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

A quick flight from Portsmouth to Washington, D.C. can take about 20h 41m. Virgin Atlantic provides one of the quickest options available for as low as £547. The distance from Portsmouth to Washington, D.C. is about 3597 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 £1,423 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £448 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £563.

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

Consider KLM (92%), Air France (87%) or Delta (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.

£524+ 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 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 17 December 2025.

Tue 23/1217:30SOU - BWI

2 stops36h 05mDelta

Tue 30/1216:53BWI - SOU

2 stops34h 27mDelta

Deal found 15/12£710

Mon 22/1208:40SOU - BWI

2 stops43h 51mDelta

Wed 31/1212:34BWI - SOU

2 stops14h 46mDelta

Deal found 15/12£906

Fri 26/1208:40SOU - BWI

2 stops19h 51mDelta

Mon 29/1217:36BWI - SOU

2 stops42h 24mDelta

Deal found 15/12£927

Sun 21/1218:05SOU - BWI

2 stops27h 46mDelta

Wed 31/1212:34BWI - SOU

2 stops14h 46mDelta

Deal found 15/12£968

Tue 23/1216:50SOU - BWI

2 stops30h 55mBritish Airways

Sun 28/1220:35BWI - SOU

2 stops14h 45mBritish Airways

Deal found 15/12£1,335

Mon 22/1216:50SOU - BWI

2 stops54h 55mBritish Airways

Sun 28/1220:35BWI - SOU

2 stops14h 45mBritish Airways

Deal found 15/12£1,339

Fri 26/1212:20SOU - BWI

2 stops35h 25mBritish Airways

Sun 28/1220:35BWI - SOU

2 stops14h 45mBritish Airways

Deal found 15/12£1,375

Wed 24/1208:40SOU - IAD

2 stops16h 15mBritish Airways

Wed 31/1221:00IAD - SOU

1 stop17h 40mBritish Airways

Deal found 15/12£1,388

Tue 23/1219:55SOU - BWI

2 stops27h 50mBritish Airways

Thu 1/120:35BWI - SOU

2 stops17h 45mBritish Airways

Deal found 15/12£1,401

Mon 22/1216:50SOU - BWI

2 stops54h 55mBritish Airways

Thu 1/120:35BWI - SOU

2 stops17h 45mBritish Airways

Deal found 15/12£1,406

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 17 December 2025.

