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Islip

$145+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
MHT — ISP
Aug 7 — Aug 141
Thu 8/7
Thu 8/14
1 adult, Economy
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Cheap 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 August 2, 2025.

Round-trip from

$248
(Southwest)

One-way from

$145
(Southwest)

Popular in

June

Cheapest in

October

Average price

$136
From New Hampshire to Islip Long Island
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One-way flight from New Hampshire to Islip Long Island
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Highest demand for flights based on searches. 13% potential increase in price ($30 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find 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 August 2, 2025.

This Southwest deal was found by Cheapflights users on 7/31. 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.
Sat 8/305:50 amBOS - ISP
2 stops9h 05mSouthwest
Sat 9/66:05 amISP - BOS
2 stops9h 35mSouthwest
Deal found 7/31$248
This Southwest deal was found by Cheapflights users on 8/1. 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.
Sun 8/316:10 amPWM - ISP
1 stop6h 40mSouthwest
Sun 9/76:00 amISP - PWM
1 stop3h 40mSouthwest
Deal found 8/1$353
This KAYAK deal was found by Cheapflights users on 8/1. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/259:27 amBOS - ISP
Nonstop1h 31mCape Air
Mon 8/252:19 pmISP - BOS
Nonstop1h 27mCape Air
Deal found 8/1$498
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Fri 8/1511:53 amBOS - ISP
Nonstop1h 31mMultiple Airlines
Tue 8/191:55 pmISP - BOS
2 stops19h 44mMultiple Airlines
Deal found 7/31$541
This FlightHub deal was found by Cheapflights users on 8/1. 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.
Fri 9/262:36 pmPWM - ISP
3 stops28h 16mBreeze Airways
Mon 9/297:08 pmISP - PWM
1 stop17h 10mBreeze Airways
Deal found 8/1$595

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 August 2, 2025.
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

Sat 8/30

5:50 am-2:55 pm

2 stops9h 05m

Islip Long Island

Sat 9/6

6:05 am-3:40 pm

2 stops9h 35m

$248

PortlandIslip

PWM - ISP

PWMISP

Portland

Sun 8/31

6:10 am-12:50 pm

1 stop6h 40m

Islip Long Island

Sun 9/7

6:00 am-9:40 am

1 stop3h 40m

$353

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Mon 8/25

9:27 am-10:58 am

Nonstop1h 31m

Islip Long Island

Mon 8/25

2:19 pm-3:46 pm

Nonstop1h 27m

$498

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Fri 8/15

11:53 am-1:24 pm

Nonstop1h 31m

Islip Long Island

Tue 8/19

1:55 pm-9:39 am

2 stops19h 44m

$541

PortlandIslip

PWM - ISP

PWMISP

Portland

Fri 9/26

2:36 pm-6:52 pm

3 stops28h 16m

Islip Long Island

Mon 9/29

7:08 pm-12:18 pm

1 stop17h 10m

$595

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Sat 8/30

5:50 am-2:55 pm

2 stops9h 05m

$145

PortlandIslip

PWM - ISP

PWMISP

Portland

Sat 8/30

8:15 am-2:55 pm

1 stop6h 40m

$154

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Wed 9/10

6:00 am-3:23 pm

1 stop9h 23m

$172

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Tue 8/12

9:27 am-10:58 am

Nonstop1h 31m

$244

BostonIslip

BOS - ISP

BOSISP

Boston Logan Intl

Thu 8/21

10:34 am-6:59 pm

2 stops8h 25m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/31

Showing 1-10 of 11 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, January is the cheapest month in which you can book a flight from New Hampshire to Islip, New York (average of $108). Flying from New Hampshire to Islip, New York in November is currently the most expensive (average of $213). 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 Islip

Get insights into the airlines that provide service to Islip. 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 Islip. Reviews last updated August 2, 2025.
Read reviews from past customers who have flown Southwest, Breeze Airways, and JetBlue from New Hampshire to Islip. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Breeze Airways
8.0
Very good
191 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
JetBlue
7.3
Good
2,915 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Overall

8.0

Crew

8.6

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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.

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

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $145. However, be on the lookout for offers from JetBlue and Cape Air, as they are both options that can get you from New Hampshire to Islip, New York for a low price.

  • 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, January is the cheapest month in which you can book a flight from New Hampshire to Islip, New York (average of $108). Flying from New Hampshire to Islip, New York in November is currently the most expensive (average of $213). 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
Southampton

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Alternative routes for New Hampshire to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from New Hampshire to Islip

Discover the top airline that operate flights from New Hampshire to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$254Average$466FlexibilityNo cancel feeOn-time63%

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