$82 Cheap Flights from Houston (IAH) to Islip (ISP)

View $82 flight on Tue, Nov 18, 2025Opens in a new window

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

Cheap Flights from Houston to Islip (IAH-ISP)

Prices were available within the past 7 days and start at $82 for one-way flights and $164 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 13 - Mon, Nov 17
IAH
Houston
ISP
Islip
$164 Roundtrip, found 1 day ago
$164
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Houston to Islip, returning Mon, Nov 17, priced at $164 found 1 day ago
Frontier Airlines
Tue, Nov 4 - Wed, Nov 19
IAH
Houston
ISP
Islip
$180 Roundtrip, found 3 days ago
$180
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Tue, Nov 4 from Houston to Islip, returning Wed, Nov 19, priced at $180 found 3 days ago
Frontier Airlines
Thu, Nov 13 - Fri, Nov 14
IAH
Houston
ISP
Islip
$184 Roundtrip, found 1 day ago
$184
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Houston to Islip, returning Fri, Nov 14, priced at $184 found 1 day ago
Frontier Airlines
Mon, Oct 27 - Mon, Nov 3
IAH
Houston
ISP
Islip
$192 Roundtrip, found 7 hours ago
$192
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Mon, Oct 27 from Houston to Islip, returning Mon, Nov 3, priced at $192 found 7 hours ago
Frontier Airlines
Mon, Oct 27 - Sun, Nov 2
IAH
Houston
ISP
Islip
$204 Roundtrip, found 7 hours ago
$204
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Mon, Oct 27 from Houston to Islip, returning Sun, Nov 2, priced at $204 found 7 hours ago
Frontier Airlines
Tue, Oct 28 - Tue, Nov 11
IAH
Houston
ISP
Islip
$206 Roundtrip, found 3 days ago
$206
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Tue, Oct 28 from Houston to Islip, returning Tue, Nov 11, priced at $206 found 3 days ago
Frontier Airlines
Thu, Nov 13 - Thu, Nov 20
IAH
Houston
ISP
Islip
$218 Roundtrip, found 1 day ago
$218
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Houston to Islip, returning Thu, Nov 20, priced at $218 found 1 day ago
Frontier Airlines
Thu, Oct 23 - Sun, Oct 26
IAH
Houston
ISP
Islip
$221 Roundtrip, found 1 day ago
$221
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Oct 23 from Houston to Islip, returning Sun, Oct 26, priced at $221 found 1 day ago
Frontier Airlines
Thu, Nov 13 - Mon, Nov 24
IAH
Houston
ISP
Islip
$228 Roundtrip, found 1 day ago
$228
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Houston to Islip, returning Mon, Nov 24, priced at $228 found 1 day ago
JetBlue Airways
Fri, Mar 13 - Sat, Mar 21
IAH
Houston
ISP
Islip
$927 Roundtrip, found 3 days ago
$927
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Fri, Mar 13 from Houston to Islip, returning Sat, Mar 21, priced at $927 found 3 days ago

Alternative airports near Islip

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

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $164
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $164

Frequently asked questions

How much does a flight from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP) cost?
Get a cheap one-way flight from $82 or cheap return flight from $164 from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP)?
Traveling in November is a good way to save, as it's the cheapest month for flights between IAH and ISP. You'll often find the lowest fares during the off-season.
What is the cheapest airline that flies from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest IAH to ISP flight.
How many flights per day from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP)?
You'll have to catch a flight with a layover if you're traveling from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP). Direct flights don't operate daily on this route. However, simply filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from IAH to ISP?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP)?
To avoid potential delays on the George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP) route, travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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.
What airports do you fly into for Islip from George Bush Intercontinental Airport (IAH)?
If you're catching a direct flight from George Bush Intercontinental Airport (IAH) to Islip, you can land at either LaGuardia Airport (LGA) or John F. Kennedy Intl. Airport (JFK).
Is it cheaper to buy a plane ticket from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP) last-minute?
Booking your flight from IAH to ISP right before your trip is usually more expensive. However, if there's some wiggle room with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book an IAH to ISP flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAH to ISP flight and hotel package with Expedia could result in significant savings. What's more, having everything in one convenient place takes the hassle out of travel planning. Just pick your flights and choose from our wide range of hotels, then personalize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from George Bush Intercontinental Airport (IAH) to MacArthur Airport (ISP)?
It's usually possible to reschedule or cancel your IAH to ISP flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
George Bush Intercontinental
Destination airport
MacArthur
Airlines serving
Frontier Airlines
Roundtrip price
$164
Distance
1452 mi

Book with confidence

Houston to Islip Flights

The cheapest times to fly from Houston to Islip

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 Houston to Islip are during the month of November. You can find some of the cheapest flights from Houston to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Houston to Islip

Sunday is one of the best days to book for cheap flights from Houston to Islip: 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 Houston to Islip

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 Houston to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from $82 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 Houston to Islip 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 Houston to Islip 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.

 

Houston to Islip Flights

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*Available to One Key members.