HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$556+ Cheap flights from Boise to Islip, NY (BOI - ISP)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ISP
feb. 20 — feb. 271
vie. 2/20
vie. 2/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boise to Islip with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Boise to Islip

Cheapest flights from Boise to Islip
Explore the most affordable flight options available from Boise to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 21, 2026.

This Southwest deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 2/206:30 am
BOI
-
ISP
2 stops15h 00m
Southwest
jue. 2/265:35 am
ISP
-
BOI
2 stops13h 10m
Southwest
Deal found 1/20$556
This Southwest deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 1/2711:20 am
BOI
-
ISP
2 stops8h 35m
Southwest
sáb. 1/3112:15 pm
ISP
-
BOI
2 stops11h 00m
Southwest
Deal found 1/21$998

Find flight deals from Boise to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Boise (BOI) to Islip (ISP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated enero 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$556
(Southwest)

Popular in

December

Cheapest in

October

Average price

$526
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Islip Long Island flights.
Search Deals
From Boise Air Term. Gowen Fld to Islip Long Island
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($123 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boise to Islip that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated enero 21, 2026.
Use the filters below to find and compare flights from Boise to Islip that are best for you.

Fly from

Boise

Fly to

Islip

Route

Depart

Return

Price

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

vie. 2/20

6:30 am-11:30 pm

2 stops15h 00m

Islip Long Island

jue. 2/26

5:35 am-4:45 pm

2 stops13h 10m

$556

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

  • Most accurate provider: When it comes to deals on Boise-Islip, New York flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boise-Islip, New York flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boise-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boise-Islip, New York flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Boise-Islip, New York flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Boise to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Boise with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boise to Islip

What is the cheapest month to book a flight from Boise to Islip, New York?

Currently, September is the cheapest month in which you can book a flight from Boise to Islip, New York (average of $115). Flying from Boise to Islip, New York in January is currently the most expensive (average of $292). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Boise to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boise to Islip, New York?

    Southwest can get you from Boise to Islip, New York in just under 15h. Your travel time can differ by up to . The distance from Boise to Islip, New York is about 2190 mi.

  • Can I find deals for flights from Boise to Islip that include hotel bookings?

    Yes. In addition to deals on Boise to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Boise to Islip?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Islip.

  • Can I find deals for business class flights from Boise to Islip?

    Yes. Cheapflights offers flight deals from Boise to Islip by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boise to Islip, New York?

    Currently, September is the cheapest month in which you can book a flight from Boise to Islip, New York (average of $115). Flying from Boise to Islip, New York in January is currently the most expensive (average of $292). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boise to Islip

See prices for flight routes from nearby airports that may be better suited for you.
Boise to John F Kennedy Intl flights
Spokane to John F Kennedy Intl flights
Boise to Newark flights
Boise to LaGuardia flights
Spokane to LaGuardia flights
Spokane to Newark flights
Jackson to Newark flights
Idaho Falls to John F Kennedy Intl flights
Idaho Falls to LaGuardia flights
Idaho Falls to Newark flights
Jackson to John F Kennedy Intl flights
Jackson to LaGuardia flights
Boise to Buffalo flights
Spokane to White Plains flights
Boise to Albany flights
Boise to Syracuse flights
Boise to Rochester flights
Hailey to John F Kennedy Intl flights
Spokane to Rochester flights
Spokane to Syracuse flights
Spokane to Buffalo flights
Idaho Falls to Rochester flights
Idaho Falls to Albany flights
Spokane to Albany flights
Hailey to Rochester flights
Lewiston to Newark flights
Jackson to Rochester flights
Hailey to Albany flights
Pocatello to Rochester flights
Jackson to Buffalo flights
Idaho Falls to Buffalo flights
Twin Falls to Albany flights
Idaho Falls to Binghamton flights
Jackson to White Plains flights
Pocatello to Buffalo flights
Pocatello to John F Kennedy Intl flights
Idaho Falls to White Plains flights
Jackson to Albany flights
Boise to Stewart flights
Boise to Elmira flights
Boise to Binghamton flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.