Thu 15/117:35SOU - BWI

2 stops29h 11mVirgin Atlantic

Thu 22/111:45BWI - SOU

2 stops40h 00mVirgin Atlantic

Deal found 16/12£524

Fri 30/109:00SOU - BWI

2 stops20h 41mDelta

Fri 6/206:00BWI - SOU

2 stops21h 45mDelta

Deal found 16/12£547

Thu 29/116:05SOU - IAD

1 stop28h 30mBritish Airways

Mon 2/217:05IAD - SOU

1 stop13h 50mBritish Airways

Deal found 16/12£563

Thu 15/117:35SOU - BWI

3 stops30h 05mMultiple Airlines

Thu 22/119:40BWI - SOU

2 stops19h 00mMultiple Airlines

Deal found 16/12£575

Fri 30/109:00SOU - DCA

2 stops18h 48mKLM

Fri 6/212:20DCA - SOU

2 stops15h 25mKLM

Deal found 16/12£639

Thu 15/109:00SOU - IAD

1 stop12h 05mVirgin Atlantic

Thu 22/118:05IAD - SOU

1 stop18h 00mVirgin Atlantic

Deal found 16/12£565

Thu 15/117:35SOU - IAD

3 stops29h 55mMultiple Airlines

Thu 22/119:40IAD - SOU

2 stops19h 00mMultiple Airlines

Deal found 16/12£575

Fri 30/120:10SOU - IAD

1 stop24h 25mBritish Airways

Fri 6/217:05IAD - SOU

1 stop10h 40mBritish Airways

Deal found 16/12£605

Thu 15/109:00SOU - DCA

2 stops18h 57mVirgin Atlantic

Thu 22/112:55DCA - SOU

2 stops14h 30mVirgin Atlantic

Deal found 16/12£569

Thu 5/219:00SOU - BWI

2 stops28h 45mBritish Airways

Sun 8/220:35BWI - SOU

2 stops16h 55mBritish Airways

Deal found 16/12£668

Fri 30/117:35SOU - IAD

3 stops26h 40mMultiple Airlines

Fri 6/219:40IAD - SOU

2 stops12h 30mMultiple Airlines

Deal found 16/12£737

Sat 27/1209:25SOU - BWI

2 stops19h 06mDelta

Wed 31/1212:34BWI - SOU

2 stops14h 46mDelta

Deal found 15/12£906

Fri 30/108:00SOU - BWI

3 stops20h 47mMultiple Airlines

Fri 6/219:40BWI - SOU

2 stops12h 30mMultiple Airlines

Deal found 16/12£777

Thu 5/215:00SOU - DCA

2 stops48h 03mBritish Airways

Mon 9/210:12DCA - SOU

2 stops20h 43mBritish Airways

Deal found 14/12£3,139

Last-minute flights from Portsmouth to Washington, D.C.
Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 17 December 2025 and is based on user searches.

Tue 23/1217:30SOU - BWI

2 stops36h 05mDelta

Tue 30/1216:53BWI - SOU

2 stops34h 27mDelta

Deal found 15/12£710

Thu 15/117:35SOU - BWI

2 stops29h 11mVirgin Atlantic

Thu 22/111:45BWI - SOU

2 stops40h 00mVirgin Atlantic

Deal found 16/12£524

Thu 15/109:00SOU - IAD

1 stop12h 05mVirgin Atlantic

Thu 22/112:32IAD - SOU

2 stops14h 53mVirgin Atlantic

Deal found 16/12£565

Thu 15/109:00SOU - DCA

2 stops18h 57mVirgin Atlantic

Thu 22/112:55DCA - SOU

2 stops14h 30mVirgin Atlantic

Deal found 16/12£569

Thu 15/117:35SOU - BWI

3 stops30h 05mMultiple Airlines

Thu 22/119:40BWI - SOU

2 stops19h 00mMultiple Airlines

Deal found 16/12£575

Thu 15/117:35SOU - IAD

3 stops29h 55mMultiple Airlines

Thu 22/119:40IAD - SOU

2 stops19h 00mMultiple Airlines

Deal found 16/12£575

Thu 29/116:05SOU - IAD

1 stop28h 30mBritish Airways

Mon 2/217:05IAD - SOU

1 stop13h 50mBritish Airways

Deal found 16/12£563

Fri 30/109:00SOU - BWI

2 stops20h 41mDelta

Fri 6/206:00BWI - SOU

2 stops21h 45mDelta

Deal found 16/12£547

Fri 30/120:10SOU - IAD

1 stop24h 25mBritish Airways

Fri 6/217:05IAD - SOU

1 stop10h 40mBritish Airways

Deal found 16/12£605

Fri 30/109:00SOU - DCA

2 stops18h 48mKLM

Fri 6/212:20DCA - SOU

2 stops15h 25mKLM

Deal found 16/12£639

Fri 30/117:35SOU - IAD

3 stops26h 40mMultiple Airlines

Fri 6/219:40IAD - SOU

2 stops12h 30mMultiple Airlines

Deal found 16/12£737

Fri 30/108:00SOU - BWI

3 stops20h 47mMultiple Airlines

Fri 6/219:40BWI - SOU

2 stops12h 30mMultiple Airlines

Deal found 16/12£777

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

Round-trip from	£524
Popular in	July
Cheapest in	February
Average price	£595

Virgin Atlantic
15/1-22/1
4 total stops
69h 11m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 12% potential increase in price (£58 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in December 2025

