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Portsmouth

$689+ 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 7/2. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — LHR
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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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 January 21, 2025.

Round-trip from

$727
(Mytrip)

One-way from

$689
(Gurufare)

Popular in

July

Cheapest in

November

Average price

$1,025
From Washington, D.C. Dulles Intl to Portsmouth
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One-way flight from Washington, D.C. Dulles Intl to Portsmouth
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Highest demand for flights based on searches. 16% potential increase in price ($173 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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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 January 21, 2025.

This Mytrip deal was found by Cheapflights users on 1/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/55:10 pmIAD - SOU
2 stops21h 30mMultiple Airlines
Wed 3/129:30 amSOU - IAD
2 stops35h 10mMultiple Airlines
Deal found 1/21$727
This KLM deal was found by Cheapflights users on 1/21. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/55:35 pmIAD - SOU
1 stop18h 15mKLM
Wed 3/125:20 pmSOU - IAD
1 stop27h 25mKLM
Deal found 1/21$749
This Virgin Atlantic deal was found by Cheapflights users on 1/21. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/36:40 pmIAD - SOU
2 stops17h 20mVirgin Atlantic
Fri 9/129:20 amSOU - IAD
1 stop11h 15mVirgin Atlantic
Deal found 1/21$844
This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/266:00 pmIAD - SOU
2 stops20h 40mAer Lingus
Sun 3/98:10 pmSOU - IAD
2 stops28h 35mAer Lingus
Deal found 1/21$966
This British Airways deal was found by Cheapflights users on 1/21. 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.
Wed 4/210:40 pmIAD - SOU
2 stops15h 45mBritish Airways
Tue 4/89:10 amSOU - IAD
1 stop11h 40mBritish Airways
Deal found 1/21$2,101

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 3/5

5:10 pm-7:40 pm

2 stops21h 30m

Southampton Eastleigh

Wed 3/12

9:30 am-4:40 pm

2 stops35h 10m

$727

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 3/5

5:35 pm-4:50 pm

1 stop18h 15m

Southampton Eastleigh

Wed 3/12

5:20 pm-4:45 pm

1 stop27h 25m

$749

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 2/26

6:00 pm-7:40 pm

2 stops20h 40m

Southampton Eastleigh

Sun 3/9

8:10 pm-8:45 pm

2 stops28h 35m

$966

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 4/2

10:40 pm-7:25 pm

2 stops15h 45m

Southampton Eastleigh

Tue 4/8

9:10 am-3:50 pm

1 stop11h 40m

$2,101

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 7/2

9:00 pm-7:30 pm

1 stop17h 30m

$689

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

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 $1,137). 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 January 21, 2025.

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 January 21, 2025.

The most flights from IAD to P0R are scheduled on a Tuesday (26 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (13 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 January 21, 2025.
KLM
7.8
Good
1,341 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,341 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Aer Lingus
7.1
Good
1,082 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

British Airways
6.6
Okay
6,834 reviews
KLM
7.8
Good
1,341 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Food

7.3

Crew

8.4

Entertainment

7.2

Reviews

1 / 10

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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 KLM (88%), Delta (88%) or Virgin Atlantic (88%) 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 $1,533, our data shows the cheapest flight currently is $394. When looking at the most popular route, (Washington, D.C. Dulles Intl - Southampton Eastleigh), you can expect to pay $634 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 $1,137). 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.

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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
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Baltimore to Birmingham flights
Dulles Intl to Newcastle upon Tyne flights
Reagan-National to Newcastle upon Tyne flights
Baltimore to Newcastle upon Tyne flights
Reagan-National to Stansted flights
Dulles Intl to Leeds flights
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Baltimore to Liverpool flights
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Reagan-National to Leeds flights
Reagan-National to Luton flights
Baltimore to Bristol flights
Baltimore to Leeds flights
Reagan-National to Bristol flights
Reagan-National to Liverpool flights
Reagan-National to Southampton flights
Baltimore to Newquay flights
Dulles Intl to Newquay flights
Baltimore to Exeter flights
Dulles Intl to Southend flights
Reagan-National to Newquay flights
Dulles Intl to Bournemouth flights
Dulles Intl to Exeter flights
Dulles Intl to Doncaster flights
Baltimore to East Midlands flights
Baltimore to Southend 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$369Average$600FlexibilityNo cancel feeOn-time77%
PLAYCheapest$369Average$484FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$398Average$646FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$459Average$721FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$480Average$672FlexibilityNo cancel feeOn-time76%
KLMCheapest$546Average$771FlexibilityNo cancel feeOn-time75%
FinnairCheapest$551Average$718FlexibilityNo cancel feeOn-time76%
SWISSCheapest$572Average$789FlexibilityNo cancel feeOn-time79%
IberiaCheapest$583Average$739FlexibilityNo cancel feeOn-time77%
DeltaCheapest$586Average$858FlexibilityNo cancel feeOn-timeN/A
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