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

A quick flight from Portsmouth to Washington, D.C. can take about 18h 44m. Aer Lingus provides one of the quickest options available for as low as £653. The distance from Portsmouth to Washington, D.C. is about 3626 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 - Washington, D.C. Dulles Intl. You may also consider Southampton Eastleigh - Baltimore/Washington 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 £1,443 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £431 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £588.

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

Consider Air Canada (86%), Austrian Airlines (86%) or Copa Airlines (86%) 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.

£438+ 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 22 August 2026.

Fri 2/1020:00 -

2 stops24h 30m

Fri 9/1017:10 -

2 stops18h 40m

Deal found 18/8£549

Thu 29/1009:20 -

2 stops36h 00m

Thu 5/1117:50 -

2 stops20h 40m

Deal found 17/8£551

Sun 4/1009:20 -

1 stop11h 25m

Sun 11/1017:15 -

1 stop18h 35m

Deal found 20/8£570

Mon 5/1009:20 -

1 stop11h 25m

Mon 12/1020:55 -

1 stop17h 35m

Deal found 21/8£622

Thu 29/1008:40 -

2 stops30h 14m

Thu 5/1109:00 -

2 stops18h 10m

Deal found 17/8£653

Sat 3/1009:15 -

2 stops18h 44m

Sat 10/1009:10 -

2 stops18h 35m

Deal found 19/8£653

Fri 2/1009:05 -

2 stops18h 57m

Fri 9/1011:05 -

2 stops16h 40m

Deal found 18/8£654

Thu 29/1008:40 -

2 stops18h 18m

Thu 5/1106:00 -

2 stops21h 10m

Deal found 20/8£655

Mon 5/1009:05 -

2 stops19h 19m

Mon 12/1019:40 -

2 stops16h 10m

Deal found 21/8£657

Mon 5/1009:05 -

2 stops18h 54m

Mon 12/1019:22 -

2 stops16h 28m

Deal found 21/8£657

Sun 4/1017:20 -

2 stops29h 06m

Sun 11/1013:03 -

2 stops14h 32m

Deal found 19/8£660

Sat 5/917:20 -

2 stops28h 29m

Fri 18/907:05 -

2 stops20h 40m

Deal found 21/8£687

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 22 August 2026.

