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Cheap flights from Islip to Boston from $254

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 to Boston departing on 8/27. 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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0 bags

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Find the cheapest flights from Islip to Boston (ISP-MHT)

Cheap round-trip flights

Southwest Logo
12:15 pm - 10:25 pmISP-MHT
10h 10m1 stop
Southwest Logo
5:20 am - 12:05 pmMHT-ISP
6h 45m1 stop
$281Southwest
Find Deal
Sat, Sep 20 - Sat, Sep 27
Southwest Logo
12:15 pm - 10:25 pmISP-MHT
10h 10m1 stop
Southwest Logo
6:00 am - 2:55 pmMHT-ISP
8h 55m2 stops
$287Southwest
Find Deal
Sat, Sep 20 - Sat, Sep 27
Southwest Logo
12:15 pm - 8:50 pmISP-MHT
8h 35m2 stops
Southwest Logo
6:00 am - 2:55 pmMHT-ISP
8h 55m2 stops
$296Southwest
Find Deal
Sat, Sep 20 - Sat, Sep 27
JetBlue Logo
3:39 pm - 1:05 pmISP-MHT
21h 26m1 stop
JetBlue Logo
2:00 pm - 2:44 pmMHT-ISP
24h 44m1 stop
$306JetBlue
Find Deal
Tue, Oct 7 - Tue, Oct 21
Breeze Airways Logo
7:36 pm - 9:19 amISP-MHT
13h 43m2 stops
Breeze Airways Logo
9:59 am - 8:07 pmMHT-ISP
10h 08m1 stop
$524Breeze Airways
Find Deal
Thu, Sep 4 - Mon, Sep 8
Logo
9:37 pm - 3:02 pmISP-MHT
17h 25m2 stops
Logo
9:40 am - 10:57 amMHT-ISP
25h 17m2 stops
$709
Find Deal
Tue, Oct 7 - Tue, Oct 21

Southwest flights from Islip to Manchester, New Hampshire

Our best Southwest deals on Islip to Manchester, New Hampshire flight tickets
Southwest
Sep 20
ISP12:15 pmIslip Long Island
10h 10m
1 stop
MHT10:25 pmManchester
Sep 27
MHT5:20 amManchester
6h 45m
1 stop
ISP12:05 pmIslip Long Island
$281
Find similar
Southwest
Sep 20
ISP12:15 pmIslip Long Island
10h 10m
1 stop
MHT10:25 pmManchester
Sep 27
MHT6:00 amManchester
8h 55m
2 stops
ISP2:55 pmIslip Long Island
$287
Find similar
Southwest
Sep 20
ISP12:15 pmIslip Long Island
8h 35m
2 stops
MHT8:50 pmManchester
Sep 27
MHT6:00 amManchester
8h 55m
2 stops
ISP2:55 pmIslip Long Island
$296
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Islip to Manchester, 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 August 21, 2025.
Use the filters below to find and compare flights from Islip to Manchester, New Hampshire that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Sat 9/20

12:15 pm-10:25 pm

1 stop10h 10m

Manchester

Sat 9/27

5:20 am-12:05 pm

1 stop6h 45m

$281

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Sat 9/20

12:15 pm-10:25 pm

1 stop10h 10m

Manchester

Sat 9/27

6:00 am-2:55 pm

2 stops8h 55m

$287

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Sat 9/20

12:15 pm-8:50 pm

2 stops8h 35m

Manchester

Sat 9/27

6:00 am-2:55 pm

2 stops8h 55m

$296

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Tue 10/7

3:39 pm-1:05 pm

1 stop21h 26m

Manchester

Tue 10/21

2:00 pm-2:44 pm

1 stop24h 44m

$306

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Thu 9/4

7:36 pm-9:19 am

2 stops13h 43m

Manchester

Mon 9/8

9:59 am-8:07 pm

1 stop10h 08m

$524

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Tue 10/7

9:37 pm-3:02 pm

2 stops17h 25m

Manchester

Tue 10/21

9:40 am-10:57 am

2 stops25h 17m

$709

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Wed 8/27

6:05 am-12:35 pm

1 stop6h 30m

$254

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Wed 8/27

12:30 pm-9:30 pm

2 stops9h 00m

$259

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Tue 8/26

5:30 am-1:35 pm

1 stop8h 05m

$334

IslipManchester

ISP - MHT

ISPMHT

Islip Long Island

Tue 8/26

12:30 pm-9:30 pm

2 stops9h 00m

$339

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Boston from

How to get the cheapest flight ticket from Islip to Manchester, 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 day to depart on your flight to Manchester, New Hampshire?

Our data shows that Sunday is the least expensive day to fly to Manchester, New Hampshire. Tickets to fly out on this day can be as low as $239. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to Manchester, New Hampshire on Monday is $407.

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

Our most recent data shows that the best time of day to fly to Manchester, New Hampshire is in the evening. Flights from Islip to Manchester, New Hampshire during this time can be as low as $164. Flights in the afternoon are often more expensive with an average ticket price of $309.

When to book flights from Islip to Manchester, New Hampshire

Are you open to changing your travel dates? Check out the ideal times to fly from Islip to Manchester, New Hampshire according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Islip to Manchester, New Hampshire (ISP to MHT) flight deals and tips

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

Direct flights

None
There are no direct flights from Islip to Manchester, New Hampshire. There are no popular flight routes from Islip to Manchester, New Hampshire.
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  • How far is Islip Long Island to Manchester by plane?

    The distance between Islip Long Island and Manchester is about 180.6 mi. 8h 35m is a normal flight duration for this route.

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

    Prices for flights from Islip Long Island Airport to Manchester Airport are refreshed on a daily basis.

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

    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 Manchester Airport.

  • What documentation or ID do you need to fly to Manchester Airport?

    The travel and health documents you'll need for your trip to Manchester Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Manchester Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Keene

Why use momondo?

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

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 Manchester for you.

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

Flights from Islip to Manchester 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 Manchester?

Once you have performed a search for Islip to Manchester flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Manchester from Islip. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Manchester, New Hampshire trip

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