Due to multiple factors, expect to potentially pay more when booking in December. For low rates, August can be a great choice for travel to Houston. Flights to Houston from Islip, New York in August are about $233 on average during August, but can be found for as low as $37.
Tuesday is generally a great day to depart. Flying on this day could help you save up to 132%.
When flying from Islip, New York to Houston, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 13% versus a flight in the afternoon.
To save on the cost of your flight from Islip, New York to Houston, book at least 30 days before your planned departure. Booking around this time can save you about 39% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $260 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $337.
|Afternoon Noon to 6 PM||100% of ISP to IAH departures|
|Early morning Midnight to 6 AM||0% of ISP to IAH departures|
|Morning 6 AM to noon||0% of ISP to IAH departures|
|Evening 6 PM to midnight||0% of ISP to IAH departures|