Thu 29/1009:20 -

2 stops36h 00m

Thu 5/1121:00 -

1 stop14h 35m

Deal found 17/8£574

Thu 29/1009:20 -

2 stops36h 00m

Thu 5/1121:45 -

2 stops16h 45m

Deal found 19/8£630

Thu 29/1017:30 -

1 stop27h 25m

Thu 5/1117:45 -

1 stop18h 15m

Deal found 17/8£649

Sat 3/1009:15 -

2 stops18h 44m

Sat 10/1009:10 -

2 stops18h 35m

Deal found 19/8£653

Wed 7/1009:20 -

1 stop11h 25m

Wed 14/1017:15 -

1 stop18h 35m

Deal found 18/8£732

Thu 29/1008:40 -

2 stops30h 14m

Thu 5/1109:00 -

2 stops18h 10m

Deal found 19/8£653

Fri 2/1009:05 -

2 stops18h 57m

Fri 9/1011:05 -

2 stops16h 40m

Deal found 18/8£654

Thu 29/1008:40 -

2 stops18h 18m

Thu 5/1106:00 -

2 stops21h 10m

Deal found 20/8£655

Sun 4/1017:20 -

2 stops29h 06m

Sun 11/1013:03 -

2 stops14h 32m

Deal found 19/8£660

Fri 2/1020:00 -

2 stops28h 40m

Fri 9/1021:30 -

2 stops17h 00m

Deal found 18/8£747

Mon 5/1009:05 -

2 stops19h 19m

Mon 12/1019:40 -

2 stops16h 10m

Deal found 21/8£657

Wed 18/1106:50 -

2 stops39h 15m

Sun 22/1118:55 -

2 stops32h 30m

Deal found 18/8£812

Mon 5/1009:05 -

2 stops18h 54m

Mon 12/1019:22 -

2 stops16h 28m

Deal found 21/8£657

Fri 2/1009:25 -

3 stops28h 30m

Fri 9/1012:50 -

3 stops25h 40m

Deal found 18/8£887

Sat 5/909:15 -

1 stop11h 20m

Mon 14/918:10 -

1 stop9h 25m

Deal found 21/8£684

Thu 10/917:20 -

1 stop27h 15m

Mon 14/912:25 -

2 stops15h 10m

Deal found 21/8£684

Sat 3/1020:00 -

3 stops31h 34m

Sat 10/1018:55 -

2 stops19h 35m

Deal found 19/8£983

Sun 6/909:15 -

1 stop11h 20m

Sat 12/918:26 -

2 stops17h 24m

Deal found 21/8£684

Wed 9/909:15 -

2 stops17h 13m

Fri 18/907:05 -

2 stops20h 40m

Deal found 21/8£687

Thu 10/917:20 -

2 stops29h 07m

Fri 18/907:05 -

2 stops20h 40m

Deal found 21/8£687

Sat 5/909:15 -

2 stops17h 50m

Sat 12/911:45 -

2 stops16h 00m

Deal found 21/8£687

Sat 5/909:15 -

2 stops18h 44m

Wed 16/912:55 -

2 stops14h 40m

Deal found 21/8£687

Tue 8/917:20 -

2 stops28h 12m

Wed 16/912:55 -

2 stops14h 40m

Deal found 21/8£687

Sat 5/909:15 -

2 stops17h 50m

Sun 13/911:40 -

2 stops15h 55m

Deal found 21/8£687

Wed 16/1208:40 -

2 stops15h 37m

Tue 5/113:00 -

2 stops14h 10m

Deal found 21/8£772

Tue 15/1208:40 -

2 stops14h 19m

Sat 2/112:59 -

2 stops14h 56m

Deal found 21/8£772

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

Round-trip from	£549
One-way from	£438
Popular in	June
Cheapest in	February
Average price	£522

Aer Lingus
2/10-9/10
4 total stops
43h 10m total
Portsmouth to Washington, D.C.

Search Deals

23/11
2 total stops
24h 40m 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 August 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

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

21:00-16:35

1 stop14h 35m

£574

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

21:45-19:30

2 stops16h 45m

£630

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

17:30-16:55

1 stop27h 25m

Washington, D.C. Dulles Intl

Thu 5/11

17:45-17:00

1 stop18h 15m

£649

SouthamptonWashington, D.C.

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

SOUDCA

Southampton Eastleigh

Sat 3/10

09:15-22:59

2 stops18h 44m

Washington, D.C. Reagan-National

Sat 10/10

09:10-08:45

2 stops18h 35m

£653

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Thu 29/10

08:40-10:54

2 stops30h 14m

Baltimore/Washington

Thu 5/11

09:00-08:10

2 stops18h 10m

£653

SouthamptonWashington, D.C.

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

SOUDCA

Southampton Eastleigh

Fri 2/10

09:05-23:02

2 stops18h 57m

Washington, D.C. Reagan-National

Fri 9/10

11:05-08:45

2 stops16h 40m

£654

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Thu 29/10

08:40-22:58

2 stops18h 18m

Baltimore/Washington

Thu 5/11

06:00-08:10

2 stops21h 10m

£655

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Mon 5/10

09:05-23:24

2 stops19h 19m

Baltimore/Washington

Mon 12/10

19:40-16:50

2 stops16h 10m

£657

SouthamptonWashington, D.C.

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

SOUDCA

Southampton Eastleigh

Mon 5/10

09:05-22:59

2 stops18h 54m

Washington, D.C. Reagan-National

Mon 12/10

19:22-16:50

2 stops16h 28m

£657

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Sun 4/10

17:20-17:26

2 stops29h 06m

Baltimore/Washington

Sun 11/10

13:03-08:35

2 stops14h 32m

£660

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 38 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 Thursday (29 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 18h 44m. Aer Lingus provides one of the quickest options available for as low as £653. The distance from Portsmouth to Washington, D.C. is about 3626 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 - 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 (86%), Austrian Airlines (86%) or Copa Airlines (86%) 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 £1,443 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £431 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £588.
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

Heathrow to Reagan-National flights

Stansted to Dulles Intl flights

Gatwick to Dulles Intl flights

London City to Dulles Intl flights

Gatwick to Reagan-National flights

Luton to Dulles Intl flights

Manchester to Dulles Intl flights

Edinburgh to Dulles Intl flights

London City to Reagan-National flights

Manchester to Reagan-National flights

Edinburgh to Reagan-National flights

Leeds to Dulles Intl flights

Birmingham to Dulles Intl flights

Birmingham to Reagan-National flights

Leeds to Reagan-National flights

Newcastle upon Tyne to Dulles Intl flights

Southampton to Dulles Intl flights

Newcastle upon Tyne to Reagan-National flights

Bristol to Dulles Intl flights

Exeter to Dulles Intl flights

Norwich to Reagan-National flights

Southampton to Reagan-National flights

Grimsby to Dulles Intl flights

Norwich to Dulles Intl flights

Grimsby to Reagan-National flights

Bristol to Reagan-National flights

Doncaster to Dulles Intl flights

Southend to Dulles Intl flights

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

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£281	Average£460	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Virgin Atlantic	Cheapest£323	Average£516	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Aer Lingus	Cheapest£358	Average£579	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
KLM	Cheapest£374	Average£558	FlexibilityNo cancel fee	On-time75%	Search KLM flights
TAP AIR PORTUGAL	Cheapest£377	Average£443	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Lufthansa	Cheapest£397	Average£537	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£398	Average£542	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
United Airlines	Cheapest£399	Average£532	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air France	Cheapest£401	Average£637	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Scandinavian Airlines	Cheapest£403	Average£469	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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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 £438

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.

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 22 August 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 22 August 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 22 August 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 22 August 2026.

Last-minute flights from Portsmouth to Washington, D.C.Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 22 August 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 22 August 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 22 August 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 22 August 2026.

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

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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 22 August 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 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.?

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.

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

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Portsmouth and Washington, D.C. flights

Browse other Portsmouth and Washington, D.C. flight options. Last updated on 22 August 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 22 August 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 22 August 2026.

Last-minute flights from Portsmouth to Washington, D.C.
Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 22 August 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 22 August 2026.