Houston in 2025. You can also book with separate airlines for your outbound and return journeys, from $119 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Islip to Houston flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Islip to Houston airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH) cost?
Discover the latest flight deals from ISP to IAH by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from ISP to IAH?
The cheapest flights from ISP to IAH are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH)?
You can't fly nonstop to George Bush Intercontinental Airport (IAH) from Islip, NY (ISP-MacArthur). However, you can easily reach Houston without any layovers by leaving from John F. Kennedy Intl. Airport (JFK).
What is the cheapest airline that flies from ISP to IAH?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from ISP to IAH. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH)?
You'll need to catch a flight with a layover when traveling from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from ISP to IAH?
Generally you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH)?
To reach George Bush Intercontinental Airport (IAH) on time, book a flight that leaves MacArthur Airport (ISP) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH) last-minute?
Waiting until right before your break to book a flight from ISP to IAH generally means paying more. Although you may find some last-minute offers, they aren't always guaranteed. Keep your travel schedule open for a better chance of getting a bargain.
Is it cheaper to book an ISP to IAH flight and hotel package?
Compared with arranging hotels and flights separately, booking an ISP to IAH flight and hotel package with Expedia could result in significant savings. Better still, having everything in one convenient place will take the stress out of planning your trip. Simply pick your flights and select from our extensive range of hotels, then personalize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH)?
In most cases, you can modify or cancel your ISP to IAH flight. However, there may be additional charges, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you need more information, go to our Customer Service portal.

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*Available to One Key members.