Cheap Flights from Washington D.C. (WASA) to Portsmouth (PSM)

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      Travellers and cabin class, 1 Adult, Economy

      Compare Washington D.C. to Portsmouth flight deals

      Find the cheapest month or even day of the year to fly to Portsmouth

      Book the best Portsmouth fare with no extra fees

      Flight deals from Washington D.C. to Portsmouth

      Looking for a cheap last-minute deal or the best return flight from Washington D.C. to Portsmouth Airport? If you want to travel next month, return fares start from £293. Find the lowest prices on one-way and return tickets right here.

      Find the cheapest month to fly from Washington D.C. to Portsmouth

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington D.C. to Portsmouth flights are currently cheapest in September.

      Washington D.C. to Boston: Flight information

      The things to know before you go.
      Cheapest flight found£117
      Cheapest month to flySeptember

      Finding cheap flights from Washington D.C. to Portsmouth: Frequently asked questions

      The best price we found for a return flight from Washington D.C. to Portsmouth is £230. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      Currently, there are no airlines that fly direct from Washington D.C. to Portsmouth. But we found flights with one stop from £230.
      As of August 2026, there are no flights flying from Washington D.C. to Portsmouth.
      The cheapest month to fly from Washington D.C. to Portsmouth is usually November.
      After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to Portsmouth Airport on Wednesday, 4 November 2026.
      No airlines currently offer direct flights between Washington D.C. and Portsmouth Airport. Most routes have one or more stops.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Portsmouth but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Boston is around 40 days in advance, so don’t leave your flight to the last minute.

      The cheapest airline that flies to Portsmouth is Frontier Airlines .

      Travelling from Washington DC to Pease Air Force Base Airport (PSM): What you need to know

      • Your trip gets off the ground at one of Washington DC's main airports, Ronald Reagan National Airport (DCA) or Washington Dulles International Airport (IAD). Check out your options for booking a flight from Washington DC to Pease Air Force Base Airport (PSM) departing from either of these bases.

      • Portsmouth's timezone is UTC-4, which is the same as Washington DC. Pease Air Force Base Airport is located in Portsmouth.

      • To ensure you get on your flight from Washington DC to PSM, leave enough time for things like baggage drop and finding your gate. Turning up two hours before international departures and one hour before domestic flights is the general rule.

      • Heading away during a peak time like school or public holidays? Expect longer queues at security and check-in. To give yourself peace of mind, arrive up to four hours before international flights and two hours before domestic departures.

      Airports in Washington DC

      Ronald Reagan National Airport (DCA)

      • DCA is about 8 kms (5 miles) from central Washington DC. If you're ride-sharing, driving or catching a cab from the centre, it'll take 15 minutes or so to get there, depending on traffic conditions. If you're using public transport, expect the journey time to be around 45 minutes.

      • Want a stress-free start to your holiday? Stay near Ronald Reagan National Airport. Whether you're boarding an early flight from Washington DC to Pease Air Force Base Airport or just don't want to be rushed, these hotels are just what you're after:

      • When it comes to Ronald Reagan National Airport's on-time performance, 76.44% of flights complete their journey on time.

      • You'll find DCA at 1 Aviation Circle.

      Washington Dulles International Airport (IAD)

      Baltimore/Wash International Thurgood Marshall Airport (BWI)

      • BWI is roughly 48 kms (30 miles) from central Washington DC. Driving from the city centre to the terminal takes about 50 minutes. If you're thinking about taking public transport, you can expect a journey of around 1 hour 30 minutes.

      • Stay in bed a little longer and still make your Washington DC to Pease Air Force Base Airport flight with plenty of time to spare. These hotels near Baltimore/Wash International Thurgood Marshall Airport make departure day effortless if you're jetting off early:

      • The on-time performance rate of BWI is 77.13%. In other words, that's how often flights departing this airport arrive at their final stop as planned.

      About Pease Air Force Base Airport (PSM)

      Getting from Pease Air Force Base Airport (PSM) to central Portsmouth

      • Pease Air Force Base Airport is around 3 miles from central Portsmouth. How long it'll take to get to the centre in a car hire or cab will depend on the time of day. Do a little research beforehand.

      • If you're taking public transport, expect a journey time of roughly 25 minutes.

      How to find the cheapest flights from Washington DC to Pease Air Force Base Airport (PSM)

      • £117 is the best price for a one-way ticket from Washington DC to Pease Air Force Base Airport. A return flight starts from £230. These prices may change based on availability and demand.

      • Booking early is often the key to scoring a cheap flight from Washington DC to PSM. Fares tend to rise as seats fill up, so the closer your departure date, the more you'll likely spend.

      • The 'Whole month' search tool will show you the cheapest Washington DC to Pease Air Force Base Airport tickets throughout the month. It's a good way to find a bargain if your dates are flexible.

      • Locking in a cheap plane ticket from Washington DC to PSM is easy with Price Alerts. All you need to do is set up one of these automatic alerts and we'll let you know as soon as the price has dropped.

      • Tailor your trip using filters. Pick your arrival and departure times, total journey duration and airlines. You can also sort your results by 'Cheapest,' 'Fastest' or 'Best' flights from Washington DC to Pease Air Force Base Airport.

      The best time to fly from Washington DC to Pease Air Force Base Airport (PSM)

      • December is the busiest month for flights from Washington DC to Pease Air Force Base Airport (PSM). Visit Portsmouth in February for a more low-key escape.

      • Book a Washington DC to PSM plane ticket departing in July if you're eager to visit the city during its warmest month. Expect temperatures in Portsmouth to range from 15ºC (59ºF) to 28ºC (82ºF).

      • January has temperatures of between -10ºC (14ºF) and 4ºC (39ºF). Look for cheap tickets from Washington DC to Pease Air Force Base Airport around that time if you want to travel when it's cooler.

      More about Portsmouth

      Explore more of the United States

      • Worcester is just one of the many cities in the United States waiting to be discovered once you've seen the sights of Portsmouth. Around 121 kms (75 miles) away to the south-west, check out popular attractions including Worcester Art Museum, Redemption Rock Brewing and Union Station.

      • Around 145 kms (90 miles) south of Portsmouth, Providence is another favourite stop in the United States. No visit is complete without checking out WaterFire Providence, Museum of Natural History and Planetarium and WaterFire.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.