Cheap flights from Cardiff to Seattle

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How to find the cheapest flight from
Cardiff (CWL) to Seattle (SEA)

All the information you need to plan the best CWL to SEA flight in 2021: compare Cardiff to Seattle flight prices with the expected peak season, weather and rainfall in Seattle.
When is the cheapest time to fly from Cardiff to Seattle (CWL - SEA)?

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

What is the cheapest day to fly return from Cardiff to Seattle?

Flights from Cardiff to Seattle are generally found to be more expensive on Saturday. This shouldn't discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

Related info for your journey

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

Flight FAQs

From Cardiff to Seattle

How popular is this Cardiff to Seattle flight route?

The Cardiff Cardiff Wales to Seattle/Tacoma Intl flight path was viewed by 24 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

The most popular airlines flying from Cardiff to Seattle are Air France, KLM and Virgin Atlantic. Something to consider prior to booking your flight.

COVID Restrictions

View COVID Travel Restrictions for Seattle, WA

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

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

Most visitors from Cardiff Cardiff Wales will not be allowed to enter Seattle/Tacoma Intl.

COVID-19 testing requirements
Visitors from Cardiff Cardiff Wales must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Seattle/Tacoma Intl.

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

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

Returning to Cardiff Cardiff Wales from Seattle/Tacoma Intl

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Cardiff Cardiff Wales.

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

Hide COVID Travel Restrictions for Seattle, WA

Destination information for Seattle

Things to know before you go - useful duration and weather info for your trip from Cardiff to Seattle.
Today's exchange rate
£1 = $1.39
Average temperature for October in Seattle
16.0 °C
Avg rainfall for October in Seattle
88.0 mm

Airports servicing Cardiff

Airports servicing Seattle

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