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

A quick flight from Portsmouth to Washington, D.C. can take about 11h 25m. Aer Lingus provides one of the quickest options available for as low as £646. 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 - 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 £1,000 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £367 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £791.

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

Consider Air Canada (75%), Austrian Airlines (75%) or Copa Airlines (75%) 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.

£323+ 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 12 November 2026.

Fri 18/1209:20 -

1 stop11h 25m

Tue 22/1220:50 -

1 stop11h 10m

Deal found 12/11£646

Fri 18/1209:20 -

1 stop11h 25m

Sun 27/1217:15 -

1 stop10h 30m

Deal found 8/11£676

Thu 24/1208:40 -

1 stop12h 05m

Thu 31/1218:15 -

1 stop17h 50m

Deal found 9/11£696

Thu 24/1217:35 -

3 stops32h 25m

Thu 31/1217:25 -

3 stops34h 30m

Deal found 9/11£778

Fri 18/1209:20 -

1 stop11h 25m

Tue 22/1220:50 -

1 stop11h 10m

Deal found 12/11£790

Fri 18/1208:40 -

1 stop12h 15m

Wed 23/1206:00 -

2 stops21h 10m

Deal found 11/11£791

Fri 4/1209:20 -

1 stop11h 25m

Tue 8/1220:50 -

1 stop17h 40m

Deal found 11/11£797

Thu 10/1209:20 -

1 stop15h 00m

Thu 17/1220:50 -

1 stop30h 55m

Deal found 9/11£808

Thu 17/1212:25 -

1 stop11h 55m

Sun 3/121:45 -

2 stops16h 20m

Deal found 11/11£814

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

Round-trip from	£530
One-way from	£323
Popular in	June
Cheapest in	February
Average price	£506

Aer Lingus
27/2-5/3
2 total stops
21h 55m total
Portsmouth to Washington, D.C.

Search Deals

12/1-31/12
3 total stops
49h 00m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 9% potential increase in price (£40 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 November 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 17/12

13:55-19:05

3 stops34h 10m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£373

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 3/5

20:40-20:35

3 stops28h 55m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£382

Fastest return journey

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Sat 1/5

09:20-15:45

1 stop11h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£452

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 3/5

09:05-15:30

1 stop11h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£476

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 19/4

09:05-15:30

1 stop11h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£476

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Tue 12/1

08:40-23:17

2 stops19h 37m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£476

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 17/12

09:20-19:20

1 stop15h 00m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£479

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 23/11

09:20-19:20

1 stop15h 00m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£479

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Fri 18/12

09:20-15:45

1 stop11h 25m

Washington, D.C. Dulles Intl

Tue 22/12

20:50-13:00

1 stop11h 10m

£646

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 24/12

08:40-15:45

1 stop12h 05m

Washington, D.C. Dulles Intl

Thu 31/12

18:15-17:05

1 stop17h 50m

£696

Flights are sorted by cheapest return flights first.

Deals found on 8/11

Showing 1-10 of 17 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

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

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 Monday (27 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (19 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 11h 25m. Aer Lingus provides one of the quickest options available for as low as £646. 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 - 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 (75%), Austrian Airlines (75%) or Copa Airlines (75%) 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 £1,000 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £367 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £791.
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

London City to Dulles Intl flights

Stansted to Dulles Intl flights

Heathrow to Reagan-National flights

Luton to Dulles Intl flights

Gatwick to Reagan-National flights

London City to Reagan-National flights

Manchester to Dulles Intl flights

Manchester to Reagan-National flights

Birmingham to Dulles Intl flights

Edinburgh to Dulles Intl flights

Birmingham to Reagan-National flights

Southend to Dulles Intl flights

Edinburgh to Reagan-National flights

Newcastle upon Tyne to Reagan-National flights

Newcastle upon Tyne to Dulles Intl flights

Leeds to Dulles Intl flights

Bristol to Dulles Intl flights

Southampton to Dulles Intl flights

Bristol to Reagan-National flights

Leeds to Reagan-National flights

Grimsby to Dulles Intl flights

Exeter to Dulles Intl flights

Norwich to Reagan-National flights

Norwich to Dulles Intl flights

Doncaster to Dulles Intl flights

Southampton to Reagan-National flights

Grimsby to Reagan-National flights

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

Airline	Cheapest	Average	Flexibility	On-time
Virgin Atlantic	Cheapest£272	Average£530	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Icelandair	Cheapest£288	Average£491	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£344	Average£467	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
KLM	Cheapest£380	Average£583	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Aer Lingus	Cheapest£404	Average£596	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
United Airlines	Cheapest£411	Average£582	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Scandinavian Airlines	Cheapest£413	Average£522	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Lufthansa	Cheapest£415	Average£548	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
British Airways	Cheapest£416	Average£570	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Iberia	Cheapest£420	Average£614	FlexibilityNo cancel fee	On-time77%	Search Iberia 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 £323

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/1. 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 12 November 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 12 November 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 12 November 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 12 November 2026.

Last-minute flights from Portsmouth to Washington, D.C.Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 12 November 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 12 November 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 12 November 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 12 November 2026.

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

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

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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 12 November 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 Monday (27 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (19 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

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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 12 November 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 12 November 2026.

Last-minute flights from Portsmouth to Washington, D.C.
Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 12 November 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 12 November 2026.