In terms of precipitation, rainfall in Portsmouth, New Hampshire ranges from 2.2 - 5.1 inches per month. November is typically the wettest month, when rainfall can reach 5.1 in. August is typically the driest time to visit Portsmouth, New Hampshire when rainfall is around 2.2 in.

If weather is an important factor for your trip to Portsmouth, New Hampshire, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

What is the cheapest time of day to fly from LGA to PSM?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from New York LaGuardia Airport to Portsmouth, New Hampshire as you normally would.

Most accurate provider : When it comes to deals on New York LaGuardia Airport-Portsmouth, New Hampshire flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on New York LaGuardia Airport-Portsmouth, New Hampshire flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from New York LaGuardia Airport-Portsmouth, New Hampshire flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on New York LaGuardia Airport-Portsmouth, New Hampshire flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New York LaGuardia Airport-Portsmouth, New Hampshire flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly into for flights to Portsmouth from New York LaGuardia?

If you book a flight to Portsmouth from New York LaGuardia, you will be flying to Pease Intl, which is the city’s only airport. Portsmouth Pease Intl (PSM) is located 3.2 mi from the center of Portsmouth. There are 0 flights from New York LaGuardia to Pease Intl per day from 0 different airlines.

Can I find deals for flights from LaGuardia to Portsmouth that include hotel bookings?

Yes. In addition to deals on LaGuardia to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from LaGuardia to Portsmouth?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from LaGuardia to Portsmouth.

Can I find deals for business class flights from LaGuardia to Portsmouth?

Yes. Cheapflights offers flight deals from LaGuardia to Portsmouth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$250+ Cheap Flights from New York LaGuardia Airport, NY to Portsmouth, NH

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Cheap flight deals from LaGuardia to Portsmouth

One-way

One-way flights from LaGuardia to Portsmouth
Search for one-way flight options from LaGuardia to Portsmouth. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.

Wed 11/188:59 pm -

2 stops21h 08m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/19

$250

Thu 11/56:30 am -

2 stops11h 37m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/19

$257

Sat 12/58:55 pm -

2 stops21h 29m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/16

$272

Thu 11/198:10 am -

1 stop9h 57m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/15

$286

Sat 11/218:30 pm -

2 stops22h 09m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/19

$303

Sun 11/17:00 am -

1 stop10h 57m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/15

$304

Sun 11/156:30 am -

2 stops11h 37m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/16

$349

Sun 10/257:00 am -

1 stop10h 57m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 10/18

$498

Find flight deals from LaGuardia to Portsmouth

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	September
Cheapest in	December
Average price	$325

Provider with most accurate pricing for New York LaGuardia-Portsmouth Pease Intl flight deals.

Search Deals

Provider most trusted by Cheapflights users for New York LaGuardia-Portsmouth Pease Intl flights.

Search Deals

Highest demand for flights based on searches. 12% potential increase in price ($38 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from New York LaGuardia Airport to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Wed 11/18

8:59 pm-6:07 pm

2 stops21h 08m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$251

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Thu 11/5

6:30 am-6:07 pm

2 stops11h 37m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$257

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Sat 12/5

8:55 pm-6:24 pm

2 stops21h 29m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$272

Quickest round-trip

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Thu 11/19

8:10 am-6:07 pm

1 stop9h 57m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$286

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Sat 11/21

8:30 pm-6:39 pm

2 stops22h 09m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$303

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Sun 11/1

7:00 am-5:57 pm

1 stop10h 57m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$304

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Sun 11/15

6:30 am-6:07 pm

2 stops11h 37m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$349

New YorkPortsmouth

LGA New York LaGuardia - PSM Portsmouth Pease Intl

LGAPSM

New York LaGuardia

Sun 10/25

7:00 am-5:57 pm

1 stop10h 57m

Portsmouth Pease Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$498

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/19

Sorted by cheapest first

Compare providers for flights from LaGuardia to Portsmouth

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from LaGuardia to Portsmouth in October.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on New York LaGuardia Airport-Portsmouth, New Hampshire flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on New York LaGuardia Airport-Portsmouth, New Hampshire flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from New York LaGuardia Airport-Portsmouth, New Hampshire flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on New York LaGuardia Airport-Portsmouth, New Hampshire flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for New York LaGuardia Airport-Portsmouth, New Hampshire flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from LaGuardia to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from LaGuardia with our price prediction graph.

LGA-PSM

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.

Related info for your journey

What airport do you fly into for flights to Portsmouth from New York LaGuardia?
If you book a flight to Portsmouth from New York LaGuardia, you will be flying to Pease Intl, which is the city’s only airport. Portsmouth Pease Intl (PSM) is located 3.2 mi from the center of Portsmouth. There are 0 flights from New York LaGuardia to Pease Intl per day from 0 different airlines.
Can I find deals for flights from LaGuardia to Portsmouth that include hotel bookings?
Yes. In addition to deals on LaGuardia to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from LaGuardia to Portsmouth?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from LaGuardia to Portsmouth.
Can I find deals for business class flights from LaGuardia to Portsmouth?
Yes. Cheapflights offers flight deals from LaGuardia to Portsmouth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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$250+ Cheap flights from LaGuardia, NY (LGA) to Portsmouth, NH (PSM)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from LaGuardia to Portsmouth with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from LaGuardia to Portsmouth

One-way flights from LaGuardia to PortsmouthSearch for one-way flight options from LaGuardia to Portsmouth. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.

Search for one-way flight options from LaGuardia to Portsmouth. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.

Find flight deals from LaGuardia to Portsmouth

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from New York LaGuardia Airport to Portsmouth that are best for you.

Compare providers for flights from LaGuardia to Portsmouth

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from LaGuardia to Portsmouth in October.

Best time to book a flight from LaGuardia to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from LaGuardia with our price prediction graph.

Related info for your journey

What airport do you fly into for flights to Portsmouth from New York LaGuardia?

Can I find deals for flights from LaGuardia to Portsmouth that include hotel bookings?

How can I find direct flights from LaGuardia to Portsmouth?

Can I find deals for business class flights from LaGuardia to Portsmouth?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for LaGuardia to Portsmouth

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Complete your trip

Complete your trip to Portsmouth by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from LaGuardia to Portsmouth by cabin class

Find flights from LaGuardia to Portsmouth, based on your preferred cabin class, be it economy, premium economy, business, or first class.

LaGuardia and Portsmouth flights

Browse other LaGuardia and Portsmouth flight options. Last updated on October 19, 2026.

Other flights from LaGuardia

Browse through other flights departing from LaGuardia. Flights are based on user searches made on Cheapflights and were last updated on October 19, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Other flights to Portsmouth

Explore flights to Portsmouth departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 19, 2026.

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One-way flights from LaGuardia to Portsmouth
Search for one-way flight options from LaGuardia to Portsmouth. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.