How long is the flight from Portsmouth to Washington, D.C.?

A quick flight from Portsmouth to Washington, D.C. can take about 15h 05m. British Airways provides one of the quickest options available for as low as £513. The distance from Portsmouth to Washington, D.C. is about 3639 mi. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in Washington, D.C. ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C., use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

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 - Baltimore/Washington. You may also consider Southampton Eastleigh - Washington, D.C. Dulles Intl or Southampton Eastleigh - Washington, D.C. Reagan-National.

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

On average you can expect to pay £1,403 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £337 while the most popular route, (Southampton Eastleigh - Baltimore/Washington) is currently priced at £607.

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..

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.

£434+ Cheap Flights from Portsmouth to Washington, D.C.

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

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Portsmouth to Washington, D.C.
Explore the most affordable flight options available from Portsmouth to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Thu 29/1012:25 -

1 stop11h 55m

Thu 5/1117:15 -

1 stop13h 40m

Deal found 18/9£512

Wed 7/1009:20 -

1 stop15h 05m

Wed 14/1017:15 -

1 stop10h 25m

Deal found 18/9£513

Tue 13/1009:15 -

1 stop11h 30m

Tue 20/1021:05 -

1 stop17h 25m

Deal found 15/9£515

Sun 4/1009:20 -

1 stop11h 25m

Sun 11/1017:15 -

1 stop10h 25m

Deal found 15/9£518

Wed 7/1009:20 -

1 stop11h 25m

Tue 13/1017:15 -

1 stop9h 50m

Deal found 14/9£519

Thu 12/1109:20 -

1 stop11h 25m

Sun 15/1117:15 -

1 stop10h 35m

Deal found 17/9£541

Thu 29/1019:40 -

2 stops26h 25m

Thu 5/1118:55 -

2 stops19h 15m

Deal found 17/9£607

Thu 29/1008:40 -

2 stops28h 36m

Thu 5/1112:37 -

2 stops14h 33m

Deal found 18/9£639

Sat 31/1009:25 -

2 stops17h 30m

Sat 7/1112:27 -

2 stops15h 28m

Deal found 16/9£644

Sat 31/1009:25 -

2 stops16h 24m

Sat 7/1112:27 -

2 stops15h 28m

Deal found 16/9£651

Tue 13/1009:05 -

2 stops18h 59m

Tue 20/1012:37 -

2 stops15h 08m

Deal found 15/9£654

Tue 13/1009:05 -

2 stops18h 50m

Tue 20/1014:00 -

2 stops13h 45m

Deal found 15/9£654

Best flights from Portsmouth to Washington, D.C.
Discover carefully curated flight deals from Portsmouth to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Wed 7/1009:20 -

