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$115+ 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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MHT
May 4 — May 111
Sun 5/4
Sun 5/11
1 adult, Economy
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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 April 29, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$208
(Trip.com)

One-way from

$115
(Southwest)

Popular in

April

Cheapest in

August

Average price

$279
Provider with most accurate pricing for New York (NYC)-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Boston Logan Intl flights.
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From Islip Long Island to New Hampshire
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One-way flight from Islip Long Island to New Hampshire
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Highest demand for flights based on searches. 17% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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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 April 29, 2025.

This Trip.com deal was found by Cheapflights users on 4/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/147:15 pmISP - PWM
1 stop25h 14mFrontier
Sat 5/177:30 pmPWM - ISP
1 stop14h 42mFrontier
Deal found 4/27$208
This Southwest deal was found by Cheapflights users on 4/28. 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 5/286:10 amISP - BOS
1 stop4h 10mSouthwest
Wed 5/283:00 pmBOS - ISP
1 stop5h 20mSouthwest
Deal found 4/28$229
This Southwest deal was found by Cheapflights users on 4/28. 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 5/288:20 amISP - PWM
1 stop5h 05mSouthwest
Wed 6/44:05 pmPWM - ISP
1 stop6h 45mSouthwest
Deal found 4/28$229
This Southwest deal was found by Cheapflights users on 4/29. 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 5/274:00 pmISP - MHT
1 stop6h 40mSouthwest
Tue 6/34:50 pmMHT - ISP
1 stop6h 00mSouthwest
Deal found 4/29$242
This JetBlue deal was found by Cheapflights users on 4/28. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/41:41 pmISP - BOS
1 stop10h 12mJetBlue
Sat 6/76:30 amBOS - ISP
1 stop10h 20mJetBlue
Deal found 4/28$353
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1210:44 amISP - BOS
2 stops28h 00mMultiple Airlines
Fri 5/166:10 amBOS - ISP
2 stops31h 35mMultiple Airlines
Deal found 4/29$473
This Mytrip deal was found by Cheapflights users on 4/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/282:55 pmISP - PWM
2 stops22h 53mMultiple Airlines
Wed 6/48:20 pmPWM - ISP
2 stops22h 39mMultiple Airlines
Deal found 4/28$504
This Booking.com deal was found by Cheapflights users on 4/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2811:38 amISP - PWM
2 stops23h 03mBreeze Airways
Sat 11/811:21 amPWM - ISP
2 stops8h 44mBreeze Airways
Deal found 4/28$557
This Mytrip deal was found by Cheapflights users on 4/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/131:55 pmISP - MHT
3 stops28h 11mMultiple Airlines
Sat 5/1712:25 pmMHT - ISP
2 stops30h 34mMultiple Airlines
Deal found 4/28$814

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 April 29, 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

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Wed 5/14

7:15 pm-8:29 pm

1 stop25h 14m

Portland

Sat 5/17

7:30 pm-10:12 am

1 stop14h 42m

$208

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Wed 5/28

6:10 am-10:20 am

1 stop4h 10m

Boston Logan Intl

Wed 6/4

7:30 am-12:25 pm

1 stop4h 55m

$229

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Wed 5/28

8:20 am-1:25 pm

1 stop5h 05m

Portland

Wed 6/4

4:05 pm-10:50 pm

1 stop6h 45m

$229

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Tue 5/27

4:00 pm-10:40 pm

1 stop6h 40m

Manchester

Tue 6/3

4:50 pm-10:50 pm

1 stop6h 00m

$242

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Wed 6/4

1:41 pm-11:53 pm

1 stop10h 12m

Boston Logan Intl

Sat 6/7

6:30 am-4:50 pm

1 stop10h 20m

$353

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 5/12

10:44 am-2:44 pm

2 stops28h 00m

Boston Logan Intl

Fri 5/16

6:10 am-1:45 pm

2 stops31h 35m

$473

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Wed 5/28

2:55 pm-1:48 pm

2 stops22h 53m

Portland

Wed 6/4

8:20 pm-6:59 pm

2 stops22h 39m

$504

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Wed 5/28

7:25 pm-2:32 pm

3 stops19h 07m

Portland

Wed 6/4

8:20 pm-6:59 pm

2 stops22h 39m

$608

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Tue 5/13

1:55 pm-6:06 pm

3 stops28h 11m

Manchester

Sat 5/17

12:25 pm-6:59 pm

2 stops30h 34m

$814

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Wed 5/28

6:10 am-10:20 am

1 stop4h 10m

$115

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

Showing 1-10 of 15 results
1
2

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, January is the cheapest month in which you can book a flight from Islip, New York to New Hampshire (average of $334). Flying from Islip, New York to New Hampshire in June is currently the most expensive (average of $421). 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.

Reviews of airlines servicing New Hampshire

Get insights into the airlines that provide service to New Hampshire. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to New Hampshire. Reviews last updated April 29, 2025.
Read reviews from past customers who have flown Breeze Airways, Southwest and JetBlue from Islip to New Hampshire. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Breeze Airways
8.1
Very good
160 reviews

Crew

8.8

Boarding

8.3

Comfort

8.2

Entertainment

6.6

Food

6.7

Overall

8.1

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Breeze Airways
8.1
Very good
160 reviews
Breeze Airways
8.1
Very good
160 reviews

Crew

8.8

Boarding

8.3

Comfort

8.2

Entertainment

6.6

Food

6.7

Overall

8.1

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Southwest
8.0
Very good
4,295 reviews
Breeze Airways
8.1
Very good
160 reviews

Crew

8.8

Boarding

8.3

Comfort

8.2

Entertainment

6.6

Food

6.7

Overall

8.1

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
JetBlue
7.3
Good
2,922 reviews
Breeze Airways
8.1
Very good
160 reviews

Crew

8.8

Boarding

8.3

Comfort

8.2

Entertainment

6.6

Food

6.7

Overall

8.1

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!
Frontier
6.0
Okay
3,284 reviews
Breeze Airways
8.1
Very good
160 reviews

Crew

8.8

Boarding

8.3

Comfort

8.2

Entertainment

6.6

Food

6.7

Overall

8.1

Reviews

1 / 11
10.0
Excellent

Dena,Dec 2024

LAS - BDL

It was comfortable and the crew was great! A few free snacks offered would be nice!

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.

  • What are the cheapest airlines to fly from Islip, New York to New Hampshire one-way?

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $115. However, be on the lookout for offers from JetBlue and Breeze Airways, as they are both options that can get you from Islip, New York to New Hampshire for a low price.

  • 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, January is the cheapest month in which you can book a flight from Islip, New York to New Hampshire (average of $334). Flying from Islip, New York to New Hampshire in June is currently the most expensive (average of $421). 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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