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New Hampshire

$89+ 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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — MHT
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
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 julio 3, 2025.

Round-trip from

$177
(Southwest)

One-way from

$89
(Southwest)

Popular in

April

Cheapest in

October

Average price

$172
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. 19% potential increase in price ($46 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 3, 2025.

This Southwest deal was found by Cheapflights users on 7/3. 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.
mar. 8/266:05 amISP - BOS
1 stop4h 25mSouthwest
mié. 8/2710:50 amBOS - ISP
1 stop4h 20mSouthwest
Deal found 7/3$177
This Southwest deal was found by Cheapflights users on 7/1. 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.
sáb. 8/233:40 pmISP - PWM
1 stop6h 20mSouthwest
sáb. 8/308:15 amPWM - ISP
1 stop6h 40mSouthwest
Deal found 7/1$219
This Cheapflightsfares deal was found by Cheapflights users on 7/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/304:45 pmISP - BOS
1 stop7h 53mFrontier
mié. 8/68:00 amBOS - ISP
1 stop7h 42mFrontier
Deal found 7/2$243
This Southwest deal was found by Cheapflights users on 7/2. 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.
jue. 7/246:00 amISP - MHT
1 stop4h 45mSouthwest
dom. 7/275:35 amMHT - ISP
1 stop6h 10mSouthwest
Deal found 7/2$347
This Expedia deal was found by Cheapflights users on 7/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 7/162:19 pmISP - BOS
Nonstop1h 27mMultiple Airlines
mié. 8/68:00 amBOS - ISP
1 stop7h 42mMultiple Airlines
Deal found 7/2$400
This JetBlue deal was found by Cheapflights users on 7/1. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/1512:35 pmISP - BOS
1 stop8h 11mJetBlue
sáb. 10/46:00 amBOS - ISP
1 stop8h 44mJetBlue
Deal found 7/1$448
This FlightHub deal was found by Cheapflights users on 7/1. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/237:25 pmISP - PWM
3 stops19h 07mBreeze Airways
sáb. 8/308:07 pmPWM - ISP
2 stops22h 52mBreeze Airways
Deal found 7/1$571
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 7/317:39 pmISP - PWM
2 stops21h 46mMultiple Airlines
jue. 8/73:17 pmPWM - ISP
3 stops18h 47mMultiple Airlines
Deal found 7/1$888

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 julio 3, 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

mar. 8/26

6:05 am-10:30 am

1 stop4h 25m

Boston Logan Intl

mié. 8/27

10:50 am-3:10 pm

1 stop4h 20m

$177

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

sáb. 8/23

3:40 pm-10:00 pm

1 stop6h 20m

Portland

sáb. 8/30

8:15 am-2:55 pm

1 stop6h 40m

$219

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

mié. 7/30

4:45 pm-12:38 am

1 stop7h 53m

Boston Logan Intl

mié. 8/6

8:00 am-3:42 pm

1 stop7h 42m

$243

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

jue. 7/24

6:00 am-10:45 am

1 stop4h 45m

Manchester

dom. 7/27

5:35 am-11:45 am

1 stop6h 10m

$347

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

mié. 7/16

2:19 pm-3:46 pm

Nonstop1h 27m

Boston Logan Intl

mié. 8/6

8:00 am-3:42 pm

1 stop7h 42m

$400

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

mar. 7/15

12:35 pm-8:46 pm

1 stop8h 11m

Boston Logan Intl

sáb. 10/4

6:00 am-2:44 pm

1 stop8h 44m

$448

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

mié. 8/6

7:30 am-8:57 am

Nonstop1h 27m

Boston Logan Intl

mié. 8/6

11:53 am-1:24 pm

Nonstop1h 31m

$500

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

sáb. 8/23

7:25 pm-2:32 pm

3 stops19h 07m

Portland

sáb. 8/30

8:07 pm-6:59 pm

2 stops22h 52m

$571

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

jue. 7/31

7:39 pm-5:25 pm

2 stops21h 46m

Portland

jue. 8/7

3:17 pm-10:04 am

3 stops18h 47m

$888

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

lun. 9/1

6:00 am-10:00 am

1 stop4h 00m

$89

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 16 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 April is currently the most expensive (average of $396). 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 julio 3, 2025.
Get a feel of what it's like to fly with Breeze Airways, Southwest, and JetBlue from Islip to New Hampshire by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Comfort

8.2

Food

6.8

Overall

8.1

Crew

8.8

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
183 reviews
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Comfort

8.2

Food

6.8

Overall

8.1

Crew

8.8

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
4,266 reviews
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Comfort

8.2

Food

6.8

Overall

8.1

Crew

8.8

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
2,916 reviews
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Comfort

8.2

Food

6.8

Overall

8.1

Crew

8.8

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
5.9
Fair
3,286 reviews
Breeze Airways
8.1
Very good
183 reviews

Boarding

8.3

Entertainment

6.6

Comfort

8.2

Food

6.8

Overall

8.1

Crew

8.8

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 $89. However, be on the lookout for offers from Frontier and JetBlue, 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 April is currently the most expensive (average of $396). 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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Alternative routes for Islip to New Hampshire

See prices for flight routes from nearby airports that may be better suited for you.
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