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New Hampshire

$106+ Cheap flights from Islip, NY (ISP) to New Hampshire

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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MHT
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
1 adult, Economy
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Cheap flight deals from Islip to New Hampshire

Cheapest flights from Islip to New Hampshire
Explore the most affordable flight options available from Islip to New Hampshire. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 3, 2026.

This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/44:07 pm
ISP
-
BOS
1 stop18h 14m
Multiple Airlines
Thu 5/77:00 am
BOS
-
ISP
1 stop26h 13m
Multiple Airlines
Deal found 2/2$226
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/61:42 pm
ISP
-
BOS
1 stop8h 19m
Multiple Airlines
Sun 3/812:43 pm
BOS
-
ISP
2 stops24h 48m
Multiple Airlines
Deal found 2/2$279
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.
Tue 3/315:45 am
ISP
-
BOS
1 stop5h 05m
Southwest
Sat 4/44:45 pm
BOS
-
ISP
1 stop6h 50m
Southwest
Deal found 2/2$327
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.
Tue 3/105:45 am
ISP
-
BOS
1 stop5h 05m
Southwest
Tue 3/1012:00 pm
BOS
-
ISP
1 stop4h 05m
Southwest
Deal found 2/2$337
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.
Mon 3/95:55 pm
ISP
-
BOS
1 stop6h 10m
Southwest
Tue 3/107:10 pm
BOS
-
ISP
1 stop3h 40m
Southwest
Deal found 2/2$347
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.
Wed 3/1812:20 pm
ISP
-
BOS
2 stops9h 05m
Southwest
Fri 3/2012:45 pm
BOS
-
ISP
1 stop4h 35m
Southwest
Deal found 2/2$352
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.
Mon 3/211:50 am
ISP
-
BOS
1 stop4h 15m
Southwest
Mon 3/95:25 pm
BOS
-
ISP
1 stop6h 30m
Southwest
Deal found 2/2$357
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 4/308:35 am
ISP
-
BOS
1 stop6h 30m
Southwest
Sun 5/35:30 am
BOS
-
ISP
1 stop6h 20m
Southwest
Deal found 2/2$363
This Southwest deal was found by Cheapflights users on 2/1. 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 2/265:35 pm
ISP
-
BOS
1 stop6h 05m
Southwest
Fri 2/2712:50 pm
BOS
-
ISP
1 stop4h 10m
Southwest
Deal found 2/1$367
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/3111:59 am
ISP
-
BOS
1 stop10h 30m
Multiple Airlines
Sat 4/45:45 am
BOS
-
ISP
2 stops18h 05m
Multiple Airlines
Deal found 2/2$373
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.
Fri 9/1810:20 am
ISP
-
PWM
1 stop4h 40m
Southwest
Sun 9/206:10 am
PWM
-
ISP
1 stop3h 45m
Southwest
Deal found 2/2$387
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/312:45 pm
ISP
-
MHT
1 stop20h 30m
Multiple Airlines
Mon 2/93:13 pm
MHT
-
ISP
2 stops46h 00m
Multiple Airlines
Deal found 2/2$506

Find flight deals from Islip to New Hampshire

Keep the following information in mind while searching for Islip to New Hampshire flight deals. Data was last updated February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$226
(Kiwi.com)

One-way from

$106
(Kiwi.com)

Popular in

January

Cheapest in

November

Average price

$233
Provider with most accurate pricing for New York (NYC)-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-Boston Logan Intl flights.
Search Deals
From Islip Long Island to New Hampshire
Search Deals
One-way flight from Islip Long Island to New Hampshire
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($4 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 Islip to New Hampshire 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 3, 2026.
Use the filters below to find and compare flights from Islip to New Hampshire that are best for you.

Fly from

Islip

Fly to

New Hampshire

Route

Depart

Return

Price

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 5/4

4:07 pm-10:21 am

1 stop18h 14m

Boston Logan Intl

Thu 5/7

7:00 am-9:13 am

1 stop26h 13m

$226

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Fri 3/6

1:42 pm-10:01 pm

1 stop8h 19m

Boston Logan Intl

Sun 3/8

12:43 pm-1:31 pm

2 stops24h 48m

$279

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Tue 3/31

5:45 am-10:50 am

1 stop5h 05m

Boston Logan Intl

Sat 4/4

4:45 pm-11:35 pm

1 stop6h 50m

$327

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Thu 4/16

6:00 am-10:00 am

1 stop4h 00m

Boston Logan Intl

Sat 4/18

7:25 pm-11:20 pm

1 stop3h 55m

$327

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Tue 3/10

5:45 am-10:50 am

1 stop5h 05m

Boston Logan Intl

Tue 3/10

12:00 pm-4:05 pm

1 stop4h 05m

$337

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Wed 3/18

5:45 am-10:50 am

1 stop5h 05m

Boston Logan Intl

Fri 3/20

12:45 pm-5:20 pm

1 stop4h 35m

$347

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 3/9

5:55 pm-12:05 am

1 stop6h 10m

Boston Logan Intl

Tue 3/10

7:10 pm-10:50 pm

1 stop3h 40m

$347

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 3/2

11:50 am-4:05 pm

1 stop4h 15m

Boston Logan Intl

Mon 3/9

5:25 pm-11:55 pm

1 stop6h 30m

$357

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Thu 4/30

8:35 am-3:05 pm

1 stop6h 30m

Boston Logan Intl

Sun 5/3

5:30 am-11:50 am

1 stop6h 20m

$363

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Thu 2/26

5:35 pm-11:40 pm

1 stop6h 05m

Boston Logan Intl

Fri 2/27

12:50 pm-5:00 pm

1 stop4h 10m

$367

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/2

Showing 1-10 of 28 results
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Best time to book a flight from Islip to New Hampshire

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

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

Currently, July is the cheapest month in which you can book a flight from Islip, New York to New Hampshire (average of $77). Flying from Islip, New York to New Hampshire in November is currently the most expensive (average of $672). 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 Islip to New Hampshire. 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 from for flights from Islip to New Hampshire?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to New Hampshire. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

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

    Southwest and Breeze Airways can get you from Islip, New York to New Hampshire in just under 5h 05m. Your travel time can differ by up to 8h 48m. Islip, New York and New Hampshire are separated by a distance of 153 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from Islip, New York to New Hampshire?

    Most travelers choose Islip Long Island - Boston Logan Intl, Islip Long Island - Portland or Islip Long Island - Manchester when deciding on the best route from Islip, New York to New Hampshire.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Islip, New York to New Hampshire (average of $77). Flying from Islip, New York to New Hampshire in November is currently the most expensive (average of $672). 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

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