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Cheap flights from Islip, New York to New Hampshire from $85

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to New Hampshire departing on 3/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Islip, New York to New Hampshire

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
4:07 pm - 10:21 am
ISP
-
BOS
18h 14m
1 stop
Multiple Airlines Logo
7:00 am - 9:13 am
BOS
-
ISP
26h 13m
1 stop
$226Multiple Airlines
Mon, May 4 - Thu, May 7
Multiple Airlines Logo
4:07 pm - 10:21 am
ISP
-
BOS
18h 14m
1 stop
Multiple Airlines Logo
6:29 pm - 9:13 am
BOS
-
ISP
14h 44m
2 stops
$256Multiple Airlines
Mon, May 4 - Thu, May 7
Multiple Airlines Logo
3:34 pm - 11:48 am
ISP
-
BOS
20h 14m
1 stop
Multiple Airlines Logo
4:22 pm - 11:10 am
BOS
-
ISP
42h 48m
2 stops
$258Multiple Airlines
Mon, Mar 2 - Mon, Mar 9
Multiple Airlines Logo
2:31 pm - 1:13 am
ISP
-
BOS
10h 42m
2 stops
Multiple Airlines Logo
4:22 pm - 7:38 am
BOS
-
ISP
15h 16m
1 stop
$264Multiple Airlines
Fri, Feb 27 - Sun, Mar 1
Multiple Airlines Logo
3:34 pm - 11:48 am
ISP
-
BOS
20h 14m
1 stop
Multiple Airlines Logo
6:00 am - 11:14 am
BOS
-
ISP
29h 14m
1 stop
$276Multiple Airlines
Mon, Mar 2 - Mon, Mar 9
Southwest Logo
4:30 pm - 11:25 pm
ISP
-
PWM
6h 55m
1 stop
Southwest Logo
5:40 am - 11:35 am
PWM
-
ISP
5h 55m
1 stop
$337Southwest
Thu, May 28 - Sat, May 30
Southwest Logo
4:30 pm - 11:25 pm
ISP
-
PWM
6h 55m
1 stop
Southwest Logo
5:40 am - 3:45 pm
PWM
-
ISP
10h 05m
2 stops
$342Southwest
Thu, May 28 - Sat, May 30
Southwest Logo
5:55 pm - 12:05 am
ISP
-
PWM
6h 10m
1 stop
Southwest Logo
4:30 pm - 10:50 pm
PWM
-
ISP
6h 20m
1 stop
$357Southwest
Mon, Mar 16 - Wed, Mar 18
Breeze Airways Logo
7:26 pm - 9:19 am
ISP
-
MHT
13h 53m
2 stops
Breeze Airways Logo
9:59 am - 8:05 pm
MHT
-
ISP
10h 06m
1 stop
$421Breeze Airways
Thu, Feb 19 - Mon, Feb 23
Breeze Airways Logo
7:20 pm - 9:15 am
ISP
-
MHT
13h 55m
1 stop
Breeze Airways Logo
11:23 am - 1:31 pm
MHT
-
ISP
26h 08m
1 stop
$639Breeze Airways
Fri, Feb 20 - Sun, Feb 22

Cape Air flights from Islip, New York to New Hampshire

Our best Cape Air deals on Islip, New York to New Hampshire flight tickets
Cape Air
Feb 12
ISP9:59 amIslip Long Island
1h 25m
BOS11:24 amBoston Logan Intl
Feb 13
BOS5:18 pmBoston Logan Intl
1h 26m
ISP6:44 pmIslip Long Island
$507
Cape Air
Feb 20
ISP9:59 amIslip Long Island
1h 25m
BOS11:24 amBoston Logan Intl
Feb 23
BOS5:18 pmBoston Logan Intl
1h 26m
ISP6:44 pmIslip Long Island
$565
Cape Air
Feb 12
ISP9:59 amIslip Long Island
1h 25m
BOS11:24 amBoston Logan Intl
Feb 16
BOS5:18 pmBoston Logan Intl
1h 26m
ISP6:44 pmIslip Long Island
$567

Southwest flights from Islip, New York to New Hampshire

Our best Southwest deals on Islip, New York to New Hampshire flight tickets
Southwest
May 17
ISP6:05 amIslip Long Island
3h 50m
1 stop
BOS9:55 amBoston Logan Intl
May 21
BOS8:45 amBoston Logan Intl
7h 45m
1 stop
ISP4:30 pmIslip Long Island
$332
Southwest
Mar 18
ISP4:40 pmIslip Long Island
6h 45m
1 stop
BOS11:25 pmBoston Logan Intl
Mar 19
BOS5:25 pmBoston Logan Intl
6h 30m
1 stop
ISP11:55 pmIslip Long Island
$337
Southwest
May 28
ISP4:30 pmIslip Long Island
6h 55m
1 stop
PWM11:25 pmPortland
May 30
PWM5:40 amPortland
10h 05m
2 stops
ISP3:45 pmIslip Long Island
$342

momondo Fare Finder

 
Customize your flight search to find flights from Islip, New York 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, momondo users made 832,500 searches. Data last updated February 6, 2026.
Use the filters below to find and compare flights from Islip, New York to New Hampshire that are best for you.

