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

Virgin Atlantic can get you from Portsmouth to Washington, D.C. Dulles Intl Airport in just under 27h. Your travel time can differ by up to . Airlines will cover a distance of 3639 mi.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 cheapest flights from Portsmouth to Washington, D.C. Dulles Intl Airport?

The cheapest flight price from Portsmouth to Washington, D.C. Dulles Intl Airport is £388. On average you can expect to pay £1,459. The most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl), can usually be booked for £589.

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

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portsmouth to Washington, D.C. Dulles Intl Airport on time: KLM (89%), Air France (89%), Delta (89%).

Can I find deals for flights from Portsmouth to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Portsmouth to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Portsmouth to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Dulles Intl.

Can I find deals for business class flights from Portsmouth to Dulles Intl?

Yes. Cheapflights offers flight deals from Portsmouth to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£586+ Cheap Flights from Portsmouth to Washington, D.C. Dulles Intl Airport

Cheap flight deals from Portsmouth to Dulles Intl

Round-trip from	£586
Popular in	July
Cheapest in	February
Average price	£555

Virgin Atlantic
5/3-9/3
2 total stops
30h 10m total
Portsmouth to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 11% potential increase in price (£52 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 October 2025

Search Deals

Find flight deals from Portsmouth to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Dulles Intl
Explore the most affordable flight options available from Portsmouth to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.

Sun 30/1118:05SOU - IAD

1 stop27h 00mVirgin Atlantic

Sun 7/1218:05IAD - SOU

1 stop18h 20mVirgin Atlantic

Deal found 16/10£651

Sun 30/1118:05SOU - IAD

1 stop27h 00mKLM

Sun 7/1218:05IAD - SOU

1 stop18h 20mKLM

Deal found 16/10£664

Sun 30/1119:40SOU - IAD

2 stops24h 55mMultiple Airlines

Sun 7/1218:20IAD - SOU

2 stops16h 15mMultiple Airlines

Deal found 16/10£759

Sun 19/1009:10SOU - IAD

1 stop11h 40mBritish Airways

Sat 1/1118:05IAD - SOU

1 stop10h 40mBritish Airways

Deal found 16/10£1,507

Fri 24/1009:40SOU - IAD

1 stop11h 10mBritish Airways

Fri 31/1018:05IAD - SOU

1 stop10h 40mBritish Airways

Deal found 16/10£2,128

Tue 21/1009:10SOU - IAD

1 stop15h 20mBritish Airways

Thu 23/1017:50IAD - SOU

2 stops13h 15mBritish Airways

Deal found 17/10£2,610

Best flights from Portsmouth to Dulles Intl
Discover carefully curated flight deals from Portsmouth to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 17 October 2025.

Thu 5/318:05SOU - IAD

1 stop27h 00mVirgin Atlantic

Mon 9/312:30IAD - SOU

2 stops24h 30mVirgin Atlantic

Deal found 14/10£586

Sun 30/1118:05SOU - IAD

1 stop27h 00mKLM

Sun 7/1212:19IAD - SOU

2 stops14h 51mKLM

Deal found 16/10£668

Wed 1/409:20SOU - IAD

1 stop11h 15mDelta

Sun 5/417:50IAD - SOU

1 stop10h 00mDelta

Deal found 16/10£716

Sun 30/1109:30SOU - IAD

2 stops35h 05mMultiple Airlines

Sun 7/1222:30IAD - SOU

3 stops28h 55mMultiple Airlines

Deal found 16/10£939

Sun 30/1118:05SOU - IAD

1 stop27h 00mVirgin Atlantic

Sun 7/1218:05IAD - SOU

1 stop18h 20mVirgin Atlantic

Deal found 16/10£651

Wed 1/409:20SOU - IAD

1 stop11h 15mVirgin Atlantic

Sun 5/406:00IAD - SOU

2 stops30h 00mVirgin Atlantic

Deal found 16/10£716

Last-minute flights from Portsmouth to Dulles Intl
Discover last-minute flight deals from Portsmouth to Dulles Intl. Data last updated 17 October 2025 and is based on user searches.

Sun 19/1009:10SOU - IAD

1 stop11h 40mBritish Airways

Sat 1/1118:05IAD - SOU

1 stop10h 40mBritish Airways

Deal found 16/10£1,507

Tue 21/1009:10SOU - IAD

1 stop15h 20mBritish Airways

Thu 23/1017:50IAD - SOU

2 stops13h 15mBritish Airways

Deal found 17/10£2,610

Fri 24/1009:40SOU - IAD

1 stop11h 10mBritish Airways

Fri 31/1018:05IAD - SOU

1 stop10h 40mBritish Airways

Deal found 16/10£2,128

Sun 30/1118:05SOU - IAD

1 stop27h 00mVirgin Atlantic

Sun 7/1218:05IAD - SOU

1 stop18h 20mVirgin Atlantic

Deal found 16/10£651

Sun 30/1118:05SOU - IAD

1 stop27h 00mKLM

Sun 7/1218:05IAD - SOU

1 stop18h 20mKLM

Deal found 16/10£664

Sun 30/1119:40SOU - IAD

2 stops24h 55mMultiple Airlines

Sun 7/1218:20IAD - SOU

2 stops16h 15mMultiple Airlines

Deal found 16/10£759

One-way flights from Portsmouth to Dulles Intl
Search for one-way flight options from Portsmouth to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 17 October 2025.

