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. Reagan-National or Southampton Eastleigh - Washington, D.C. Dulles Intl.

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

On average you can expect to pay £1,542 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £497 while the most popular route, (Southampton Eastleigh - Baltimore/Washington) is currently priced at £695.

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

Consider American Airlines (57%), Aer Lingus (57%) or Finnair (57%) when booking your flight. These represent the most reliable airlines when flying from Portsmouth to Washington, D.C..

What are the most popular airlines that fly from Portsmouth to Washington, D.C.?

The most popular airlines flying from Portsmouth to Washington, D.C. are American Airlines, Air France and Finnair. Something to consider prior to booking your flight.

How far in advance should I book a flight from Portsmouth to Washington, D.C.?

Travelers have found it’s best to book a flight 50 days in advance to save up to 35% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 50 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Portsmouth to Washington, D.C. 1-2 weeks in advance for as low as £550, or £695 for flights within the next 24 hours.

What is the cheapest month to fly from Portsmouth to Washington, D.C.?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, February can be a great choice for travel to Washington, D.C.. Flights to Washington, D.C. from Portsmouth in February are about £566 on average during February, but can be found for as low as £236.

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.

£373+ Flights from Portsmouth to Washington, D.C.

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

Round-trip from	£622
One-way from	£373
Popular in	July
Cheapest in	February
Average price	£527

KLM
15/5-22/5
2 total stops
37h 20m total
Portsmouth to Washington, D.C.

Search Deals

17/8
2 total stops
31h 05m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£62 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 March 2025

Search Deals

Find 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 31 March 2025.

Thu 15/517:35SOU - IAD

1 stop27h 00mKLM

Thu 22/517:25IAD - SOU

1 stop10h 20mKLM

Deal found 31/3£622

Thu 15/509:40SOU - IAD

2 stops31h 05mMultiple Airlines

Thu 22/513:30IAD - SOU

2 stops25h 00mMultiple Airlines

Deal found 31/3£723

Thu 15/520:00SOU - BWI

2 stops26h 40mMultiple Airlines

Thu 22/505:35BWI - SOU

3 stops33h 00mMultiple Airlines

Deal found 31/3£752

Thu 15/517:35SOU - DCA

2 stops34h 10mVirgin Atlantic

Thu 22/518:55DCA - SOU

2 stops56h 50mVirgin Atlantic

Deal found 31/3£785

Wed 9/409:20SOU - IAD

1 stop11h 15mDelta

Wed 16/417:25IAD - SOU

1 stop10h 20mDelta

Deal found 30/3£794

Fri 1/809:40SOU - IAD

1 stop11h 10mAer Lingus

Thu 28/820:25IAD - SOU

1 stop18h 05mAer Lingus

Deal found 31/3£796

Tue 8/409:20SOU - BWI

2 stops17h 36mDelta

Tue 15/412:00BWI - SOU

2 stops15h 45mDelta

Deal found 30/3£798

Tue 8/409:20SOU - DCA

2 stops14h 56mDelta

Mon 14/415:25DCA - SOU

2 stops12h 25mDelta

Deal found 30/3£798

Thu 15/520:00SOU - DCA

3 stops30h 53mMultiple Airlines

Thu 22/518:50DCA - SOU

2 stops15h 45mMultiple Airlines

Deal found 31/3£901

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 31 March 2025.

Thu 15/517:35SOU - IAD

1 stop27h 00mKLM

Thu 22/517:25IAD - SOU

1 stop10h 20mKLM

Deal found 31/3£622

Thu 15/509:40SOU - IAD

2 stops31h 05mMultiple Airlines

Thu 22/513:30IAD - SOU

2 stops25h 00mMultiple Airlines

Deal found 31/3£723

Thu 15/517:35SOU - DCA

2 stops34h 10mVirgin Atlantic

Thu 22/518:55DCA - SOU

2 stops56h 50mVirgin Atlantic

Deal found 31/3£785

Sat 12/409:20SOU - IAD

1 stop11h 15mDelta

Tue 15/417:25IAD - SOU

1 stop10h 20mDelta

Deal found 30/3£794

Fri 1/809:40SOU - IAD

1 stop11h 10mAer Lingus

Thu 28/820:25IAD - SOU

1 stop18h 05mAer Lingus

Deal found 31/3£796

Thu 15/520:00SOU - BWI

2 stops26h 40mMultiple Airlines

Thu 22/505:35BWI - SOU

3 stops33h 00mMultiple Airlines

Deal found 31/3£752

Thu 15/520:00SOU - DCA

3 stops30h 53mMultiple Airlines

Thu 22/518:50DCA - SOU

2 stops15h 45mMultiple Airlines

Deal found 31/3£901

Last-minute flights from Portsmouth to Washington, D.C.
Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 31 March 2025 and is based on user searches.

Tue 8/409:20SOU - BWI

2 stops17h 36mDelta

Mon 14/414:35BWI - SOU

2 stops13h 15mDelta

Deal found 30/3£798

Tue 8/409:20SOU - DCA

2 stops14h 56mDelta

Mon 14/415:25DCA - SOU

2 stops12h 25mDelta

Deal found 30/3£798

Wed 9/409:20SOU - IAD

1 stop11h 15mDelta

Tue 15/417:25IAD - SOU

1 stop10h 20mDelta

Deal found 30/3£794

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 31 March 2025.

