Cheap Flights from Portsmouth (PSM) to Baltimore (BWI)

Popular airlines from Portsmouth, NH (PSM-Portsmouth Intl.) to Baltimore Washington Intl. Airport (BWI)

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Flights from Portsmouth (PSM) to Baltimore (BWI)
Origin airport
Portsmouth Intl.
Destination airport
Baltimore Washington Intl. Thurgood Marshall
Distance
406 mi

Portsmouth to Baltimore Flights

The cheapest times to fly from Portsmouth to Baltimore

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

The best time to book a flight from Portsmouth to Baltimore

Sunday is one of the best days to book for cheap flights from Portsmouth to Baltimore: 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 Portsmouth to Baltimore

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 Portsmouth to Baltimore 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 Portsmouth to Baltimore 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 Portsmouth to Baltimore 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

Is it cheaper to buy a plane ticket from Portsmouth Intl. Airport (PSM) to BWI last minute?
Being the spontaneous type is a fantastic way to travel around, but it’s not necessarily the smartest method to get your hands on a bargain flight. Think about booking your PSM to BWI Marshall journey well ahead of time rather than leaving it to the last minute. Based on flight pricing and demand studies in 2022, we have found that the best time to book domestic flights is between 28 – 35 days ahead of the departure date, and international flights three to four months in advance. We recommend saving that spontaneity for when you reach BWI Marshall!
What airports do you fly into for Baltimore from Portsmouth?
Baltimore Washington Intl. Thurgood Marshall Airport (BWI), Ronald Reagan Washington National Airport (DCA) and Washington Dulles Intl. Airport (IAD) are your choices when flying from Portsmouth to Baltimore. Around 8 mi southwest of the heart of Baltimore, Baltimore Washington Intl. Thurgood Marshall Airport (BWI) is the city’s main hub. Think about things such as flight arrival and departure times and the distance to your hotel before settling on an airport. Oriole Park at Camden Yards and M&T Bank Stadium are two top attractions to visit when you arrive.
Can I change the date of my flight from Portsmouth Intl. Airport at Pease to BWI Marshall?
It’s a cinch to make amendments to your Portsmouth Intl. Airport at Pease to BWI Marshall trip yourself. Just go to the Expedia Trips portal and click on “change flight.” Look for new flights and choose the one that better fits your plans. You’ll see an estimate of applicable flight change fees. You can also visit our Customer Service portal to chat to our Virtual Agent and quickly get answers to all your questions.

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