1 stop15h 05m

Wed 14/1017:15 -

1 stop10h 25m

Deal found 18/9£513

Sat 31/1009:25 -

2 stops17h 30m

Sat 7/1112:27 -

2 stops15h 28m

Deal found 16/9£644

Sat 31/1009:25 -

2 stops16h 24m

Sat 7/1112:27 -

2 stops15h 28m

Deal found 16/9£651

Fri 16/1009:20 -

2 stops15h 52m

Fri 23/1013:15 -

2 stops14h 25m

Deal found 18/9£795

Thu 29/1012:25 -

1 stop11h 55m

Thu 5/1117:15 -

1 stop13h 40m

Deal found 17/9£514

Wed 7/1009:20 -

1 stop11h 25m

Tue 13/1017:15 -

1 stop9h 50m

Deal found 17/9£516

Sun 4/1009:20 -

1 stop11h 25m

Sun 11/1017:15 -

1 stop10h 25m

Deal found 15/9£518

Tue 13/1009:05 -

2 stops18h 59m

Tue 20/1012:37 -

2 stops15h 08m

Deal found 15/9£654

Tue 13/1009:05 -

2 stops18h 50m

Tue 20/1014:00 -

2 stops13h 45m

Deal found 15/9£654

Thu 12/1109:20 -

1 stop11h 25m

Sun 15/1117:15 -

1 stop10h 35m

Deal found 17/9£541

Sat 31/1009:25 -

2 stops19h 26m

Sat 7/1118:32 -

2 stops17h 18m

Deal found 16/9£695

Tue 20/1009:15 -

2 stops15h 12m

Sat 24/1014:59 -

2 stops13h 46m

Deal found 17/9£868

Thu 29/1019:40 -

2 stops26h 25m

Thu 5/1118:55 -

2 stops19h 15m

Deal found 17/9£607

Sat 31/1008:20 -

2 stops15h 20m

Sat 7/1109:15 -

3 stops25h 20m

Deal found 16/9£903

Thu 28/119:15 -

2 stops50h 50m

Mon 1/218:55 -

2 stops36h 10m

Deal found 16/9£622

Sat 31/1012:25 -

3 stops34h 53m

Sat 7/1116:00 -

3 stops35h 50m

Deal found 16/9£1,130

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

Round-trip from	£512
One-way from	£434
Popular in	June
Cheapest in	February
Average price	£490

British Airways
29/10-5/11
2 total stops
25h 35m total
Portsmouth to Washington, D.C.

Search Deals

3/10-31/12
3 total stops
40h 35m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£39 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 September 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Washington, D.C. that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Sat 3/10

07:50-19:25

3 stops40h 35m

Baltimore/Washington

Wed 31/12

00:00-06:00

Nonstop0h 00m

£434

Fastest return journey

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Mon 23/11

08:40-15:55

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£444

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Mon 23/11

08:40-23:27

2 stops19h 47m

Baltimore/Washington

Wed 31/12

00:00-06:00

Nonstop0h 00m

£448

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - DCA Washington, D.C. Reagan-National

SOUDCA

Southampton Eastleigh

Mon 23/11

08:40-17:59

2 stops14h 19m

Washington, D.C. Reagan-National

Wed 31/12

00:00-06:00

Nonstop0h 00m

£448

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Sat 3/10

09:20-19:10

1 stop14h 50m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£467

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Sun 29/11

20:00-15:45

1 stop24h 45m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£468

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Wed 7/10

09:20-19:25

1 stop15h 05m

Washington, D.C. Dulles Intl

Wed 14/10

17:15-08:40

1 stop10h 25m

£513

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Thu 29/10

12:25-20:20

1 stop11h 55m

Washington, D.C. Dulles Intl

Thu 5/11

17:15-11:55

1 stop13h 40m

£514

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Wed 7/10

09:20-15:45

1 stop11h 25m

Washington, D.C. Dulles Intl

Tue 13/10

17:15-08:05

1 stop9h 50m

£516

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Sun 4/10

09:20-15:45

1 stop11h 25m

Washington, D.C. Dulles Intl

Sun 11/10

17:15-08:40

1 stop10h 25m

£518

Flights are sorted by cheapest return flights first.

Deals found on 15/9

Showing 1-10 of 29 resultsSorted by cheapest first

Best time to book a flight from Portsmouth to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Portsmouth with our price prediction graph.

SOU-IAD

SOU-DCA

SOU-BWI

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.

P0R-WAS

SOU-IAD

SOU-DCA

SOU-BWI

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.

Weekly flight availability from Portsmouth to Washington, D.C.

The most flights from P0R to WAS are scheduled on a Thursday (29 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (24 on average).

Related info for your journey

How long is the flight from Portsmouth to Washington, D.C.?
A quick flight from Portsmouth to Washington, D.C. can take about 15h 05m. British Airways provides one of the quickest options available for as low as £513. The distance from Portsmouth to Washington, D.C. is about 3639 mi. Both multi-stop and direct flights can be found to your destination and back.
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 - Baltimore/Washington. You may also consider Southampton Eastleigh - Washington, D.C. Dulles Intl 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 £1,403 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £337 while the most popular route, (Southampton Eastleigh - Baltimore/Washington) is currently priced at £607.
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.

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Washington, D.C. flight routes

Alternative routes for Portsmouth to Washington, D.C.

