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Cheap flights from Portsmouth to Seattle from £495

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 18/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SEA
22 Jan — 29 Jan1
1 adult

Cheap flight deals from Portsmouth to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Portsmouth (P0R) to Seattle (SEA). 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 17 January 2025.

Round-trip from

£495
KLM
  • KLM
  • 18/2-25/2
  • 2 total stops
  • 45h 07m total
  • Portsmouth to Seattle
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Find flight deals from Portsmouth to Seattle

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

Tue 18/217:20SOU - SEA
1 stop26h 26mKLM
Tue 25/214:09SEA - SOU
1 stop18h 41mKLM
Deal found 16/1£495
Tue 18/209:00SOU - SEA
2 stops21h 25mDelta
Tue 25/207:10SEA - SOU
2 stops17h 15mDelta
Deal found 16/1£523
Tue 18/209:00SOU - SEA
3 stops35h 10mMultiple Airlines
Tue 25/215:10SEA - SOU
3 stops33h 35mMultiple Airlines
Deal found 16/1£884

Find flights from Portsmouth to Seattle within your budget

Customise your flight search to find flights from Portsmouth to Seattle 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 858,174 searches. Data last updated 17 January 2025.

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Any airport

Fly to

Any airport

Route

Depart

Return

Price

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 18/2

17:20-11:46

1 stop26h 26m

Seattle/Tacoma Intl

Tue 25/2

14:09-16:50

1 stop18h 41m

£495

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 18/2

09:00-22:25

2 stops21h 25m

Seattle/Tacoma Intl

Tue 25/2

07:10-08:25

2 stops17h 15m

£523

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 18/2

09:00-12:10

3 stops35h 10m

Seattle/Tacoma Intl

Tue 25/2

15:10-08:45

3 stops33h 35m

£884

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 19/4

11:35-17:50

3 stops38h 15m

£533

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Sat 19/4

09:40-16:59

1 stop15h 19m

£637

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Tue 8/7

16:30-11:35

2 stops27h 05m

£668

Flights are sorted by cheapest return flights first.

Deals found on 16/1

Best time to book a flight from Portsmouth to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle 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.

Travel insights for flights from Portsmouth to Seattle

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

What is the cheapest month to book a flight from Portsmouth to Seattle?

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Seattle (average of £622). Flying from Portsmouth to Seattle in July is currently the most expensive (average of £946). 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 SEA?

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

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

Weekly flight availability from Portsmouth to Seattle

Explore weekly flight availability from Portsmouth to Seattle. 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 17 January 2025.

The most flights from P0R to SEA are scheduled on a Friday (22 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle 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 Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated 17 January 2025.
Delta
8.0
Very Good
8,513 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Delta
8.0
Very Good
8,513 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

KLM
7.8
Good
1,339 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Aer Lingus
7.1
Good
1,077 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

British Airways
6.6
Okay
6,824 reviews
Delta
8.0
Very Good
8,513 reviews
Check prices

Boarding

8.2

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 10

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Portsmouth?

    For a flight from Portsmouth to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city. Seattle/Tacoma Intl is the only Seattle airport and it handles 0 inbound flights from Portsmouth per day. 12 airlines have flights to Seattle/Tacoma Intl from Portsmouth on a regular basis.

  • What are the most reliable airlines from Portsmouth to Seattle?

    Before booking your flight to Seattle from Portsmouth, check out the most reliable airlines to get you to your destination on time: KLM (75%), Air France (75%), Delta( 75%).

  • What are the cheapest flights from Portsmouth to Seattle?

    Looking for the cheapest flight from Portsmouth to Seattle? While on average our users pay £2,063, our data indicates the cheapest price to be £435. The most popular route (Southampton Eastleigh - Seattle/Tacoma Intl), is priced around £495.

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

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

  • How can I find direct flights from Portsmouth to Seattle?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Seattle 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 Seattle?

    Currently, January is the cheapest month in which you can book a flight from Portsmouth to Seattle (average of £622). Flying from Portsmouth to Seattle in July is currently the most expensive (average of £946). 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

Travelling to a place near Portsmouth?

Book flights to Portsmouth if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

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Alternative routes for Portsmouth to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Portsmouth to Seattle

Discover the top 10 airlines that operate flights from Portsmouth to Seattle. 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 858,174 searches. Data last updated 17 January 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£324Average£675FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IcelandairCheapest£357Average£569FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£438Average£691FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
LufthansaCheapest£438Average£581FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Aer LingusCheapest£453Average£712FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Air FranceCheapest£456Average£643FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapest£457Average£602FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£465Average£615FlexibilityNo cancel feeOn-time70%
Search British Airways flights
FinnairCheapest£471Average£638FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£476Average£602FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to Seattle?

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

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

Yes, we can. To see specific flights from Portsmouth to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Portsmouth today and book when prices fit your budget.

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