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Islip

$106+ Cheap flights from New Hampshire to Islip, NY (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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — ISP
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
1 adult, Economy
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Cheap flight deals from New Hampshire to Islip

Cheapest flights from New Hampshire to Islip
Explore the most affordable flight options available from New Hampshire to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 5, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/274:22 pm
BOS
-
ISP
1 stop18h 44m
Multiple Airlines
Mon 3/23:34 pm
ISP
-
BOS
1 stop20h 14m
Multiple Airlines
Deal found 2/3$241
This Southwest deal was found by Cheapflights users on 2/3. 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.
Tue 7/148:55 am
BOS
-
ISP
1 stop4h 50m
Southwest
Wed 7/1512:25 pm
ISP
-
BOS
1 stop5h 20m
Southwest
Deal found 2/3$327
This Southwest deal was found by Cheapflights users on 2/3. 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.
Mon 7/135:45 am
BOS
-
ISP
1 stop6h 05m
Southwest
Wed 7/1512:25 pm
ISP
-
BOS
1 stop5h 20m
Southwest
Deal found 2/3$347
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/252:23 pm
BOS
-
ISP
1 stop24h 16m
Multiple Airlines
Sat 2/288:23 pm
ISP
-
BOS
1 stop12h 43m
Multiple Airlines
Deal found 2/3$354
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/107:00 am
BOS
-
ISP
1 stop30h 13m
Multiple Airlines
Tue 2/1711:59 am
ISP
-
BOS
1 stop25h 56m
Multiple Airlines
Deal found 2/3$356
This Southwest deal was found by Cheapflights users on 2/2. 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.
Thu 3/127:00 am
BOS
-
ISP
1 stop4h 40m
Southwest
Sat 3/145:50 pm
ISP
-
BOS
1 stop6h 15m
Southwest
Deal found 2/2$357
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/43:43 pm
BOS
-
ISP
1 stop27h 05m
Multiple Airlines
Wed 2/1111:50 am
ISP
-
BOS
1 stop23h 00m
Multiple Airlines
Deal found 2/3$378
This Southwest deal was found by Cheapflights users on 2/3. 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.
Thu 2/195:35 am
PWM
-
ISP
1 stop6h 20m
Southwest
Sun 2/225:35 pm
ISP
-
PWM
1 stop6h 15m
Southwest
Deal found 2/3$581
This Southwest deal was found by Cheapflights users on 2/3. 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.
Tue 2/35:45 am
PWM
-
ISP
1 stop6h 10m
Southwest
Thu 2/55:55 am
ISP
-
PWM
1 stop6h 30m
Southwest
Deal found 2/3$717

Find flight deals from New Hampshire to Islip

Keep the following information in mind while searching for New Hampshire to Islip flight deals. Data was last updated February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$241
(Kiwi.com)

One-way from

$106
(Kiwi.com)

Popular in

June

Cheapest in

November

Average price

$208
Provider with most accurate pricing for Boston Logan Intl-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-New York (NYC) flights.
Search Deals
From New Hampshire to Islip Long Island
Search Deals
One-way flight from New Hampshire to Islip Long Island
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($14 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from New Hampshire 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 February 5, 2026.
Use the filters below to find and compare flights from New Hampshire to Islip that are best for you.

Fly from

New Hampshire

Fly to

Islip

Route

Depart

Return

Price

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Wed 2/25

2:23 pm-2:39 pm

1 stop24h 16m

Islip Long Island

Sat 2/28

8:23 pm-9:06 am

1 stop12h 43m

$354

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Tue 2/10

7:00 am-1:13 pm

1 stop30h 13m

Islip Long Island

Tue 2/17

11:59 am-1:55 pm

1 stop25h 56m

$356

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Thu 3/12

7:00 am-11:40 am

1 stop4h 40m

Islip Long Island

Sat 3/14

5:50 pm-12:05 am

1 stop6h 15m

$357

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Thu 3/12

12:56 pm-1:31 pm

1 stop24h 35m

Islip Long Island

Sat 3/14

9:59 am-11:24 am

Nonstop1h 25m

$395

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Fri 2/27

5:18 pm-6:44 pm

Nonstop1h 26m

Islip Long Island

Mon 3/2

3:34 pm-11:48 am

1 stop20h 14m

$400

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Fri 3/20

12:45 pm-5:20 pm

1 stop4h 35m

Islip Long Island

Sun 3/22

5:55 pm-12:05 am

1 stop6h 10m

$416

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Mon 2/16

5:18 pm-6:44 pm

Nonstop1h 26m

Islip Long Island

Wed 2/18

11:50 am-10:50 am

1 stop23h 00m

$421

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Fri 2/20

5:35 am-12:15 pm

1 stop6h 40m

Islip Long Island

Mon 2/23

11:50 am-4:05 pm

1 stop4h 15m

$429

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Tue 2/17

12:42 pm-1:13 pm

1 stop24h 31m

Islip Long Island

Sat 2/21

11:50 am-11:35 am

1 stop23h 45m

$435

PortlandIslip

PWM - ISP

PWMISP

Portland

Thu 2/19

5:35 am-11:55 am

1 stop6h 20m

Islip Long Island

Sun 2/22

5:35 pm-11:50 pm

1 stop6h 15m

$581

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 21 results
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Best time to book a flight from New Hampshire to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from New Hampshire 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 New Hampshire to Islip

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

Currently, August is the cheapest month in which you can book a flight from New Hampshire to Islip, New York (average of $57). Flying from New Hampshire to Islip, New York in April is currently the most expensive (average of $268). 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 New Hampshire to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Islip from New Hampshire?

    Islip Long Island (ISP) is the airport you will fly into if you book a flight from New Hampshire to Islip. It is only a 7.2 mi journey from Long Island (ISP) to Islip’s city center.

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

    A quick flight from New Hampshire to Islip, New York can take about 4h 40m. Southwest provides one of the quickest options available for as low as $357. The distance between New Hampshire and Islip, New York is about 153 mi.

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

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

  • How can I find direct flights from New Hampshire to Islip?

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

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

    Yes. Cheapflights offers flight deals from New Hampshire 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 New Hampshire to Islip, New York?

    Currently, August is the cheapest month in which you can book a flight from New Hampshire to Islip, New York (average of $57). Flying from New Hampshire to Islip, New York in April is currently the most expensive (average of $268). 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

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