Heathrow to Dulles Intl flights

Gatwick to Dulles Intl flights

Heathrow to Reagan-National flights

Stansted to Dulles Intl flights

London City to Dulles Intl flights

Luton to Dulles Intl flights

Gatwick to Reagan-National flights

Manchester to Dulles Intl flights

Manchester to Reagan-National flights

Edinburgh to Dulles Intl flights

Edinburgh to Reagan-National flights

London City to Reagan-National flights

Birmingham to Dulles Intl flights

Birmingham to Reagan-National flights

Leeds to Dulles Intl flights

Southampton to Dulles Intl flights

Newcastle upon Tyne to Dulles Intl flights

Newcastle upon Tyne to Reagan-National flights

Southend to Dulles Intl flights

Exeter to Dulles Intl flights

Grimsby to Dulles Intl flights

Leeds to Reagan-National flights

Bristol to Reagan-National flights

Norwich to Dulles Intl flights

Norwich to Reagan-National flights

Bristol to Dulles Intl flights

Grimsby to Reagan-National flights

Southampton to Reagan-National flights

Doncaster to Dulles Intl flights

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

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£286	Average£475	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest£334	Average£524	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£382	Average£574	FlexibilityNo cancel fee	On-time75%	Search KLM flights
TAP AIR PORTUGAL	Cheapest£385	Average£449	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Aer Lingus	Cheapest£398	Average£601	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Lufthansa	Cheapest£408	Average£544	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£409	Average£559	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
British Airways	Cheapest£409	Average£558	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Air France	Cheapest£409	Average£632	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Scandinavian Airlines	Cheapest£411	Average£479	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights

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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.?

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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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Cheap flights from Portsmouth to Washington, D.C. from £434

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel.

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

Cheapest flights from Portsmouth to Washington, D.C.Explore the most affordable flight options available from Portsmouth to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Explore the most affordable flight options available from Portsmouth to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Best flights from Portsmouth to Washington, D.C.Discover carefully curated flight deals from Portsmouth to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Discover carefully curated flight deals from Portsmouth to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Last-minute flights from Portsmouth to Washington, D.C.Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 18 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 18 September 2026 and is based on user searches.

One-way flights from Portsmouth to Washington, D.C.Search for one-way flight options from Portsmouth to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 18 September 2026.

Search for one-way flight options from Portsmouth to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 18 September 2026.

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

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One-way from

Popular in

Cheapest in

Average price

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Use the filters below to find and compare flights from Portsmouth to Washington, D.C. that are best for you.

Best time to book a flight from Portsmouth to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Portsmouth with our price prediction graph.

Cheapflights Insights

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

Find hourly flight availability from Portsmouth to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 18 September 2026.

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.

Weekly flight availability from Portsmouth to Washington, D.C.

The most flights from P0R to WAS are scheduled on a Thursday (29 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (24 on average).

Related info for your journey

How long is the flight from Portsmouth to Washington, D.C.?

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

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

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

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

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

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

Travelling to a place near Washington, D.C.?

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Alternative routes for Portsmouth to Washington, D.C.

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Complete your trip

Complete your trip to Washington, D.C. by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

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Search flights from Portsmouth to Washington, D.C. by cabin class

Find flights from Portsmouth to Washington, D.C., based on your preferred cabin class, be it economy, premium economy, business, or first class.

Portsmouth and Washington, D.C. flights

Browse other Portsmouth and Washington, D.C. flight options. Last updated on 18 September 2026.

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Portsmouth to Washington, D.C. flights

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

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Cheapest flights from Portsmouth to Washington, D.C.
Explore the most affordable flight options available from Portsmouth to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2026.

Best flights from Portsmouth to Washington, D.C.
Discover carefully curated flight deals from Portsmouth to Washington, D.C. that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 18 September 2026.

Last-minute flights from Portsmouth to Washington, D.C.
Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 18 September 2026 and is based on user searches.

One-way flights from Portsmouth to Washington, D.C.
Search for one-way flight options from Portsmouth to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 18 September 2026.