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Cheap flights from Portsmouth to Washington, D.C.

LHR — WAS
30 Oct — 6 Nov1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Portsmouth to Washington, D.C.

Popular in

June

Cheapest in

February

Average price

£504
Highest demand for flights based on searches. 8% potential increase in price (£38 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£5 potential savings vs. average return price).
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Average for round-trip flights in September 2026
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Cheapflights Insights

Everything you need to know about your flight from Portsmouth to Washington, D.C.

What is the cheapest time of day to fly from P0R to WAS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Washington, D.C. as you normally would.

Related info for your journey

  • What are the most popular routes from Portsmouth to Washington, D.C.?

    The most popular route from Portsmouth to Washington, D.C. is Southampton Eastleigh - Washington, D.C. Dulles Intl. You may also consider Southampton Eastleigh - Baltimore/Washington or Southampton Eastleigh - Washington, D.C. Reagan-National.

  • What are the most reliable airlines from Portsmouth to Washington, D.C.?

    Consider Air Canada (78%), Austrian Airlines (78%) or Copa Airlines (78%) when booking your flight. These represent the most reliable airlines when flying from Portsmouth to Washington, D.C..

  • What are the cheapest flights from Portsmouth to Washington, D.C.?

    On average you can expect to pay £1,426 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £349 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £513.

  • Can I find deals for flights from Portsmouth to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Portsmouth to Washington, D.C. flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Washington, D.C.?

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

  • Can I find deals for business class flights from Portsmouth to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Portsmouth to Washington, D.C. 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.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Silver Spring
Alexandria
Gaithersburg
Oxon Hill
Hanover
Woodbridge
Glen Burnie
Springfield

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Portsmouth to Washington, D.C.

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£289Average£480FlexibilityNo cancel feeOn-time76%
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Virgin AtlanticCheapest£333Average£531FlexibilityNo cancel feeOn-time72%
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TAP AIR PORTUGALCheapest£346Average£457FlexibilityNo cancel feeOn-timeN/A
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KLMCheapest£386Average£580FlexibilityNo cancel feeOn-time75%
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Aer LingusCheapest£407Average£606FlexibilityNo cancel feeOn-timeN/A
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United AirlinesCheapest£413Average£583FlexibilityNo cancel feeOn-time69%
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Air FranceCheapest£413Average£638FlexibilityNo cancel feeOn-time77%
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British AirwaysCheapest£414Average£568FlexibilityNo cancel feeOn-time70%
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Scandinavian AirlinesCheapest£415Average£489FlexibilityNo cancel feeOn-time77%
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LufthansaCheapest£416Average£549FlexibilityNo cancel feeOn-time76%
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Fly with Cheapflights

How does Cheapflights help users find flights from Portsmouth to Washington, D.C.?

Deals for Portsmouth to Washington, D.C. flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Washington, D.C.?

Cheapflights simply makes it quick and affordable to book flights from Portsmouth to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Portsmouth to Washington, D.C. with no change fees?

Certainly. Search results for flights to Washington, D.C. from Portsmouth shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Portsmouth to Washington, D.C. become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Portsmouth today and book when prices fit your budget.

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