Sun 30/1120:10SOU - IAD

1 stop24h 25mAer Lingus

Deal found 16/10£614

Sun 30/1119:40SOU - IAD

2 stops28h 50mMultiple Airlines

Deal found 16/10£632

Fri 24/1009:40SOU - IAD

1 stop11h 10mBritish Airways

Deal found 15/10£1,394

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 5/3

18:05-16:05

1 stop27h 00m

Washington, D.C. Dulles Intl

Mon 9/3

12:30-17:00

2 stops24h 30m

£586

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 30/11

18:05-16:05

1 stop27h 00m

Washington, D.C. Dulles Intl

Sun 7/12

18:05-17:25

1 stop18h 20m

£651

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 30/11

18:05-16:05

1 stop27h 00m

Washington, D.C. Dulles Intl

Sun 7/12

12:19-08:10

2 stops14h 51m

£668

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 1/4

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Sun 5/4

17:50-08:50

1 stop10h 00m

£716

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 1/4

09:20-15:35

1 stop11h 15m

Washington, D.C. Dulles Intl

Sun 5/4

06:00-17:00

2 stops30h 00m

£716

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 30/11

09:30-15:35

2 stops35h 05m

Washington, D.C. Dulles Intl

Sun 7/12

22:30-08:25

3 stops28h 55m

£939

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 30/11

20:10-15:35

1 stop24h 25m

£614

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Sun 30/11

19:40-19:30

2 stops28h 50m

£632

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 24/10

09:40-15:50

1 stop11h 10m

£1,394

Flights are sorted by cheapest return flights first.

Deals found on 16/10

Best time to book a flight from Portsmouth to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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. Dulles Intl Airport

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

Currently, February is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. Dulles Intl Airport (average of £337). Flying from Portsmouth to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £535). 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 IAD?

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

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

Travellers seeking maximum savings on their Portsmouth to Washington, D.C. Dulles Intl Airport flight should consider departing on Monday mornings 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. Dulles Intl Airport

The most flights from P0R to IAD are scheduled on a Wednesday (28 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).

Related info for your journey

How long is the flight from Portsmouth to Washington, D.C. Dulles Intl Airport?
Virgin Atlantic can get you from Portsmouth to Washington, D.C. Dulles Intl Airport in just under 27h. Your travel time can differ by up to . Airlines will cover a distance of 3639 mi.
What are the most reliable airlines from Portsmouth to Washington, D.C. Dulles Intl Airport?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portsmouth to Washington, D.C. Dulles Intl Airport on time: KLM (89%), Air France (89%), Delta (89%).
What are the cheapest flights from Portsmouth to Washington, D.C. Dulles Intl Airport?
The cheapest flight price from Portsmouth to Washington, D.C. Dulles Intl Airport is £388. On average you can expect to pay £1,459. The most popular route, (Southampton Eastleigh - Washington, D.C. Dulles Intl), can usually be booked for £589.
Can I find deals for flights from Portsmouth to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Portsmouth to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portsmouth to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Dulles Intl.
Can I find deals for business class flights from Portsmouth to Dulles Intl?
Yes. Cheapflights offers flight deals from Portsmouth to Dulles Intl 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. Dulles Intl Airport?
Currently, February is the cheapest month in which you can book a flight from Portsmouth to Washington, D.C. Dulles Intl Airport (average of £337). Flying from Portsmouth to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £535). 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

Hanover

Oxon Hill

Woodbridge

Arlington

Alexandria

College Park

Tysons

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Top 10 airlines flying from Portsmouth to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest£188	Average£534	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
TAP AIR PORTUGAL	Cheapest£353	Average£501	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Icelandair	Cheapest£372	Average£511	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Aer Lingus	Cheapest£389	Average£572	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
United Airlines	Cheapest£405	Average£593	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£428	Average£609	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Scandinavian Airlines	Cheapest£435	Average£580	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Virgin Atlantic	Cheapest£435	Average£603	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£437	Average£606	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air France	Cheapest£439	Average£594	FlexibilityNo cancel fee	On-time77%	Search Air France flights

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How does Cheapflights help users find flights from Portsmouth to Dulles Intl?

When you search for this flight from Portsmouth to Dulles Intl, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Dulles Intl?

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Can Cheapflights find flights from Portsmouth to Dulles Intl with no change fees?

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Cheap flights from Portsmouth to Washington, D.C. Dulles Intl Airport from £586

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/3. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Dulles Intl

Keep the following information in mind while searching for Portsmouth to Dulles Intl flight deals. Data was last updated 17 October 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Portsmouth to Dulles Intl

Cheapest flights from Portsmouth to Dulles IntlExplore the most affordable flight options available from Portsmouth to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.

Explore the most affordable flight options available from Portsmouth to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Portsmouth to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Portsmouth with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portsmouth to Washington, D.C. Dulles Intl Airport

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

What is the cheapest time of day to fly from P0R to IAD?

Find hourly flight availability from Portsmouth to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 October 2025.

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

Use this chart to determine the cheapest time to fly return from Portsmouth to Dulles Intl. Price data was last updated on 16 December 2024.

Weekly flight availability from Portsmouth to Washington, D.C. Dulles Intl Airport

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Dulles Intl. 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. Dulles Intl Airport?

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

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

Can I find deals for flights from Portsmouth to Dulles Intl that include hotel bookings?

How can I find direct flights from Portsmouth to Dulles Intl?

Can I find deals for business class flights from Portsmouth to Dulles Intl?

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

Travelling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Portsmouth to Dulles Intl

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Top 10 airlines flying from Portsmouth to Dulles Intl

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How does Cheapflights help users find flights from Portsmouth to Dulles Intl?

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Dulles Intl?

Can Cheapflights find flights from Portsmouth to Dulles Intl with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to Dulles Intl become cheaper?

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Cheapest flights from Portsmouth to Dulles Intl
Explore the most affordable flight options available from Portsmouth to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.