How long is the flight from Portsmouth to State of Washington?

Departing from Portsmouth to State of Washington will take you 21h 44m. The distance between Portsmouth and State of Washington is about 4787 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in State of Washington ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit State of Washington when rainfall is around 18.0 mm.

If weather is an important factor for your trip to State of Washington, 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 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

What are the cheapest flights from Portsmouth to State of Washington?

Looking for the cheapest flight from Portsmouth to State of Washington? While on average our users pay £1,828, our data indicates the cheapest price to be £313. The most popular route (Southampton Eastleigh - Seattle/Tacoma Intl), is priced around £543.

What are the most reliable airlines from Portsmouth to State of Washington?

Consider SAUDIA (79%), Scandinavian Airlines (78%) or KLM (75%) when booking your flight. These represent the most reliable airlines when flying from Portsmouth to State of Washington.

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

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

How can I find direct flights from Portsmouth to Washington?

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

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

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

£506+ Cheap Flights from Portsmouth to Washington

Cheap flight deals from Portsmouth to Washington

Enter your travel dates to find the best prices.

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Best

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Cheapest flights from Portsmouth to Washington
Explore the most affordable flight options available from Portsmouth to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Thu 1/1017:20 -

1 stop26h 32m

Wed 7/1013:45 -

1 stop19h 05m

Deal found 2/9£540

Wed 16/908:55 -

1 stop16h 15m

Sun 20/919:10 -

1 stop16h 20m

Deal found 2/9£543

Tue 15/920:00 -

1 stop29h 10m

Sun 20/919:10 -

1 stop16h 20m

Deal found 2/9£553

Mon 19/1009:05 -

2 stops21h 44m

Mon 26/1009:42 -

2 stops24h 23m

Deal found 4/9£557

Wed 14/1009:20 -

1 stop15h 50m

Sun 18/1020:20 -

2 stops28h 05m

Deal found 4/9£566

Find flight deals from Portsmouth to Washington

Round-trip from	£540
One-way from	£506
Popular in	August
Cheapest in	February
Average price	£542

KLM
1/10-7/10
2 total stops
45h 37m total
Portsmouth to Washington

Search Deals

British Airways
27/12-31/12
2 total stops
28h 00m total
Portsmouth to Washington

Search Deals

Highest demand for flights based on searches. 6% potential increase in price (£26 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sun 27/12

20:50-16:50

2 stops28h 00m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£506

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sun 15/11

20:50-16:50

2 stops28h 00m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£508

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sat 26/12

19:55-16:50

2 stops28h 55m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£509

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Mon 19/10

09:05-22:49

2 stops21h 44m

Seattle/Tacoma Intl

Mon 26/10

09:42-17:05

2 stops24h 23m

£557

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Sun 22/11

17:30-11:47

1 stop26h 17m

Seattle/Tacoma Intl

Tue 5/1

21:55-17:00

2 stops35h 05m

£583

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Fri 20/11

08:40-11:47

1 stop35h 07m

Seattle/Tacoma Intl

Tue 5/1

21:55-17:00

2 stops35h 05m

£583

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Wed 14/10

08:55-11:35

2 stops34h 40m

Seattle/Tacoma Intl

Sun 18/10

19:10-19:30

1 stop16h 20m

£584

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Tue 15/9

17:20-16:50

2 stops31h 30m

Seattle/Tacoma Intl

Sun 20/9

07:15-08:35

2 stops17h 20m

£589

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Thu 4/2

17:30-11:47

1 stop26h 17m

Seattle/Tacoma Intl

Tue 9/2

14:20-17:00

1 stop18h 40m

£591

SouthamptonSeattle

SOU Southampton Eastleigh - SEA Seattle/Tacoma Intl

SOUSEA

Southampton Eastleigh

Fri 5/2

17:30-11:47

1 stop26h 17m

Seattle/Tacoma Intl

Thu 11/2

07:15-17:00

2 stops25h 45m

£591

Flights are sorted by cheapest return flights first.