Fly from

Fly to

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

Mon 5/4

4:07 pm-10:21 am

1 stop18h 14m

Boston Logan Intl

Thu 5/7

6:29 pm-9:13 am

2 stops14h 44m

$256

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 3/2

3:34 pm-11:48 am

1 stop20h 14m

Boston Logan Intl

Mon 3/9

4:22 pm-11:10 am

2 stops42h 48m

$258

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Fri 2/27

2:31 pm-1:13 am

2 stops10h 42m

Boston Logan Intl

Sun 3/1

4:22 pm-7:38 am

1 stop15h 16m

$264

IslipBoston

ISP - BOS

ISPBOS

Islip Long Island

Mon 3/2

3:34 pm-11:48 am

1 stop20h 14m

Boston Logan Intl

Mon 3/9

6:00 am-11:14 am

1 stop29h 14m

$276

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Thu 5/28

4:30 pm-11:25 pm

1 stop6h 55m

Portland

Sat 5/30

5:40 am-11:35 am

1 stop5h 55m

$337

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Thu 5/28

4:30 pm-11:25 pm

1 stop6h 55m

Portland

Sat 5/30

5:40 am-3:45 pm

2 stops10h 05m

$342

IslipPortland

ISP - PWM

ISPPWM

Islip Long Island

Mon 3/16

5:55 pm-12:05 am

1 stop6h 10m

Portland

Wed 3/18

4:30 pm-10:50 pm

1 stop6h 20m

$357

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Thu 2/19

7:26 pm-9:19 am

2 stops13h 53m

Manchester

Mon 2/23

9:59 am-8:05 pm

1 stop10h 06m

$421

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Fri 2/20

7:20 pm-9:15 am

1 stop13h 55m

Manchester

Sun 2/22

11:23 am-1:31 pm

1 stop26h 08m

$639

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to New Hampshire from

How to get the cheapest flight ticket from Islip, New York to New Hampshire

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to New Hampshire?

The month of June is another great option to travel to New Hampshire, with average flight prices from Islip, New York averaging around $238.

What is the cheapest day to depart on your flight to New Hampshire?

The cheapest day to depart on your flight to New Hampshire is on a Friday when prices can be found for as low as $187. This is often the case because there is less demand to fly during this day of the week. The most expensive day to fly to New Hampshire is Sunday, with ticket prices averaging around $580.

What is the cheapest time of day to depart on your flight to New Hampshire?

According to our data, the cheapest time of day to fly to New Hampshire is in the morning. momondo users have found flights departing from Islip, New York to New Hampshire in the morning for as low as $436. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Try not to purchase tickets at noon because they tend to be around $520. Of course, these prices can vary depending on the time of year and what airport you fly to.

Cheap Islip, New York to New Hampshire flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to New Hampshire

Fastest flight time

1h 25m

Direct flights

Mon, Thu, Fri, Sat and Sun

Airports in New Hampshire

52 airports
The fastest flight from Islip, New York to New Hampshire takes 1h 25m
Direct flights go from Islip, New York to New Hampshire on Monday, Thursday, Friday, Saturday and Sunday. There are no airlines offering direct flights.
There are 52 airports in New Hampshire. From Islip, New York there are direct flights to Boston Logan Intl (BOS).
Search flight deals

  • When did momondo last update prices for flights from Islip Long Island Airport to New Hampshire?

    Prices for flights from Islip Long Island Airport to New Hampshire were last updated today.

  • How many operators does momondo search for flights from Islip Long Island Airport to New Hampshire?

  • How old do you have to be to fly from Islip Long Island Airport to New Hampshire?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to New Hampshire.

  • What documentation or ID do you need to fly to New Hampshire?

    The travel and health documents required for your trip to New Hampshire can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at New Hampshire. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Why use momondo?

Why should I use momondo to find a flight deal from Islip to New Hampshire?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Islip to New Hampshire for you.

Can I find flights from Islip to New Hampshire with flexible booking policies on momondo?

Flights from Islip to New Hampshire with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Islip to New Hampshire?

Once all potential Islip to New Hampshire flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Islip to New Hampshire right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Islip to New Hampshire now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to New Hampshire and let you know when they change.

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