Cheap flights from Portsmouth to Washington, D.C. Reagan-National Airport from £662
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Portsmouth to Reagan-National
Keep the following information in mind while searching for Portsmouth to Reagan-National flight deals. Data was last updated 17 October 2025.
Find flight deals from Portsmouth to Reagan-National
Cheapest flights from Portsmouth to Reagan-NationalExplore the most affordable flight options available from Portsmouth to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.
Explore the most affordable flight options available from Portsmouth to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Portsmouth to Washington, D.C. Reagan-National Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SouthamptonWashington, D.C.
SOU - DCA
SOUDCA
Southampton Eastleigh
Wed 1/4
09:20-19:20
2 stops15h 00m
Washington, D.C. Reagan-National
Sun 5/4
07:00-08:50
2 stops20h 50m
SouthamptonWashington, D.C.
SOU - DCA
SOUDCA
Southampton Eastleigh
Sun 30/11
09:30-08:55
3 stops28h 25m
Washington, D.C. Reagan-National
Sun 7/12
16:10-19:40
3 stops22h 30m
SouthamptonWashington, D.C.
SOU - DCA
SOUDCA
Southampton Eastleigh
Sun 30/11
09:30-22:56
2 stops18h 26m
Washington, D.C. Reagan-National
Sun 7/12
12:37-08:10
2 stops14h 33m
SouthamptonWashington, D.C.
SOU - DCA
SOUDCA
Southampton Eastleigh
Sun 30/11
16:05-18:56
2 stops55h 51m
Best time to book a flight from Portsmouth to Reagan-National
Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Portsmouth with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Portsmouth to Washington, D.C. Reagan-National Airport
What is the cheapest month to book a flight from Portsmouth to Washington, D.C. Reagan-National Airport?
Currently, January is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. Reagan-National Airport (average of £346). Flying from Portsmouth to Washington, D.C. Reagan-National Airport in July is currently the most expensive (average of £509). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from P0R to DCA?
Find hourly flight availability from Portsmouth to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 October 2025.
One of the essential ways to save on airfare from Portsmouth to Washington, D.C. Reagan-National Airport is to remain as flexible as possible. Flights that are at midday tend to be the most expensive. A flight in the evening could potentially save you up to 28% on airfare.
Related info for your journey
Find useful and relevant information for your journey from Portsmouth to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Washington, D.C. Reagan-National Airport?
Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locationsBrowse thousands of different options on Cheapflights for your next trip
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Alternative routes for Portsmouth to Reagan-National
See prices for flight routes from nearby airports that may be better suited for you.
Top 8 airlines flying from Portsmouth to Reagan-National
Discover the top 8 airlines that operate flights from Portsmouth to Reagan-National. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 October 2025.
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How does Cheapflights help users find flights from Portsmouth to Reagan-National?
When you search for this flight from Portsmouth to Reagan-National, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Reagan-National?
Cheapflights helps you find that perfect flight to Reagan-National from Portsmouth by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Portsmouth to Reagan-National with no change fees?
Yes, we can. To see specific flights from Portsmouth to Reagan-National with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Portsmouth to Reagan-National become cheaper?
Yes, Cheapflights offers price alerts on Portsmouth to Reagan-National flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.