Cheap Flights from San Diego (SAN) to Portsmouth (PSM)

Popular airlines from San Diego Intl. Airport (SAN) to Portsmouth, NH (PSM-Portsmouth Intl.)

Frequently asked questions

How much does a flight from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM) cost?
Grab a cheap one-way flight or cheap return flight from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM)?
is the cheapest month to fly from SAN to PSM. Planning your trip for the off-season is often the key to scoring lower fares.
What is the cheapest airline that flies from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM)?
Expedia's filter tool lets you easily compare different airlines, flight durations and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest SAN to PSM flight.
How many flights per day from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM)?
Direct flights from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SAN to PSM?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM)?
To arrive at Portsmouth Intl. Airport (PSM) without delays, book a flight that leaves San Diego Intl. Airport (SAN) before 3 PM. The likelihood 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.
What airports do you fly into for Portsmouth from San Diego Intl. Airport (SAN)?
Logan Intl. Airport (BOS) is the only airport in Portsmouth with direct flights from San Diego Intl. Airport (SAN). Check out the options and discover cheap fares on Expedia.
Is it cheaper to buy a plane ticket from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM) last-minute?
Holding off until just before your departure to book your flight from SAN to PSM often results in higher prices. While you might find some last-minute offers, they aren't always guaranteed. Be flexible with your travel plans to boost your chances of landing a bargain.
Is it cheaper to book a SAN to PSM flight and hotel package?
Compared with arranging flights and hotels separately, booking a SAN to PSM flight and hotel package with Expedia could result in significant savings. What's more, managing everything in one place will take the hassle out of planning your trip. Simply pick your flights and choose from our wide range of stays, then personalize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Portsmouth Intl. Airport (PSM)?
Usually, it's possible to cancel or reschedule your SAN to PSM flight. However, if it's been more than 24 hours since booking, 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

Origin airport
San Diego Intl.
Destination airport
Portsmouth Intl.
Distance
2591 mi

Book with confidence

San Diego to Portsmouth Flights

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

 

The best time to book a flight from San Diego to Portsmouth

Sunday is one of the best days to book for cheap flights from San Diego 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 San Diego 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 San Diego 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 San Diego 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 San Diego 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.

 

San Diego to Portsmouth Flights

Explore a world of travel with Expedia

*Available to One Key members.