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 PDX to PSM?

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

Most accurate provider : When it comes to deals on Portland-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 Portland-Portsmouth, New Hampshire flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Portsmouth, New Hampshire flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Portland-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 Portland-Portsmouth, New Hampshire flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

How can I find direct flights from Portland to Portsmouth?

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

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

Yes. Cheapflights offers flight deals from Portland 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.

$369+ Cheap Flights from Portland to Portsmouth, NH

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Cheap flight deals from Portland to Portsmouth

One-way

One-way flights from Portland to Portsmouth
Search for one-way flight options from Portland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated September 29, 2026.

Thu 10/2912:02 pm -

3 stops50h 53m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$369

Tue 10/2712:02 pm -

2 stops51h 05m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$378

Thu 10/1512:11 pm -

3 stops50h 44m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$441

Fri 10/3012:31 pm -

3 stops51h 36m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$450

Thu 10/811:49 am -

3 stops51h 06m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$462

Mon 10/512:38 pm -

3 stops45h 25m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/26

$613

Fri 10/162:30 pm -

3 stops23h 39m

Wed 12/3112:00 am -

Nonstop0h 00m

Deal found 9/27

$633

Find flight deals from Portland to Portsmouth

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	December
Cheapest in	January
Average price	$424

Provider with most accurate pricing for Portland-Portsmouth Pease Intl flight deals.

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Provider most trusted by Cheapflights users for Portland-Portsmouth Pease Intl flights.

Search Deals

Highest demand for flights based on searches. 7% potential increase in price ($32 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandPortsmouth

PDX Portland - PSM Portsmouth Pease Intl

PDXPSM

Portland

Tue 10/27

12:02 pm-6:07 pm

2 stops51h 05m

Portsmouth Pease Intl

Wed 12/31

12:00 am-9:00 pm

Nonstop0h 00m

$378

PortlandPortsmouth

PDX Portland - PSM Portsmouth Pease Intl

PDXPSM

Portland

Thu 10/15

12:11 pm-5:55 pm

3 stops50h 44m

Portsmouth Pease Intl

Wed 12/31

12:00 am-9:00 pm

Nonstop0h 00m

$441

PortlandPortsmouth

PDX Portland - PSM Portsmouth Pease Intl

PDXPSM

Portland

Fri 10/30

12:31 pm-7:07 pm

3 stops51h 36m

Portsmouth Pease Intl

Wed 12/31

12:00 am-9:00 pm

Nonstop0h 00m

$450

PortlandPortsmouth

PDX Portland - PSM Portsmouth Pease Intl

PDXPSM

Portland

Thu 10/8

11:49 am-5:55 pm

3 stops51h 06m

Portsmouth Pease Intl

Wed 12/31

12:00 am-9:00 pm

Nonstop0h 00m

$462

Quickest round-trip

PortlandPortsmouth

PDX Portland - PSM Portsmouth Pease Intl

PDXPSM

Portland

Fri 10/16

2:30 pm-5:09 pm

3 stops23h 39m

Portsmouth Pease Intl

Wed 12/31

12:00 am-9:00 pm

Nonstop0h 00m

$633

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/26

Sorted by cheapest first

Most accurate provider: When it comes to deals on Portland-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 Portland-Portsmouth, New Hampshire flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Portsmouth, New Hampshire flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Portland-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 Portland-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 Portland to Portsmouth

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

PDX-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

Can I find deals for flights from Portland to Portsmouth that include hotel bookings?
Yes. In addition to deals on Portland to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Portsmouth?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Portsmouth.
Can I find deals for business class flights from Portland to Portsmouth?
Yes. Cheapflights offers flight deals from Portland 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.

Browse thousands of different options on Cheapflights for your next trip

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$369+ Cheap flights from Portland to Portsmouth, NH (PDX - 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 10/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland 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 Portland to Portsmouth

One-way flights from Portland to PortsmouthSearch for one-way flight options from Portland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated September 29, 2026.

Search for one-way flight options from Portland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated September 29, 2026.

Find flight deals from Portland 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 Portland to Portsmouth that are best for you.

Best time to book a flight from Portland to Portsmouth

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

Related info for your journey

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

How can I find direct flights from Portland to Portsmouth?

Can I find deals for business class flights from Portland 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 Portland 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 Portland to Portsmouth by cabin class

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

Portland and Portsmouth flights

Browse other Portland and Portsmouth flight options. Last updated on September 29, 2026.

Other flights from Portland

Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on September 29, 2026.

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One-way flights from Portland to Portsmouth
Search for one-way flight options from Portland to Portsmouth. Find affordable one-way fares based on user searches. Data last updated September 29, 2026.