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Cheap flights from Portsmouth to Washington, D.C. Reagan-National Airport from £478

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 23/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DCA
4 Sep — 11 Sep1
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 5 August 2026.

Thu 17/909:05 -
2 stops17h 58m
Thu 24/906:00 -
2 stops21h 35m
Deal found 3/8£661
Tue 1/909:05 -
2 stops17h 40m
Mon 7/911:50 -
2 stops15h 45m
Deal found 4/8£669
Wed 19/809:15 -
2 stops17h 50m
Wed 30/906:00 -
2 stops21h 35m
Deal found 1/8£735
Wed 19/809:20 -
3 stops31h 40m
Wed 30/911:00 -
3 stops24h 50m
Deal found 1/8£748
Thu 17/917:20 -
3 stops33h 10m
Thu 24/914:54 -
2 stops23h 36m
Deal found 3/8£763
Tue 1/919:30 -
3 stops29h 27m
Mon 7/906:00 -
3 stops29h 50m
Deal found 4/8£928
Mon 3/809:15 -
2 stops16h 18m
Mon 21/919:40 -
2 stops16h 10m
Deal found 31/7£1,179

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 5 August 2026.

Round-trip from

£661

One-way from

£478

Popular in

June

Cheapest in

February

Average price

£554
Delta
  • Delta
  • 17/9-24/9
  • 4 total stops
  • 39h 33m total
  • Portsmouth to Washington, D.C.
Search Deals
23/11
  • 23/11
  • 2 total stops
  • 18h 51m total
  • Portsmouth to Washington, D.C.
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£38 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 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 5 August 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 17/9

09:05-22:03

2 stops17h 58m

Washington, D.C. Reagan-National

Thu 24/9

06:00-08:35

2 stops21h 35m

£661
Fastest return journey

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Tue 1/9

09:05-21:45

2 stops17h 40m

Washington, D.C. Reagan-National

Mon 7/9

11:50-08:35

2 stops15h 45m

£669

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 19/8

09:15-22:05

2 stops17h 50m

Washington, D.C. Reagan-National

Wed 30/9

06:00-08:35

2 stops21h 35m

£735

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 19/8

09:20-12:00

3 stops31h 40m

Washington, D.C. Reagan-National

Wed 30/9

11:00-16:50

2 stops24h 50m

£748

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Thu 17/9

17:20-21:30

3 stops33h 10m

Washington, D.C. Reagan-National

Thu 24/9

14:54-19:30

2 stops23h 36m

£763

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Tue 1/9

19:30-19:57

3 stops29h 27m

Washington, D.C. Reagan-National

Mon 7/9

06:00-16:50

3 stops29h 50m

£928
Cheapest one-way

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Mon 23/11

09:20-23:11

2 stops18h 51m

£478
Fastest single journey

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Wed 19/8

09:20-19:57

2 stops15h 37m

£568

Flights are sorted by cheapest return flights first.

Deals found on 31/7

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

No data available for this route at this time. Please check back soon.

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 17h 58m. 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.

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
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Springfield
Alexandria

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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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East Midlands to Baltimore flights
Doncaster to Dulles Intl flights
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Doncaster to Baltimore flights
Grimsby to Baltimore flights
Grimsby to Reagan-National flights
Grimsby to Dulles Intl flights

Top 5 airlines flying from Portsmouth to Reagan-National

Discover the top 5 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 5 August 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£413Average£544FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
British AirwaysCheapest£415Average£492FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£419Average£538FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£435Average£529FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
American AirlinesCheapest£544Average£582FlexibilityNo 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?

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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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