Cheap flights from Portsmouth to Seattle

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How to find the cheapest flight from
Portsmouth to Seattle (SEA)

All the information you need to plan the best null to SEA flight in 2022: compare Portsmouth to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
What is the cheapest month to fly from Portsmouth to Seattle?

February can be a great time to fly to Seattle from Portsmouth with a flight ticket averaging about £435. Cheapflights users have found deals in the month of February for as cheap as £286. The most expensive prices can be found in the month of July.

How far in advance should I book a flight from Portsmouth to Seattle?

Travelers have found it’s best to book a flight 52 days in advance to save up to 51% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 52 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Portsmouth to Seattle 1-2 weeks in advance for as low as £493, or £645 for flights within the next 24 hours.

When is the cheapest time to fly from Portsmouth to Seattle (P0R - SEA)?

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.

Portsmouth to Seattle 2022 flight deals

Cheap flights to Seattle from Portsmouth found for this year
2 Jul - 15 Jul
£860pp
SOU
Southampton Eastleigh
KLM
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
KLM
 
1 STOP
SOU
Southampton Eastleigh
2 Jul - 15 Jul
£910pp
SOU
Southampton Eastleigh
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
SOU
Southampton Eastleigh
2 Jul - 15 Jul
£1,290pp
SOU
Southampton Eastleigh
Air France
   
2 STOPS
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Air France
   
2 STOPS
SOU
Southampton Eastleigh

One-way flights to Seattle/Tacoma Intl from Portsmouth

The cheapest one-way flights from Portsmouth to Seattle
13:20 - 11:55
KLM
1 stop
30h 35m
SOU - SEA
KLM
13:20 - 13:58
Air France
2 stops
32h 38m
SOU - SEA
Air France
15:50 - 13:55
Multiple Airlines
2 stops
30h 05m
SOU - SEA
Multiple Airlines
£1,206
Combigo

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Portsmouth</span> to <span class="emphasized">Seattle</span> flights.

Flight FAQs

From Portsmouth to Seattle

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. 16 airlines have flights to Seattle/Tacoma Intl from Portsmouth on a regular basis.

Can I find flights from Portsmouth to Seattle for under £900 on Cheapflights?

Yes, there are multiple flights from Portsmouth to Seattle for under £900. The cheapest flight booked recently is on KLM for just £860, but on average you can expect to pay £3,490.

What are the most popular airlines that fly from Portsmouth to Seattle?

When booking a flight from Portsmouth to Seattle, you may want to consider flying on American Airlines, Air Canada or Air France as they are the most popular for this route.

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: Alaska Airlines (91%), American Airlines (75%), Finnair( 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 £1,988, our data indicates the cheapest price to be £435. The most popular route (Southampton Eastleigh - Seattle/Tacoma Intl), is priced around £860.

COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

Do I need a COVID test to fly to Seattle from Portsmouth?

Information is based on travel restrictions from Portsmouth to Seattle/Tacoma Intl

Most visitors from Portsmouth need to provide a negative COVID-19 test result and/or quarantine to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from Portsmouth must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 1 day for RT-PCR (NAAT) and 1 day for Antigen (quick-test) before departing to Seattle/Tacoma Intl.

Quarantine requirements
Visitors from Portsmouth are not required to quarantine after entering Seattle/Tacoma Intl.

Do I need a test to fly back to Portsmouth from Seattle?

Returning to Portsmouth from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl are not required to present a negative COVID-19 PCR test or antigen result upon entering Portsmouth.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering Portsmouth.

Hide COVID Travel Restrictions for Seattle, WA

Alternative routes for Portsmouth to Seattle

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from Portsmouth to Seattle.
Today's exchange rate
£1 = $1.26
Average temperature for May in Seattle
19.0 °C
Avg rainfall for May in Seattle
45.0 mm

Airports servicing Portsmouth

Airports servicing Seattle

Top 10 airlines flying from Portsmouth to Seattle/Tacoma Intl

The chart below displays the airlines Cheapflights users travelling from Portsmouth to Seattle choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Norwegian Air UK
£308 £563 No cancel fee N/A
Search Norwegian Air UK flights
Delta
£316 £659 No cancel fee N/A
Search Delta flights
Norwegian
£339 £463 No cancel fee 74%
Search Norwegian flights
United Airlines
£342 £506 No cancel fee 69%
Search United Airlines flights
Icelandair
£360 £494 No cancel fee 76%
Search Icelandair flights
American Airlines
£367 £639 No cancel fee 71%
Search American Airlines flights
Virgin Atlantic
£397 £596 No cancel fee 72%
Search Virgin Atlantic flights
Lufthansa
£405 £538 No cancel fee 76%
Search Lufthansa flights
KLM
£409 £603 No cancel fee 75%
Search KLM flights
Air Canada
£415 £534 No cancel fee 67%
Search Air Canada flights

Hourly flight availability from Portsmouth to Seattle

See what time of day planes typically take off from Portsmouth towards Seattle.
Afternoon Midday to 6 PM 63% of flight departures
Morning 6 AM to midday 36% of flight departures
Early morning Midnight to 6 AM 1% of flight departures
Evening 6 PM to midnight 0% of flight departures
Midnight
6 AM
Noon
6 PM
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