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

A quick flight from Portsmouth to Washington, D.C. can take about 14h 55m. Aer Lingus provides one of the quickest options available for as low as £621. 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 £1,244 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £408 while the most popular route, (Southampton Eastleigh - Baltimore/Washington) is currently priced at £816.

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

Consider Air Canada (87%), Austrian Airlines (87%) or Copa Airlines (87%) 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.

£336+ 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 April 2026.

Tue 2/609:20

SOU

IAD

1 stop15h 15m

Aer Lingus

Tue 9/621:05

IAD

SOU

1 stop17h 25m

Aer Lingus

Deal found 18/4£596

Tue 2/609:20

SOU

BWI

2 stops15h 05m

Multiple Airlines

Tue 9/620:30

BWI

SOU

2 stops18h 00m

Multiple Airlines

Deal found 18/4£602

Mon 1/609:20

SOU

IAD

1 stop14h 55m

Aer Lingus

Mon 8/621:00

IAD

SOU

1 stop17h 30m

Aer Lingus

Deal found 16/4£621

Thu 29/1009:20

SOU

IAD

1 stop11h 15m

Aer Lingus

Thu 5/1117:05

IAD

SOU

1 stop18h 30m

Aer Lingus

Deal found 15/4£664

Tue 2/609:20

SOU

IAD

1 stop15h 15m

Multiple Airlines

Tue 9/621:05

IAD

SOU

2 stops30h 30m

Multiple Airlines

Deal found 18/4£665

Tue 2/609:20

SOU

DCA

3 stops29h 59m

Multiple Airlines

Tue 9/606:00

DCA

SOU

3 stops32h 30m

Multiple Airlines

Deal found 18/4£689

Fri 29/509:20

SOU

IAD

1 stop14h 55m

Aer Lingus

Fri 5/621:00

IAD

SOU

1 stop17h 30m

Aer Lingus

Deal found 14/4£717

Mon 1/617:20

SOU

DCA

3 stops34h 08m

Multiple Airlines

Mon 8/606:00

DCA

SOU

3 stops32h 30m

Multiple Airlines

Deal found 17/4£735

Thu 29/1009:20

SOU

IAD

1 stop15h 10m

Multiple Airlines

Thu 5/1118:20

IAD

SOU

2 stops17h 15m

Multiple Airlines

Deal found 15/4£739

Fri 29/509:25

SOU

IAD

2 stops14h 35m

Multiple Airlines

Fri 5/611:30

IAD

SOU

3 stops27h 00m

Multiple Airlines

Deal found 14/4£775

Mon 1/619:20

SOU

IAD

2 stops24h 50m

Multiple Airlines

Mon 8/608:18

IAD

SOU

3 stops30h 12m

Multiple Airlines

Deal found 16/4£785

Thu 29/1020:00

SOU

BWI

2 stops27h 45m

Multiple Airlines

Thu 5/1120:35

BWI

SOU

2 stops17h 55m

Multiple Airlines

Deal found 15/4£815

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

Round-trip from	£621
One-way from	£336
Popular in	July
Cheapest in	February
Average price	£522

Aer Lingus
1/6-8/6
2 total stops
32h 25m total
Portsmouth to Washington, D.C.

Search Deals

31/5
3 total stops
48h 16m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£48 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 April 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 - BWI