Sun 17/815:35SOU - BWI

2 stops31h 05mMultiple Airlines

Deal found 30/3£373

Mon 18/820:00SOU - IAD

2 stops28h 59mMultiple Airlines

Deal found 30/3£393

Sun 11/520:00SOU - IAD

1 stop27h 55mAer Lingus

Deal found 30/3£484

Mon 7/417:35SOU - IAD

2 stops35h 53mDelta

Deal found 30/3£1,302

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

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 15/5

17:35-15:35

1 stop27h 00m

Washington, D.C. Dulles Intl

Thu 22/5

17:25-08:45

1 stop10h 20m

£622

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 15/5

09:40-11:45

2 stops31h 05m

Washington, D.C. Dulles Intl

Thu 22/5

13:30-19:30

2 stops25h 00m

£723

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 15/5

20:00-17:40

2 stops26h 40m

Baltimore/Washington

Thu 22/5

05:35-19:35

3 stops33h 00m

£752

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Thu 15/5

17:35-22:45

2 stops34h 10m

Washington, D.C. Reagan-National

Thu 22/5

18:55-08:45

2 stops56h 50m

£785

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 12/4

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Tue 15/4

17:25-08:45

1 stop10h 20m

£794

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 1/8

09:40-15:50

1 stop11h 10m

Washington, D.C. Dulles Intl

Thu 28/8

20:25-19:30

1 stop18h 05m

£796

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Thu 15/5

20:00-21:53

3 stops30h 53m

Washington, D.C. Reagan-National

Thu 22/5

18:50-15:35

2 stops15h 45m

£901

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sun 17/8

15:35-17:40

2 stops31h 05m

£373

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Mon 18/8

20:00-19:59

2 stops28h 59m

£393

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 11/5

20:00-18:55

1 stop27h 55m

£484

Flights are sorted by cheapest return flights first.

Deals found on 30/3

Showing 1-10 of 11 results

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.

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.

What is the cheapest month to book a flight from Portsmouth to Washington, D.C.?

Currently, February is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. (average of £565). Flying from Portsmouth to Washington, D.C. in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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.

What is the cheapest day to fly from Portsmouth to Washington, D.C.?

Travellers seeking maximum savings on their Portsmouth to Washington, D.C. flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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

The most flights from P0R to WAS are scheduled on a Monday (25 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Rainfall in Washington, D.C. by month

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.

Temperature in Washington, D.C. by month

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).

Reviews of airlines servicing Washington, D.C.

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta

8.0

Very Good

7,899 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Virgin Atlantic

7.4

Good

636 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus

7.0

Good

1,061 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 - Baltimore/Washington. You may also consider Southampton Eastleigh - Washington, D.C. Reagan-National or Southampton Eastleigh - Washington, D.C. Dulles Intl.
What are the most reliable airlines from Portsmouth to Washington, D.C.?
Consider American Airlines (57%), Aer Lingus (57%) or Finnair (57%) 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 £1,542 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £497 while the most popular route, (Southampton Eastleigh - Baltimore/Washington) is currently priced at £695.
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.
What is the cheapest month to book a flight from Portsmouth to Washington, D.C.?
Currently, February is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. (average of £565). Flying from Portsmouth to Washington, D.C. in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Silver Spring

Arlington

Woodbridge

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Laurel

Tysons

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Alternative routes for Portsmouth to Washington, D.C.

Heathrow to Dulles Intl flights

Heathrow to Reagan-National flights

Gatwick to Dulles Intl flights

London City to Dulles Intl flights

Gatwick to Reagan-National flights

London City to Reagan-National flights

Stansted to Dulles Intl flights

Manchester to Dulles Intl flights

Luton to Dulles Intl flights

Manchester to Reagan-National flights

Edinburgh to Dulles Intl flights

Birmingham to Dulles Intl flights

Newcastle upon Tyne to Dulles Intl flights

Birmingham to Reagan-National flights

Edinburgh to Reagan-National flights

Newcastle upon Tyne to Reagan-National flights

Bristol to Dulles Intl flights

Bristol to Reagan-National flights

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Leeds to Dulles Intl flights

Southend to Dulles Intl flights

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Norwich to Dulles Intl flights

Grimsby to Reagan-National flights

Exeter to Dulles Intl flights

Doncaster to Dulles Intl flights

Norwich to Reagan-National flights

Complete your trip

Washington, D.C. car hire

Baltimore/Washington Airport car hire

Washington, D.C. Dulles Intl Airport car hire

Washington, D.C. Reagan-National Airport car hire

Dupont Circle car hire

Downtown car hire

Georgetown car hire

Capitol Hill car hire

Foggy Bottom - West End car hire

Southwest Waterfront car hire

Columbia Heights car hire

Adams Morgan car hire

Direct flights to United States

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

Airline	Cheapest	Average	Flexibility	On-time
PLAY	Cheapest£258	Average£484	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
Delta	Cheapest£331	Average£790	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£360	Average£554	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£364	Average£614	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Brussels Airlines	Cheapest£396	Average£742	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
JetBlue	Cheapest£396	Average£593	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Scandinavian Airlines	Cheapest£456	Average£596	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Air France	Cheapest£456	Average£629	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Finnair	Cheapest£468	Average£640	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
KLM	Cheapest£477	Average£696	FlexibilityNo cancel fee	On-time75%	Search KLM 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.

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Cheap flights from Portsmouth to Washington, D.C. from £373

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 17/8. 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.

Keep the following information in mind while searching for Portsmouth to Washington, D.C. flight deals. Data was last updated 31 March 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 31 March 2025.

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 31 March 2025.

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 month to book a 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 31 March 2025.

What is the cheapest day to fly from Portsmouth to Washington, D.C.?

Use this chart to determine the cheapest time to fly return from Portsmouth to Washington, D.C.. Price data was last updated on 30 June 2024.

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

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Reviews of airlines servicing 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.

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.?

What is the cheapest month to book a flight from Portsmouth to Washington, D.C.?

Travelling to a place near Portsmouth?

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Alternative routes for Portsmouth to Washington, D.C.

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

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

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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?

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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 31 March 2025.