Cheap Flights from Oslo (OSL) to Portsmouth (PSM)

Popular airlines from Gardermoen Airport (OSL) to Portsmouth, NH (PSM-Portsmouth Intl.)

    notification illustration

    Be in the know

    Get alerts if flight prices drop or rise*
    deals illustration

    Book smarter

    Save up to 30% on select hotels after you book a flight*
    trophy illustration

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Frequently asked questions

How much does a flight from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM) cost?
Grab a cheap one-way flight or cheap return flight from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM)?
The cheapest month to fly from OSL to PSM is , when demand is low. Off-peak months are generally when better flight deals are available between these airports.
What is the cheapest airline that flies from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM)?
To find the cheapest airline flying from OSL to PSM, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM)?
There aren't any daily direct flights from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be soaring above the clouds in no time at all.
What day of the week has the most flights from OSL to PSM?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can change depending on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM)?
To arrive at Portsmouth Intl. Airport (PSM) on schedule, opt for a flight that takes off from Gardermoen Airport (OSL) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM) last-minute?
Last-minute bookings from OSL to PSM are generally more expensive. To lock in the best prices, start looking for flights as early as possible. That being said, if you're flexible with your travel dates, you may land a cheap ticket right before your journey.
Is it cheaper to book an OSL to PSM flight and hotel package?
You'll typically save money by securing an OSL to PSM flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've selected your preferred flights and accommodations, consider adding extras including activities, car rentals and tours.
Can I cancel or change the date of my flight from Gardermoen Airport (OSL) to Portsmouth Intl. Airport (PSM)?
You can usually cancel or reschedule your OSL to PSM flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Travel information

Origin airport
Gardermoen
Destination airport
Portsmouth Intl.
Distance
3449 mi

Book with confidence

Book with confidence

Oslo to Portsmouth Flights

The cheapest times to fly from Oslo 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 Oslo to Portsmouth are during the month of . You can find some of the cheapest flights from Oslo to Portsmouth with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Oslo to Portsmouth

Sunday is one of the best days to book for cheap flights from Oslo 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 Oslo 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 Oslo to Portsmouth in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Oslo 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 Oslo 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.

 

Oslo to Portsmouth Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.