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

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 15/1

17:35-17:46

2 stops29h 11m

Baltimore/Washington

Thu 22/1

11:45-08:45

2 stops40h 00m

£524

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Fri 30/1

09:00-00:41

2 stops20h 41m

Baltimore/Washington

Fri 6/2

06:00-08:45

2 stops21h 45m

£547

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/1

16:05-15:35

1 stop28h 30m

Washington, D.C. Dulles Intl

Mon 2/2

17:05-11:55

1 stop13h 50m

£563

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 15/1

09:00-16:05

1 stop12h 05m

Washington, D.C. Dulles Intl

Thu 22/1

18:05-17:05

1 stop18h 00m

£565

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Thu 15/1

09:00-22:57

2 stops18h 57m

Washington, D.C. Reagan-National

Thu 22/1

12:55-08:25

2 stops14h 30m

£569

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 15/1

17:35-18:40

3 stops30h 05m

Baltimore/Washington

Thu 22/1

19:40-19:40

2 stops19h 00m

£575

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 15/1

17:35-18:30

3 stops29h 55m

Washington, D.C. Dulles Intl

Thu 22/1

19:40-19:40

2 stops19h 00m

£575

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 30/1

20:10-15:35

1 stop24h 25m

Washington, D.C. Dulles Intl

Fri 6/2

17:05-08:45

1 stop10h 40m

£605

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Fri 30/1

09:00-22:48

2 stops18h 48m

Washington, D.C. Reagan-National

Fri 6/2

12:20-08:45

2 stops15h 25m

£639

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Thu 5/2

19:00-18:45

2 stops28h 45m

Baltimore/Washington

Sun 8/2

20:35-18:30

2 stops16h 55m

£668

Flights are sorted by cheapest return flights first.

Deals found on 16/12

Showing 1-10 of 15 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 £228). Flying from Portsmouth to Washington, D.C. in July is currently the most expensive (average of £478). 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?

When flying from Portsmouth to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 19% versus a flight at midday.

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 Thursday evenings when fares are most often at their lowest. Sunday afternoons 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 (26 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (26 on average).

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with Aer Lingus from Portsmouth to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Aer Lingus

7.2

Good

1,395 reviews

Check prices

Reviews

1 / 20

6.0

Good

David,Oct 2025

DUB - IAD

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight from Dublin to Washington (Flight EI 119 on October 25, 2025) one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. Beyond being firm and actually nasty and rude. A little interpersonal communication training could help this man.

Aer Lingus

7.2

Good

1,395 reviews

Aer Lingus

7.2

Good

1,395 reviews

Check prices

Reviews

1 / 20

6.0

Good

David,Oct 2025

DUB - IAD

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 20h 41m. Virgin Atlantic provides one of the quickest options available for as low as £547. The distance from Portsmouth to Washington, D.C. is about 3597 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 KLM (92%), Air France (87%) or Delta (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 £1,423 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £448 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £563.
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 £228). Flying from Portsmouth to Washington, D.C. in July is currently the most expensive (average of £478). 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

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Alternative routes for Portsmouth to Washington, D.C.

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Norwich to Dulles Intl flights

Complete your trip

Washington, D.C. car hire

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

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£189	Average£573	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£268	Average£396	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
Icelandair	Cheapest£346	Average£532	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£349	Average£483	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Aer Lingus	Cheapest£383	Average£744	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
United Airlines	Cheapest£406	Average£571	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
JetBlue	Cheapest£414	Average£623	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Lufthansa	Cheapest£421	Average£643	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Finnair	Cheapest£422	Average£618	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Scandinavian Airlines	Cheapest£424	Average£574	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines 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 £524

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/1. 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 17 December 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 17 December 2025.

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 17 December 2025.

Round-trip 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 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 17 December 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 16 December 2024.

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

Reviews of airlines servicing Washington, D.C.

See what other customers who have flown with Aer Lingus from Portsmouth to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

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.?

What is the cheapest month to book a flight 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

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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.

Fly with Cheapflights

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How does Cheapflights help users find flights 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 17 December 2025.