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Cheap flights from Portsmouth to Washington, D.C. Reagan-National Airport from £584

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 26/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DCA
16 Apr — 23 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Reagan-National

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Reagan-National
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 March 2026.

Thu 30/420:00
SOU
-
DCA
2 stops52h 03m
Multiple Airlines
Thu 7/506:00
DCA
-
SOU
2 stops32h 30m
Multiple Airlines
Deal found 16/3£761
Wed 29/409:05
SOU
-
DCA
2 stops18h 17m
Delta
Wed 6/511:48
DCA
-
SOU
2 stops15h 47m
Delta
Deal found 15/3£770
Tue 17/312:25
SOU
-
DCA
2 stops23h 36m
Multiple Airlines
Tue 24/306:00
DCA
-
SOU
2 stops29h 35m
Multiple Airlines
Deal found 12/3£798
Fri 1/509:20
SOU
-
DCA
2 stops18h 39m
Multiple Airlines
Fri 8/506:00
DCA
-
SOU
2 stops29h 50m
Multiple Airlines
Deal found 17/3£854
Sun 26/409:15
SOU
-
DCA
2 stops18h 26m
Delta
Sun 3/510:05
DCA
-
SOU
2 stops17h 30m
Delta
Deal found 12/3£1,032
Sat 21/309:25
SOU
-
DCA
2 stops17h 26m
KLM
Sat 28/313:40
DCA
-
SOU
2 stops14h 05m
KLM
Deal found 16/3£1,432
Sat 21/317:30
SOU
-
DCA
2 stops27h 30m
Multiple Airlines
Sat 28/319:00
DCA
-
SOU
2 stops32h 35m
Multiple Airlines
Deal found 16/3£1,728

Find 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 March 2026.

Round-trip from

£761

One-way from

£584

Popular in

July

Cheapest in

February

Average price

£521
30/4-7/5
  • 30/4-7/5
  • 4 total stops
  • 84h 33m total
  • Portsmouth to Washington, D.C.
Search Deals
26/8
  • 26/8
  • 2 total stops
  • 17h 30m total
  • Portsmouth to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£55 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Reagan-National that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 17 March 2026.
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

Cheapest return flight

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Thu 30/4

20:00-19:03

2 stops52h 03m

Washington, D.C. Reagan-National

Thu 7/5

06:00-19:30

2 stops32h 30m

£761
Fastest return journey

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 29/4

09:05-22:22

2 stops18h 17m

Washington, D.C. Reagan-National

Wed 6/5

11:48-08:35

2 stops15h 47m

£770

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Fri 1/5

09:20-21:55

3 stops17h 35m

Washington, D.C. Reagan-National

Fri 8/5

16:20-19:30

2 stops22h 10m

£928

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Sun 26/4

09:15-22:41

2 stops18h 26m

Washington, D.C. Reagan-National

Sun 3/5

10:05-08:35

2 stops17h 30m

£1,032
Cheapest one-way
Fastest single journey

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 26/8

09:20-21:50

2 stops17h 30m

£584

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 20/5

09:20-22:15

2 stops17h 55m

£705

Flights are sorted by cheapest return flights first.

Deals found on 16/3

Sorted by cheapest first

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.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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, February is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. Reagan-National Airport (average of £377). Flying from Portsmouth to Washington, D.C. Reagan-National Airport in April is currently the most expensive (average of £553). 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.

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.

  • How long is the flight from Portsmouth to Washington, D.C. Reagan-National Airport?

    Departing from Portsmouth to Washington, D.C. Reagan-National Airport will take you 18h 17m. The distance between Portsmouth and Washington, D.C. Reagan-National Airport is about 3626 mi.

  • Can I find deals for flights from Portsmouth to Reagan-National that include hotel bookings?

    Yes. In addition to deals on Portsmouth to Reagan-National flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Reagan-National?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Reagan-National.

  • Can I find deals for business class flights from Portsmouth to Reagan-National?

    Yes. Cheapflights offers flight deals from Portsmouth to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portsmouth to Washington, D.C. Reagan-National Airport?

    Currently, February is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. Reagan-National Airport (average of £377). Flying from Portsmouth to Washington, D.C. Reagan-National Airport in April is currently the most expensive (average of £553). 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.

See more FAQs

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 locations
Silver Spring
Hanover
Oxon Hill
Gaithersburg
Woodbridge
Arlington
Alexandria
College Park

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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.
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Grimsby to Baltimore flights
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Norwich to Baltimore flights
Norwich to Dulles Intl flights
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Doncaster to Dulles Intl flights
East Midlands to Baltimore flights
Doncaster to Baltimore flights

Top 6 airlines flying from Portsmouth to Reagan-National

Discover the top 6 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 March 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£333Average£589FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£401Average£619FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
JetBlueCheapest£416Average£621FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
British AirwaysCheapest£432Average£581FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Virgin AtlanticCheapest£439Average£550FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
American AirlinesCheapest£529Average£587FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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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.

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