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$490+ Cheap flights from Washington, D.C. (WAS) 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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — LHR
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Portsmouth

Keep the following information in mind while searching for Washington, D.C. to Portsmouth flight deals. Data was last updated May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$802
(KLM)

One-way from

$490
(Ovago)

Popular in

June

Cheapest in

March

Average price

$1,025
Provider with most accurate pricing for Washington, D.C. (WAS)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-London (LON) flights.
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From Washington, D.C. (WAS) to Portsmouth
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One-way flight from Washington, D.C. (WAS) to Portsmouth
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Highest demand for flights based on searches. 18% potential increase in price ($208 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Washington, D.C. to Portsmouth

Cheapest flights from Washington, D.C. to Portsmouth
Explore the most affordable flight options available from Washington, D.C. to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This KLM deal was found by Cheapflights users on 4/30. 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 8/135:25 pmIAD - SOU
1 stop19h 25mKLM
Mon 8/186:25 pmSOU - IAD
1 stop26h 10mKLM
Deal found 4/30$802
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2212:00 pmIAD - SOU
2 stops15h 45mDelta
Sat 9/69:20 amSOU - IAD
1 stop11h 15mDelta
Deal found 4/30$906
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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 8/1310:40 pmIAD - SOU
2 stops15h 50mAer Lingus
Mon 8/189:40 amSOU - IAD
1 stop11h 10mAer Lingus
Deal found 4/30$913
This KLM deal was found by Cheapflights users on 4/30. 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 8/133:30 pmDCA - SOU
2 stops12h 15mKLM
Mon 8/189:20 amSOU - DCA
2 stops17h 01mKLM
Deal found 4/30$919
This Trip.com deal was found by Cheapflights users on 4/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/298:30 pmIAD - SOU
2 stops18h 00mMultiple Airlines
Mon 8/48:00 pmSOU - IAD
2 stops31h 10mMultiple Airlines
Deal found 4/30$998
This Air France deal was found by Cheapflights users on 4/30. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/131:00 pmBWI - SOU
2 stops14h 45mKLM
Mon 8/189:20 amSOU - BWI
2 stops17h 23mKLM
Deal found 4/30$1,119
This Mytrip deal was found by Cheapflights users on 4/30. 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.
Sun 6/156:59 amDCA - SOU
3 stops31h 31mMultiple Airlines
Sun 6/228:45 amSOU - DCA
2 stops29h 07mMultiple Airlines
Deal found 4/30$1,167
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/299:20 pmBWI - SOU
2 stops13h 55mMultiple Airlines
Mon 8/48:55 amSOU - BWI
2 stops15h 40mMultiple Airlines
Deal found 4/30$1,374
This KAYAK deal was found by Cheapflights users on 4/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/88:45 pmIAD - SOU
1 stop13h 50mBritish Airways
Sat 11/158:55 amSOU - IAD
2 stops35h 40mBritish Airways
Deal found 4/30$1,393
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/159:25 amBWI - SOU
2 stops18h 20mDelta
Sun 6/229:20 amSOU - BWI
2 stops17h 53mDelta
Deal found 4/30$1,525
This KAYAK deal was found by Cheapflights users on 4/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/229:20 pmBWI - SOU
2 stops13h 40mBritish Airways
Mon 7/78:30 amSOU - BWI
2 stops16h 05mBritish Airways
Deal found 4/29$3,413

Cheapflights Fare Finder

Customize your flight search to find flights from Washington, D.C. 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 May 1, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Portsmouth that are best for you.

Fly from

Washington, D.C.