Deals found on 5/9

Showing 1-10 of 18 resultsSorted by cheapest first

Best time to book a flight from Portsmouth to Washington

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

SOU-SEA

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

P0R-USWA

SOU-SEA

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

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

Weekly flight availability from Portsmouth to State of Washington

The most flights from P0R to USWA are scheduled on a Tuesday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (18 on average).

Related info for your journey

How long is the flight from Portsmouth to State of Washington?
Departing from Portsmouth to State of Washington will take you 21h 44m. The distance between Portsmouth and State of Washington is about 4787 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the most reliable airlines from Portsmouth to State of Washington?
Consider SAUDIA (79%), Scandinavian Airlines (78%) or KLM (75%) when booking your flight. These represent the most reliable airlines when flying from Portsmouth to State of Washington.
What are the cheapest flights from Portsmouth to State of Washington?
Looking for the cheapest flight from Portsmouth to State of Washington? While on average our users pay £1,828, our data indicates the cheapest price to be £313. The most popular route (Southampton Eastleigh - Seattle/Tacoma Intl), is priced around £543.
Can I find deals for flights from Portsmouth to Washington that include hotel bookings?
Yes. In addition to deals on Portsmouth to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portsmouth to Washington?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Washington.
Can I find deals for business class flights from Portsmouth to Washington?
Yes. Cheapflights offers flight deals from Portsmouth to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Portsmouth to Washington

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Top 10 airlines flying from Portsmouth to Washington

Airline	Cheapest	Average	Flexibility	On-time
Lufthansa	Cheapest£332	Average£420	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Icelandair	Cheapest£333	Average£512	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
United Airlines	Cheapest£367	Average£485	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Aer Lingus	Cheapest£388	Average£632	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Virgin Atlantic	Cheapest£416	Average£797	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
KLM	Cheapest£430	Average£609	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Air France	Cheapest£435	Average£616	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Delta	Cheapest£438	Average£653	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
British Airways	Cheapest£448	Average£627	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Alaska Airlines	Cheapest£467	Average£564	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portsmouth to Washington.

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

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

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Cheap flights from Portsmouth to Washington from £506

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/12. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Washington

Cheapest flights from Portsmouth to WashingtonExplore the most affordable flight options available from Portsmouth to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Explore the most affordable flight options available from Portsmouth to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Best flights from Portsmouth to WashingtonDiscover carefully curated flight deals from Portsmouth to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 September 2026.

Discover carefully curated flight deals from Portsmouth to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 September 2026.

Last-minute flights from Portsmouth to WashingtonDiscover last-minute flight deals from Portsmouth to Washington. Data last updated 5 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Washington. Data last updated 5 September 2026 and is based on user searches.

One-way flights from Portsmouth to WashingtonSearch for one-way flight options from Portsmouth to Washington. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.

Search for one-way flight options from Portsmouth to Washington. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.

Find flight deals from Portsmouth to Washington

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Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Washington that are best for you.

Best time to book a flight from Portsmouth to Washington

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

Cheapflights Insights

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

Find hourly flight availability from Portsmouth to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 5 September 2026.

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

Weekly flight availability from Portsmouth to State of Washington

The most flights from P0R to USWA are scheduled on a Tuesday (24 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (18 on average).

Related info for your journey

How long is the flight from Portsmouth to State of Washington?

What are the most reliable airlines from Portsmouth to State of Washington?

What are the cheapest flights from Portsmouth to State of Washington?

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

How can I find direct flights from Portsmouth to Washington?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to Washington

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Complete your trip

Complete your trip to Washington by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to United States

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Portsmouth and Washington flights

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Portsmouth to Washington flights

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Top 10 airlines flying from Portsmouth to Washington

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

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Cheapest flights from Portsmouth to Washington
Explore the most affordable flight options available from Portsmouth to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.

Best flights from Portsmouth to Washington
Discover carefully curated flight deals from Portsmouth to Washington that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 September 2026.

Last-minute flights from Portsmouth to Washington
Discover last-minute flight deals from Portsmouth to Washington. Data last updated 5 September 2026 and is based on user searches.

One-way flights from Portsmouth to Washington
Search for one-way flight options from Portsmouth to Washington. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.