$152 Cheap Flights from Houston (IAH) to Islip (ISP)

View $152 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 $152 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 16 - Sun, Oct 19
IAH
Houston
ISP
Islip
$170 Roundtrip, found 2 days ago
$170
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Oct 16 from Houston to Islip, returning Sun, Oct 19, priced at $170 found 2 days ago
Frontier Airlines
Thu, Sep 18 - Sun, Sep 21
IAH
Houston
ISP
Islip
$172 Roundtrip, found 4 hours ago
$172
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Houston to Islip, returning Sun, Sep 21, priced at $172 found 4 hours ago
Frontier Airlines
Thu, Oct 16 - Sun, Oct 19
IAH
Houston
ISP
Islip
$196 Roundtrip, found 2 days ago
$196
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Oct 16 from Houston to Islip, returning Sun, Oct 19, priced at $196 found 2 days ago
Frontier Airlines
Fri, Oct 24 - Mon, Oct 27
IAH
Houston
ISP
Islip
$198 Roundtrip, found 7 hours ago
$198
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Fri, Oct 24 from Houston to Islip, returning Mon, Oct 27, priced at $198 found 7 hours ago
Frontier Airlines
Fri, Oct 24 - Sun, Oct 26
IAH
Houston
ISP
Islip
$201 Roundtrip, found 1 day ago
$201
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 24 from Houston to Islip, returning Sun, Oct 26, priced at $201 found 1 day ago
Frontier Airlines
Fri, Oct 17 - Mon, Oct 20
IAH
Houston
ISP
Islip
$203 Roundtrip, found 2 days ago
$203
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Oct 17 from Houston to Islip, returning Mon, Oct 20, priced at $203 found 2 days ago
Frontier Airlines
Thu, Oct 23 - Sun, Oct 26
IAH
Houston
ISP
Islip
$206 Roundtrip, found 4 days ago
$206
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Oct 23 from Houston to Islip, returning Sun, Oct 26, priced at $206 found 4 days ago
Frontier Airlines
Fri, Oct 17 - Sun, Oct 19
IAH
Houston
ISP
Islip
$208 Roundtrip, found 3 days ago
$208
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Fri, Oct 17 from Houston to Islip, returning Sun, Oct 19, priced at $208 found 3 days ago
Frontier Airlines
Fri, Oct 10 - Sun, Oct 12
IAH
Houston
ISP
Islip
$233 Roundtrip, found 1 day ago
$233
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 10 from Houston to Islip, returning Sun, Oct 12, priced at $233 found 1 day ago
Frontier Airlines
Fri, Oct 24 - Sun, Oct 26
IAH
Houston
ISP
Islip
$242 Roundtrip, found 1 day ago
$242
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Oct 24 from Houston to Islip, returning Sun, Oct 26, priced at $242 found 1 day 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 $304
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $304
Flights from Houston (IAH) to Islip (ISP)
Origin airport
George Bush Intercontinental
Destination airport
MacArthur
Airlines serving
Frontier Airlines
Roundtrip price
$169
Distance
1452 mi

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 October. 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 $152 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.

 

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 $152 or cheap return flight from $170 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 October 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.

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*Available to One Key members.