HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$612+ Cheap flights from Dulles Intl (IAD) to Portsmouth, England

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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Portsmouth with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Dulles Intl to Portsmouth

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Portsmouth (P0R). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2024.

Round-trip from

$720
(Ticket)

One-way from

$612
(KAYAK)

Popular in

July

Cheapest in

November
From Washington, D.C. Dulles Intl to Portsmouth
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Portsmouth
Search Deals
High demand for flights, 22% potential price rise
Search Deals
Best time to find cheap flights, 6% potential price drop
Search Deals

Find flight deals from Dulles Intl to Portsmouth

Cheapest flights from Dulles Intl to Portsmouth
Explore the most affordable flight options available from Dulles Intl to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2024.

This British Airways deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:10 pmIAD - SOU
1 stop10h 35mBritish Airways
Tue 8/58:40 amSOU - IAD
2 stops13h 55mBritish Airways
Deal found 12/17$1,445

Find flights from Dulles Intl to Portsmouth within your budget

Customize your flight search to find flights from Dulles Intl to Portsmouth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 1/27

5:35 pm-4:50 pm

1 stop18h 15m

Southampton Eastleigh

Sun 2/9

9:30 am-3:45 pm

1 stop11h 15m

$720

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 1/27

12:52 pm-8:25 am

2 stops14h 33m

Southampton Eastleigh

Sun 2/9

9:30 am-6:56 pm

2 stops14h 26m

$766

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 1/27

7:40 pm-4:50 pm

3 stops16h 10m

Southampton Eastleigh

Sun 2/9

5:20 pm-6:25 pm

3 stops30h 05m

$860

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 1/22

5:10 pm-3:35 pm

1 stop17h 25m

Southampton Eastleigh

Sun 2/2

9:30 am-3:40 pm

1 stop11h 10m

$962

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Mon 1/13

6:00 pm-3:30 pm

2 stops16h 30m

$612

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Best time to book a flight from Dulles Intl to Portsmouth

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

Travel insights for flights from Dulles Intl to Portsmouth

Get recent, data-driven insights about flights from Dulles Intl to Portsmouth including ideal travel times, pricing trends, and more.

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portsmouth (average of $661). Flying from Washington, D.C. Dulles Intl Airport to Portsmouth in June is currently the most expensive (average of $1,135). 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 IAD to P0R?

Find hourly flight availability from Dulles Intl to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2024.

When flying from Washington, D.C. Dulles Intl Airport to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

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

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Portsmouth flight should consider departing on Sunday afternoons when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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

Explore weekly flight availability from Dulles Intl to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 18, 2024.

The most flights from IAD to P0R are scheduled on a Tuesday (27 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (17 on average).

Rainfall in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

Temperature in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portsmouth, 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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portsmouth. Reviews last updated December 18, 2024.
KLM
7.8
Good
1,349 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Overall

7.8

Boarding

7.9

Comfort

7.7

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

KLM
7.8
Good
1,349 reviews
KLM
7.8
Good
1,349 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Overall

7.8

Boarding

7.9

Comfort

7.7

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

Virgin Atlantic
7.5
Good
668 reviews
KLM
7.8
Good
1,349 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Overall

7.8

Boarding

7.9

Comfort

7.7

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

British Airways
6.6
Okay
6,820 reviews
KLM
7.8
Good
1,349 reviews

Food

7.3

Entertainment

7.2

Crew

8.4

Overall

7.8

Boarding

7.9

Comfort

7.7

Reviews

1 / 10

Flight was late do to issues with loading stuff. One of the two bathrooms in business class was not working. WiFi did not work 80% of the time. My bag came out last even though it had a priority tag

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Portsmouth. 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 reliable airlines from Washington, D.C. Dulles Intl Airport to Portsmouth?

    Consider Virgin Atlantic (86%), Singapore Airlines (86%) or Air France (84%) when booking your flight. These represent the most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Portsmouth.

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

    While on average a flight from Washington, D.C. Dulles Intl Airport to Portsmouth is generally $1,621, our data shows the cheapest flight currently is $393. When looking at the most popular route, (Washington, D.C. Dulles Intl - Southampton Eastleigh), you can expect to pay $720 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Portsmouth 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 Washington, D.C. Dulles Intl Airport to Portsmouth?

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Portsmouth (average of $661). Flying from Washington, D.C. Dulles Intl Airport to Portsmouth in June is currently the most expensive (average of $1,135). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Dulles Intl to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Heathrow flights
Baltimore to Heathrow flights
Reagan-National to Heathrow flights
Dulles Intl to Gatwick flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
Baltimore to Stansted flights
Reagan-National to Gatwick flights
Dulles Intl to Edinburgh flights
Reagan-National to London City flights
Dulles Intl to Luton flights
Dulles Intl to Stansted flights
Baltimore to Luton flights
Baltimore to Edinburgh flights
Reagan-National to Edinburgh flights
Dulles Intl to Manchester flights
Baltimore to Manchester flights
Reagan-National to Manchester flights
Baltimore to London City flights
Dulles Intl to Birmingham flights
Baltimore to Birmingham flights
Dulles Intl to Liverpool flights
Reagan-National to Birmingham flights
Reagan-National to Stansted flights
Dulles Intl to Southampton flights
Baltimore to Liverpool flights
Dulles Intl to Newcastle upon Tyne flights
Dulles Intl to Bristol flights
Dulles Intl to Leeds flights
Baltimore to Bristol flights
Baltimore to Leeds flights
Reagan-National to Bristol flights
Baltimore to Southampton flights
Reagan-National to Liverpool flights
Baltimore to Newcastle upon Tyne flights
Reagan-National to Leeds flights
Reagan-National to Newcastle upon Tyne flights
Reagan-National to Luton flights
Baltimore to Newquay flights
Dulles Intl to Newquay flights
Reagan-National to Southampton flights
Dulles Intl to Southend flights
Reagan-National to Newquay flights
Baltimore to Southend flights
Baltimore to East Midlands flights
Reagan-National to East Midlands flights
Dulles Intl to East Midlands flights
Baltimore to Exeter flights

Top 10 airlines flying from Dulles Intl to Portsmouth

Discover the top 10 airlines that operate flights from Dulles Intl to Portsmouth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$366Average$482FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$370Average$603FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$398Average$646FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$459Average$702FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$480Average$681FlexibilityNo cancel feeOn-time76%
KLMCheapest$546Average$771FlexibilityNo cancel feeOn-time75%
FinnairCheapest$551Average$703FlexibilityNo cancel feeOn-time76%
SWISSCheapest$572Average$785FlexibilityNo cancel feeOn-time79%
IberiaCheapest$581Average$742FlexibilityNo cancel feeOn-time77%
DeltaCheapest$586Average$849FlexibilityNo cancel feeOn-timeN/A
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.