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

A quick flight from Portsmouth to Washington, D.C. can take about 11h 10m. Aer Lingus provides one of the quickest options available for as low as £580. 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 £1,385 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £412 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £580.

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

Consider KLM (75%), Air France (75%) or Delta (75%) 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 Canada and Air France. 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 51 days in advance to save up to 48% 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 51 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 £538, or £804 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 £545 on average during February, but can be found for as low as £226.

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.

£553+ Flights from Portsmouth to Washington, D.C.

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

Round-trip from	£553
Popular in	July
Cheapest in	February
Average price	£616

10/10-17/10
3 total stops
49h 00m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£54 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 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 28 August 2025.

Fri 10/1020:00SOU - IAD

1 stop24h 35mMultiple Airlines

Fri 17/1010:20IAD - SOU

2 stops24h 25mMultiple Airlines

Deal found 25/8£553

Sat 11/1009:40SOU - IAD

1 stop11h 10mAer Lingus

Sat 18/1017:20IAD - SOU

1 stop10h 15mAer Lingus

Deal found 27/8£580

Sat 11/1009:40SOU - IAD

2 stops14h 40mMultiple Airlines

Sat 18/1020:30IAD - SOU

2 stops18h 00mMultiple Airlines

Deal found 27/8£616

Fri 10/1009:40SOU - IAD

1 stop14h 15mAer Lingus

Fri 17/1017:20IAD - SOU

1 stop10h 20mAer Lingus

Deal found 26/8£625

Sat 11/1009:20SOU - IAD

1 stop11h 15mVirgin Atlantic

Sat 18/1006:00IAD - SOU

2 stops21h 45mVirgin Atlantic

Deal found 27/8£636

Sat 11/1009:20SOU - DCA

2 stops18h 39mDelta

Sat 18/1012:31DCA - SOU

2 stops15h 14mDelta

Deal found 27/8£664

Fri 10/1009:20SOU - IAD

1 stop11h 15mKLM

Fri 17/1017:25IAD - SOU

1 stop19h 05mKLM

Deal found 25/8£677

Fri 10/1009:20SOU - IAD

2 stops42h 40mVirgin Atlantic

Fri 17/1015:33IAD - SOU

2 stops36h 12mVirgin Atlantic

Deal found 25/8£687

Sat 11/1009:40SOU - BWI

2 stops15h 05mMultiple Airlines

Sat 18/1021:35BWI - SOU

2 stops30h 35mMultiple Airlines

Deal found 27/8£722

Sat 11/1016:25SOU - DCA

3 stops34h 26mMultiple Airlines

Sat 18/1018:50DCA - SOU

2 stops18h 00mMultiple Airlines

Deal found 27/8£1,062

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 28 August 2025.

Fri 10/1020:00SOU - IAD

1 stop24h 35mMultiple Airlines

Fri 17/1010:20IAD - SOU

2 stops24h 25mMultiple Airlines

Deal found 25/8£553

Sat 11/1009:40SOU - IAD

1 stop11h 10mAer Lingus

Sat 18/1017:20IAD - SOU

1 stop10h 15mAer Lingus

Deal found 27/8£580

Sat 11/1009:20SOU - IAD

1 stop11h 15mVirgin Atlantic

Sat 18/1006:00IAD - SOU

2 stops21h 45mVirgin Atlantic

Deal found 27/8£636

Sat 11/1009:20SOU - DCA

2 stops18h 39mDelta

Sat 18/1012:31DCA - SOU

2 stops15h 14mDelta

Deal found 27/8£664

Fri 10/1009:20SOU - IAD

1 stop11h 15mKLM

Fri 17/1017:25IAD - SOU

1 stop19h 05mKLM

Deal found 25/8£677

Sat 11/1009:40SOU - IAD

2 stops14h 40mMultiple Airlines

Sat 18/1020:30IAD - SOU

2 stops18h 00mMultiple Airlines

Deal found 27/8£616

Fri 10/1009:40SOU - IAD

1 stop14h 15mAer Lingus

Fri 17/1017:20IAD - SOU

1 stop10h 20mAer Lingus

Deal found 26/8£625

Fri 10/1009:20SOU - IAD

2 stops42h 40mVirgin Atlantic

Fri 17/1015:33IAD - SOU

2 stops36h 12mVirgin Atlantic

Deal found 25/8£687

Sat 11/1009:40SOU - BWI

2 stops15h 05mMultiple Airlines

Sat 18/1021:35BWI - SOU

2 stops30h 35mMultiple Airlines

Deal found 27/8£722

Sat 11/1016:25SOU - DCA

3 stops34h 26mMultiple Airlines

Sat 18/1018:50DCA - SOU

2 stops18h 00mMultiple Airlines

Deal found 27/8£1,062

Last-minute flights from Portsmouth to Washington, D.C.
Discover last-minute flight deals from Portsmouth to Washington, D.C.. Data last updated 28 August 2025 and is based on user searches.

Sat 30/809:40SOU - IAD

1 stop11h 10mBritish Airways

Sat 13/917:20IAD - SOU

1 stop10h 15mBritish Airways

Deal found 25/8£2,156

Sat 20/909:55SOU - IAD

2 stops15h 20mBritish Airways

Sat 27/917:20IAD - SOU

1 stop10h 15mBritish Airways

Deal found 26/8£1,088

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 28 August 2025.

