HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$229+ Cheap flights from Boise to Islip, NY (BOI - ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/21. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — ISP
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
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 March 11, 2026.

This Southwest deal was found by Cheapflights users on 3/10. 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.
Wed 3/117:40 am
BOI
-
ISP
2 stops13h 10m
Southwest
Wed 3/1812:20 pm
ISP
-
BOI
2 stops13h 30m
Southwest
Deal found 3/10$997

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 March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

December

Cheapest in

October

Average price

$437
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
Highest demand for flights based on searches. 17% potential increase in price ($88 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 11, 2026.
Use the filters below to find and compare flights from Boise to Islip that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way
Quickest one-way

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Sun 6/21

8:20 pm-8:20 am

2 stops10h 00m

$229

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Tue 3/24

7:40 am-10:40 pm

2 stops13h 00m

$289

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Mon 6/22

6:20 am-9:08 am

3 stops48h 48m

$500

BoiseIslip

BOI - ISP

BOIISP

Boise Air Term. Gowen Fld

Tue 3/24

8:28 pm-10:13 am

3 stops59h 45m

$801

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Sorted by cheapest first
  • 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 $113). Flying from Boise to Islip, New York in February is currently the most expensive (average of $331). 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.

  • 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 $113). Flying from Boise to Islip, New York in February is currently the most expensive (average of $331). 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.

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.
Site
©2026 Cheapflights