$91 Cheap Flights from Islip (ISP) to Houston (IAH)

View $91 flight on Mon, Dec 15, 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 $91 for one-way flights and $170 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Oct 30 - Wed, Nov 19
ISP
Islip
IAH
Houston
$170 Roundtrip, found 9 hours ago
$170
Roundtrip
found 9 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Houston, returning Wed, Nov 19, priced at $170 found 9 hours ago
Frontier Airlines
Thu, Oct 30 - Tue, Nov 4
ISP
Islip
IAH
Houston
$180 Roundtrip, found 6 hours ago
$180
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Houston, returning Tue, Nov 4, priced at $180 found 6 hours ago
Frontier Airlines
Thu, Oct 23 - Thu, Oct 30
ISP
Islip
IAH
Houston
$188 Roundtrip, found 5 days ago
$188
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Thu, Oct 23 from Islip to Houston, returning Thu, Oct 30, priced at $188 found 5 days ago
Frontier Airlines
Thu, Oct 30 - Tue, Nov 4
ISP
Islip
IAH
Houston
$206 Roundtrip, found 6 hours ago
$206
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Houston, returning Tue, Nov 4, priced at $206 found 6 hours ago
Frontier Airlines
Tue, Nov 11 - Wed, Nov 19
ISP
Islip
IAH
Houston
$211 Roundtrip, found 5 days ago
$211
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Tue, Nov 11 from Islip to Houston, returning Wed, Nov 19, priced at $211 found 5 days ago
Frontier Airlines
Thu, Oct 30 - Tue, Nov 18
ISP
Islip
IAH
Houston
$220 Roundtrip, found 8 hours ago
$220
Roundtrip
found 8 hours ago
Select Frontier Airlines flight, departing Thu, Oct 30 from Islip to Houston, returning Tue, Nov 18, priced at $220 found 8 hours ago
Frontier Airlines
Sun, Nov 9 - Thu, Nov 13
ISP
Islip
IAH
Houston
$222 Roundtrip, found 4 days ago
$222
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sun, Nov 9 from Islip to Houston, returning Thu, Nov 13, priced at $222 found 4 days ago
Frontier Airlines
Tue, Dec 2 - Tue, Dec 16
ISP
Islip
IAH
Houston
$231 Roundtrip, found 1 day ago
$231
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Tue, Dec 2 from Islip to Houston, returning Tue, Dec 16, priced at $231 found 1 day ago
Frontier Airlines
Wed, Nov 5 - Thu, Nov 13
ISP
Islip
IAH
Houston
$236 Roundtrip, found 7 hours ago
$236
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Wed, Nov 5 from Islip to Houston, returning Thu, Nov 13, priced at $236 found 7 hours ago
JetBlue Airways
Thu, Mar 26 - Sun, Mar 29
ISP
Islip
IAH
Houston
$690 Roundtrip, found 16 hours ago
$690
Roundtrip
found 16 hours ago
Select JetBlue Airways flight, departing Thu, Mar 26 from Islip to Houston, returning Sun, Mar 29, priced at $690 found 16 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 $248
IAH
George Bush Intercontinental
Cheapest
Average driving time to city center24 min
Flights from $248

Frequently asked questions

How much does a flight from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH) cost?
Secure a cheap one-way flight from $91 or cheap return flight from $170 from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH)?
The cheapest month to fly from ISP to IAH is October, when there's less demand. Off-peak months are generally when you'll find cheap fares for travel between these airports.
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 MacArthur Airport (ISP) to George Bush Intercontinental Airport (IAH)?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll fly you from ISP to IAH. Then, sort your results by "Price (lowest to highest)" to score 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.

Travel information

Origin airport
MacArthur
Destination airport
George Bush Intercontinental
Airlines serving
Frontier Airlines, JetBlue Airways
Roundtrip price
$170
Distance
1452 mi

Book with confidence

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 October. 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 $91 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.

 

Islip to Houston Flights

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*Available to One Key members.