Fly to

Portsmouth

Route

Depart

Return

Price

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 8/13

5:25 pm-5:50 pm

1 stop19h 25m

Southampton Eastleigh

Mon 8/18

6:25 pm-3:35 pm

1 stop26h 10m

$802

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Fri 8/22

12:00 pm-8:45 am

2 stops15h 45m

Southampton Eastleigh

Sat 9/6

9:20 am-3:35 pm

1 stop11h 15m

$906

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 8/13

10:40 pm-7:30 pm

2 stops15h 50m

Southampton Eastleigh

Mon 8/18

9:40 am-3:50 pm

1 stop11h 10m

$913

Washington, D.C.Southampton

DCA - SOU

DCASOU

Washington, D.C. Reagan-National

Wed 8/13

3:30 pm-8:45 am

2 stops12h 15m

Southampton Eastleigh

Mon 8/18

9:20 am-9:21 pm

2 stops17h 01m

$919

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Tue 7/29

8:30 pm-7:30 pm

2 stops18h 00m

Southampton Eastleigh

Mon 8/4

8:00 pm-10:10 pm

2 stops31h 10m

$998

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Wed 8/13

1:00 pm-8:45 am

2 stops14h 45m

Southampton Eastleigh

Mon 8/18

9:20 am-9:43 pm

2 stops17h 23m

$1,119

Washington, D.C.Southampton

DCA - SOU

DCASOU

Washington, D.C. Reagan-National

Sun 6/15

6:59 am-7:30 pm

3 stops31h 31m

Southampton Eastleigh

Sun 6/22

8:45 am-8:52 am

2 stops29h 07m

$1,167

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Tue 7/29

9:20 pm-4:15 pm

2 stops13h 55m

Southampton Eastleigh

Mon 8/4

8:55 am-7:35 pm

2 stops15h 40m

$1,374

BaltimoreSouthampton

BWI - SOU

BWISOU

Baltimore/Washington

Sun 6/15

9:25 am-8:45 am

2 stops18h 20m

Southampton Eastleigh

Sun 6/22

9:20 am-10:13 pm

2 stops17h 53m

$1,525

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Sun 6/22

8:25 pm-7:30 pm

1 stop18h 05m

Southampton Eastleigh

Mon 7/7

4:45 pm-3:55 pm

2 stops28h 10m

$1,940

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 15 results
1
2

Best time to book a flight from Washington, D.C. to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Washington, D.C. 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.

Cheapflights Insights

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

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Portsmouth (average of $661). Flying from Washington, D.C. to Portsmouth in June is currently the most expensive (average of $1,103). 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 WAS to P0R?

Find hourly flight availability from Washington, D.C. 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 May 1, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to Portsmouth as you normally would.

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

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

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

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

Explore weekly flight availability from Washington, D.C. 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 May 1, 2025.

The most flights from WAS to P0R are scheduled on a Monday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (23 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 May 1, 2025.
See what other customers who have flown with Delta, KLM and Aer Lingus from Washington, D.C. to Portsmouth have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,076 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
6,842 reviews
Delta
8.0
Very good
7,934 reviews

Entertainment

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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 popular routes from Washington, D.C. to Portsmouth?

    The most popular flight routes from Washington, D.C. to Portsmouth are Washington, D.C. Dulles Intl - Southampton Eastleigh, Baltimore/Washington - Southampton Eastleigh and Washington, D.C. Reagan-National - Southampton Eastleigh.

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

    No one likes to see their flight delayed. When booking a flight from Washington, D.C. to Portsmouth consider choosing Singapore Airlines (91%), Delta (89%) or Virgin Atlantic (87%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from Washington, D.C. to Portsmouth is generally $2,419, our data shows the cheapest flight currently is $395. When looking at the most popular route, (Washington, D.C. Dulles Intl - Southampton Eastleigh), you can expect to pay $767 for that flight.

  • Can I find deals for flights from Washington, D.C. to Portsmouth that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Portsmouth?

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

  • Can I find deals for business class flights from Washington, D.C. to Portsmouth?

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

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to Portsmouth (average of $661). Flying from Washington, D.C. to Portsmouth in June is currently the most expensive (average of $1,103). 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 Washington, D.C. to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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Dulles Intl to Southend flights

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

Discover the top 10 airlines that operate flights from Washington, D.C. 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$369Average$514FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$370Average$597FlexibilityNo cancel feeOn-time77%
DeltaCheapest$421Average$902FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$474Average$629FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$486Average$759FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$535Average$810FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$549Average$750FlexibilityNo cancel feeOn-time67%
IberiaCheapest$562Average$716FlexibilityNo cancel feeOn-time77%
SWISSCheapest$572Average$801FlexibilityNo cancel feeOn-time79%
FinnairCheapest$573Average$758FlexibilityNo cancel feeOn-time76%

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