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$126+ 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 1/20. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MHT
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
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Find 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 November 6, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/6. 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 12/128:29 pmISP - BOS
1 stop13h 32mMultiple Airlines
Mon 12/158:11 pmBOS - ISP
1 stop23h 23mMultiple Airlines
Deal found 11/6$195
This Priceline deal was found by Cheapflights users on 11/6. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1710:45 amISP - BOS
1 stop10h 17mJetBlue
Thu 12/189:55 amBOS - ISP
1 stop8h 50mJetBlue
Deal found 11/6$280
This Southwest deal was found by Cheapflights users on 11/6. 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 12/125:30 pmISP - BOS
1 stop5h 25mSouthwest
Mon 12/155:30 amBOS - ISP
2 stops9h 50mSouthwest
Deal found 11/6$332
This Kiwi.com deal was found by Cheapflights users on 11/6. 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.
Sun 11/169:27 pmISP - BOS
1 stop11h 01mMultiple Airlines
Thu 12/118:11 pmBOS - ISP
2 stops23h 56mMultiple Airlines
Deal found 11/6$337
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 12/176:00 amISP - BOS
1 stop27h 52mMultiple Airlines
Thu 12/182:39 pmBOS - ISP
Nonstop1h 36mMultiple Airlines
Deal found 11/6$356
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 11/174:58 pmISP - BOS
2 stops31h 01mMultiple Airlines
Fri 11/215:45 pmBOS - ISP
1 stop14h 17mMultiple Airlines
Deal found 11/6$385
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 12/19:59 amISP - BOS
Nonstop1h 25mMultiple Airlines
Tue 12/29:54 pmBOS - ISP
2 stops35h 19mMultiple Airlines
Deal found 11/5$401
This Southwest deal was found by Cheapflights users on 11/6. 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 12/175:40 amISP - BOS
1 stop4h 00mSouthwest
Thu 12/181:45 pmBOS - ISP
2 stops10h 05mSouthwest
Deal found 11/6$413
This Southwest deal was found by Cheapflights users on 11/5. 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 12/15:50 pmISP - BOS
1 stop4h 50mSouthwest
Tue 12/212:20 pmBOS - ISP
2 stops9h 20mSouthwest
Deal found 11/5$452
This Kiwi.com deal was found by Cheapflights users on 11/6. 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 11/74:58 pmISP - MHT
1 stop25h 58mMultiple Airlines
Thu 11/1311:17 amMHT - ISP
2 stops23h 20mMultiple Airlines
Deal found 11/6$487
This FlightHub deal was found by Cheapflights users on 11/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/128:45 pmISP - PWM
1 stop20h 15mBreeze Airways
Sat 11/156:18 pmPWM - ISP
2 stops16h 42mBreeze Airways
Deal found 11/5$702
This Southwest deal was found by Cheapflights users on 11/6. 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 11/77:00 amISP - MHT
2 stops9h 45mSouthwest
Thu 11/1312:30 pmMHT - ISP
2 stops10h 05mSouthwest
Deal found 11/6$939

Cheap 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 November 6, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$195
(Kiwi.com)

One-way from

$126
(Priceline)

Popular in

April

Cheapest in

November

Average price

$186
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. 5% potential increase in price ($13 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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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 November 6, 2025.
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

Fri 12/12

8:29 pm-10:01 am

1 stop13h 32m

Boston Logan Intl

Mon 12/15

8:11 pm-7:34 pm

1 stop23h 23m

$195

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Fri 1/30

3:45 pm-10:05 pm

1 stop6h 20m

Boston Logan Intl

Sun 2/1

5:50 am-11:55 am

1 stop6h 05m

$327

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Fri 12/12

5:30 pm-10:55 pm

1 stop5h 25m

Boston Logan Intl

Mon 12/15

5:30 am-3:20 pm

2 stops9h 50m

$332

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Sun 11/16

9:27 pm-8:28 am

1 stop11h 01m

Boston Logan Intl

Thu 12/11

8:11 pm-8:07 pm

2 stops23h 56m

$337

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Thu 3/5

6:00 am-9:50 am

1 stop3h 50m

Boston Logan Intl

Sun 3/8

5:15 am-11:45 am

1 stop6h 30m

$347

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Fri 4/17

8:35 am-2:10 pm

1 stop5h 35m

Portland

Sun 4/19

12:40 pm-4:40 pm

1 stop4h 00m

$377

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 12/1

9:59 am-11:24 am

Nonstop1h 25m

Boston Logan Intl

Tue 12/2

9:54 pm-9:13 am

2 stops35h 19m

$401

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Wed 12/17

5:40 am-9:40 am

1 stop4h 00m

Boston Logan Intl

Thu 12/18

1:45 pm-11:50 pm

2 stops10h 05m

$413

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 12/1

5:50 pm-10:40 pm

1 stop4h 50m

Boston Logan Intl

Tue 12/2

12:20 pm-9:40 pm

2 stops9h 20m

$452

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Thu 3/5

10:31 am-10:10 am

1 stop23h 39m

Boston Logan Intl

Sun 3/8

2:39 pm-4:15 pm

Nonstop1h 36m

$471

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/6

Showing 1-10 of 27 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 April is currently the most expensive (average of $301). 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 6h 20m. Your travel time can differ by up to 14h 56m. 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 April is currently the most expensive (average of $301). 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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