$269 Cheap Flights from Newburgh (SWF) to Portsmouth (PSM)

View $269 flight on Tue, Sep 2, 2025Opens in a new window

Popular airlines from Stewart Intl. Airport (SWF) to Portsmouth, NH (PSM-Portsmouth Intl.)

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Cheap Flights from Newburgh to Portsmouth (SWF-PSM)

Prices were available within the past 7 days and start at $269 for one-way flights and $528 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Breeze Airways
Fri, Sep 12 - Wed, Oct 1
SWF
Newburgh
PSM
Portsmouth
$528 Roundtrip, just found
$528
Roundtrip
just found
Select Breeze Airways flight, departing Fri, Sep 12 from Newburgh to Portsmouth, returning Wed, Oct 1, priced at $528 just found
Breeze Airways
Fri, Sep 12 - Wed, Oct 1
SWF
Newburgh
PSM
Portsmouth
$537 Roundtrip, found 1 day ago
$537
Roundtrip
found 1 day ago
Select Breeze Airways flight, departing Fri, Sep 12 from Newburgh to Portsmouth, returning Wed, Oct 1, priced at $537 found 1 day ago
Breeze Airways
Fri, Oct 31 - Wed, Nov 5
SWF
Newburgh
PSM
Portsmouth
$565 Roundtrip, found 2 days ago
$565
Roundtrip
found 2 days ago
Select Breeze Airways flight, departing Fri, Oct 31 from Newburgh to Portsmouth, returning Wed, Nov 5, priced at $565 found 2 days ago
Breeze Airways
Fri, Oct 24 - Wed, Nov 5
SWF
Newburgh
PSM
Portsmouth
$602 Roundtrip, found 2 days ago
$602
Roundtrip
found 2 days ago
Select Breeze Airways flight, departing Fri, Oct 24 from Newburgh to Portsmouth, returning Wed, Nov 5, priced at $602 found 2 days ago
Flights from Newburgh (SWF) to Portsmouth (PSM)
Origin airport
Stewart Intl.
Destination airport
Portsmouth Intl.
Roundtrip price
$527
Distance
199 mi

Newburgh to Portsmouth Flights

The cheapest times to fly from Newburgh to Portsmouth

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Newburgh to Portsmouth are during the month of September. You can find some of the cheapest flights from Newburgh to Portsmouth with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Newburgh to Portsmouth

Sunday is one of the best days to book for cheap flights from Newburgh to Portsmouth: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Newburgh to Portsmouth

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Newburgh to Portsmouth in 2025. You can also book with separate airlines for your outbound and return journeys, from $269 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Newburgh to Portsmouth flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Newburgh to Portsmouth airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Stewart Intl. Airport (SWF) to Portsmouth Intl. Airport (PSM) cost?
Discover the latest flight deals from SWF to PSM by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SWF to PSM?
The cheapest flights from SWF to PSM are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SWF to PSM?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SWF to PSM. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Stewart Intl. Airport (SWF) to Portsmouth Intl. Airport (PSM)?
Nonstop flights from Stewart Intl. Airport (SWF) to Portsmouth Intl. Airport (PSM) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SWF to PSM?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Stewart Intl. Airport (SWF) to Portsmouth Intl. Airport (PSM)?
To avoid possible delays on the Stewart Intl. Airport (SWF) to Portsmouth Intl. Airport (PSM) route, travel before 3 PM. Later flights have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Stewart Intl. Airport (SWF) to Portsmouth Intl. Airport (PSM) last-minute?
Last-minute bookings from SWF to PSM are usually more expensive. To secure the best prices, start looking for flights ahead of time. That said, if you can play around with your travel dates, you may score a cheap ticket right before you leave.
Is it cheaper to book a SWF to PSM flight and hotel package?
Compared with arranging hotels and flights separately, booking a SWF to PSM flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place will take the hassle out of planning your trip. Simply secure your flights and choose from our extensive range of stays, then tailor your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Stewart Intl. Airport (SWF) to Portsmouth Intl. Airport (PSM)?
If you booked your SWF to PSM flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

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*Available to One Key members.