SOUBWI

Southampton Eastleigh

Tue 2/6

09:20-19:25

2 stops15h 05m

Baltimore/Washington

Tue 9/6

20:30-19:30

2 stops18h 00m

£602

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Tue 2/6

09:20-10:19

3 stops29h 59m

Washington, D.C. Reagan-National

Tue 9/6

06:00-19:30

3 stops32h 30m

£689

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Mon 1/6

17:20-22:28

3 stops34h 08m

Washington, D.C. Reagan-National

Mon 8/6

06:00-19:30

3 stops32h 30m

£735

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 29/5

09:25-19:00

2 stops14h 35m

Washington, D.C. Dulles Intl

Fri 5/6

16:05-19:30

2 stops22h 25m

£831

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 28/6

20:00-15:45

1 stop24h 45m

Washington, D.C. Dulles Intl

Tue 7/7

21:05-16:50

1 stop14h 45m

£837

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Fri 29/5

17:20-22:28

3 stops34h 08m

Washington, D.C. Reagan-National

Fri 5/6

06:59-19:30

3 stops31h 31m

£837

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 2/9

09:20-19:15

1 stop14h 55m

Washington, D.C. Dulles Intl

Sun 6/9

17:15-16:50

1 stop18h 35m

£847

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Fri 26/6

06:50-19:40

2 stops17h 50m

Baltimore/Washington

Tue 7/7

21:30-21:05

2 stops18h 35m

£879

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 7/5

12:35-19:40

2 stops36h 05m

Baltimore/Washington

Mon 11/5

21:30-20:55

2 stops18h 25m

£894

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Fri 29/5

09:05-23:24

2 stops19h 19m

Washington, D.C. Reagan-National

Fri 5/6

11:00-08:45

2 stops16h 45m

£966

Flights are sorted by cheapest return flights first.

Deals found on 13/4

Showing 1-10 of 41 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-BWI

SOU-DCA

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-BWI

SOU-DCA

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 Wednesday (34 on average). You will have fewer flight options on Monday, 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 14h 55m. Aer Lingus provides one of the quickest options available for as low as £621. 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 (87%), Austrian Airlines (87%) or Copa Airlines (87%) 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 £1,244 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £408 while the most popular route, (Southampton Eastleigh - Baltimore/Washington) is currently priced at £816.
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

Silver Spring

Hanover

Oxon Hill

Gaithersburg

Woodbridge

Arlington

Alexandria

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to United States

Flights by cabin class

Other flight options

Popular flights

Top destinations

Washington, D.C. flight routes

Alternative routes for Portsmouth to Washington, D.C.

Heathrow to Dulles Intl flights

Heathrow to Reagan-National flights

Gatwick to Dulles Intl flights

Stansted to Dulles Intl flights

London City to Dulles Intl flights

Gatwick to Reagan-National flights

Luton to Dulles Intl flights

Edinburgh to Dulles Intl flights

Manchester to Dulles Intl flights

Manchester to Reagan-National flights

Edinburgh to Reagan-National flights

Newcastle upon Tyne to Dulles Intl flights

Birmingham to Dulles Intl flights

Birmingham to Reagan-National flights

Leeds to Dulles Intl flights

Southampton to Dulles Intl flights

London City to Reagan-National flights

Bristol to Dulles Intl flights

Newcastle upon Tyne to Reagan-National flights

Norwich to Dulles Intl flights

Norwich to Reagan-National flights

Bristol to Reagan-National flights

Leeds to Reagan-National flights

Southend to Dulles Intl flights

Southampton to Reagan-National flights

Doncaster to Dulles Intl flights

Grimsby to Dulles Intl flights

Grimsby to Reagan-National flights

Exeter to Dulles Intl flights

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

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£187	Average£571	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£317	Average£487	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
United Airlines	Cheapest£328	Average£517	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
TAP AIR PORTUGAL	Cheapest£329	Average£438	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	Cheapest£330	Average£523	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Aer Lingus	Cheapest£361	Average£666	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
KLM	Cheapest£373	Average£556	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air Canada	Cheapest£395	Average£568	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	Cheapest£399	Average£575	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Virgin Atlantic	Cheapest£405	Average£524	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Portsmouth to Washington, D.C. from £336

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 31/5. 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 April 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 April 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 April 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 April 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 April 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 18 April 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 April 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 April 2026.

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

Keep the following information in mind while searching for Portsmouth to Washington, D.C. flight deals. Data was last updated 18 April 2026.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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?

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 April 2026.

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

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Washington, D.C.. 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.?

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.?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portsmouth to Washington, D.C.

See prices for flight routes from nearby airports that may be better suited for you.

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

Book a non-stop flight to one of these other cities located in United States.

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 April 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Portsmouth to Washington, D.C. flights

Consider these flights travelling from Portsmouth to Washington, D.C..

Other flights to Washington, D.C.

Explore flights to Washington, D.C. departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 18 April 2026.

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 April 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 April 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 April 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 April 2026.