Mon 1/1219:40SOU - BWI

2 stops28h 05mBritish Airways

Deal found 26/8£1,054

Sun 30/1113:40SOU - IAD

2 stops35h 15mBritish Airways

Deal found 26/8£1,054

Mon 1/1208:40SOU - IAD

2 stops16h 15mBritish Airways

Deal found 27/8£1,054

Fri 28/1116:30SOU - BWI

2 stops31h 15mBritish Airways

Deal found 26/8£1,096

Fri 28/1116:30SOU - IAD

2 stops32h 25mBritish Airways

Deal found 26/8£1,096

Thu 27/1119:55SOU - BWI

2 stops27h 50mBritish Airways

Deal found 26/8£1,097

Thu 27/1119:55SOU - IAD

2 stops29h 00mBritish Airways

Deal found 26/8£1,097

Sun 30/1118:05SOU - IAD

1 stop27h 00mDelta

Deal found 26/8£1,215

Sun 30/1118:05SOU - DCA

2 stops34h 53mDelta

Deal found 26/8£1,219

Fri 28/1108:40SOU - IAD

1 stop12h 25mDelta

Deal found 26/8£1,257

Fri 28/1117:30SOU - DCA

2 stops28h 30mDelta

Deal found 26/8£1,262

Sat 13/909:40SOU - IAD

1 stop14h 15mBritish Airways

Deal found 26/8£2,135

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

Fri 10/10

20:00-15:35

1 stop24h 35m

Washington, D.C. Dulles Intl

Fri 17/10

10:20-15:45

2 stops24h 25m

£553

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 11/10

09:40-15:50

1 stop11h 10m

Washington, D.C. Dulles Intl

Sat 18/10

17:20-08:35

1 stop10h 15m

£580

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 11/10

09:40-19:20

2 stops14h 40m

Washington, D.C. Dulles Intl

Sat 18/10

20:30-19:30

2 stops18h 00m

£616

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 10/10

09:40-18:55

1 stop14h 15m

Washington, D.C. Dulles Intl

Fri 17/10

17:20-08:40

1 stop10h 20m

£625

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sat 11/10

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Sat 18/10

06:00-08:45

2 stops21h 45m

£636

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Sat 11/10

09:20-22:59

2 stops18h 39m

Washington, D.C. Reagan-National

Sat 18/10

12:31-08:45

2 stops15h 14m

£664

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 10/10

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Fri 17/10

17:25-17:30

1 stop19h 05m

£677

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 10/10

09:20-23:00

2 stops42h 40m

Washington, D.C. Dulles Intl

Fri 17/10

15:33-08:45

2 stops36h 12m

£687

SouthamptonBaltimore

SOU - BWI

SOUBWI

Southampton Eastleigh

Sat 11/10

09:40-19:45

2 stops15h 05m

Baltimore/Washington

Sat 18/10

21:35-09:10

2 stops30h 35m

£722

SouthamptonWashington, D.C.

SOU - DCA

SOUDCA

Southampton Eastleigh

Sat 11/10

16:25-21:51

3 stops34h 26m

Washington, D.C. Reagan-National

Sat 18/10

18:50-17:50

2 stops18h 00m

£1,062

Flights are sorted by cheapest return flights first.

Deals found on 26/8

Showing 1-10 of 38 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, January is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. (average of £599). Flying from Portsmouth to Washington, D.C. in July is currently the most expensive (average of £947). 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 (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 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

1,239 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jul 2025

DUB - ORD

The inability to check in with the final leg of our flight via the Aers Lingus app led to a stressful trip as the final leg was overbooked and we were not able to confirm a seat until we had arrived to Chicago. Lack of earphones for the "entertainment" system were not voluntarily provided or even referenced as available (even for a charge) while boarding the plane - this seems like an oversight.

Aer Lingus

7.2

Good

1,239 reviews

Aer Lingus

7.2

Good

1,239 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jul 2025

DUB - ORD

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 10m. Aer Lingus provides one of the quickest options available for as low as £580. 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 KLM (75%), Air France (75%) or Delta (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 £1,385 for a flight from Portsmouth to Washington, D.C.. The cheapest flight overall is £412 while the most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl) is currently priced at £580.
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, January is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. (average of £599). Flying from Portsmouth to Washington, D.C. in July is currently the most expensive (average of £947). 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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Complete your trip

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

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£188	Average£532	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£248	Average£390	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
Icelandair	Cheapest£346	Average£511	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£352	Average£512	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
JetBlue	Cheapest£374	Average£626	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Finnair	Cheapest£437	Average£613	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Air France	Cheapest£437	Average£587	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Scandinavian Airlines	Cheapest£438	Average£574	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Lufthansa	Cheapest£439	Average£618	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£444	Average£634	FlexibilityNo cancel fee	On-time69%	Search United 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 £553

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/10. 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 28 August 2025.

Round-trip 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 28 August 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 28 August 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 28 August 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.

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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.?

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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 28 August 2025.