Cheap Flights from Portsmouth (PSM) to Londonderry (LDY)

Popular airlines from Portsmouth, NH (PSM-Portsmouth Intl.) to Londonderry (LDY-City of Derry)

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Flights from Portsmouth (PSM) to Londonderry (LDY)
Origin airport
Portsmouth Intl.
Destination airport
City of Derry
Distance
2887 mi

Portsmouth to Londonderry Flights

The cheapest times to fly from Portsmouth to Londonderry

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

 

The best time to book a flight from Portsmouth to Londonderry

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

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 Londonderry in 2026. 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 Londonderry 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 Londonderry 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 Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY) cost?
Grab a cheap one-way flight or cheap return flight from Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY) 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 Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY)?
The cheapest month to fly from PSM to LDY is , when demand is low. Off-peak season is often when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest PSM to LDY flight.
How many flights per day from Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY)?
You'll need to book a flight with a layover when traveling from Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover the best option for your trip.
What day of the week has the most flights from PSM to LDY?
Usually you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can vary depending on the airline, season 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 Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY)?
To touch down at City of Derry Airport (LDY) on schedule, book a flight that takes off from Portsmouth Intl. Airport (PSM) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY) last-minute?
Holding off until just before your trip to book your flight from PSM to LDY generally means paying more. Although you may find some last-minute deals, they aren't always guaranteed. Be flexible with your itinerary to boost your chances of getting a bargain.
Is it cheaper to book a PSM to LDY flight and hotel package?
You'll typically save money by booking a PSM to LDY flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. After choosing your ideal accommodations and flights, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Portsmouth Intl. Airport (PSM) to City of Derry Airport (LDY)?
Generally, it's possible to reschedule or cancel your PSM to LDY flight. However, if it's been more than 24 hours since booking, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and whether any costs are involved. You'll also find more information on our Customer Service portal.

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*Available to One Key members.