Cheap flights from Seattle (SEA) to Cardiff (CWL)

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

All the information you need to plan the best SEA to CWL flight in 2022: compare Seattle to Cardiff flight prices with the expected peak season, weather and rainfall in Cardiff.
When is the cheapest time to fly from Seattle to Cardiff (SEA - CWL)?

When flying from Seattle to Cardiff, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 4% versus a flight in the morning.

What is the cheapest day to fly round-trip from Seattle to Cardiff?

Users have found that flying from Seattle to Cardiff on a Tuesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

Cheap flights from Seattle to Cardiff in August, September 2022

The best prices found for SEA to CWL flights for August, September
14 Sep - 30 Sep
$1,140pp
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
   
2 STOPS
SEA
Seattle/Tacoma Intl
14 Sep - 30 Sep
$1,306pp
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
14 Sep - 30 Sep
$1,802pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl

Seattle/Tacoma Intl to Cardiff 2022 flight deals

Cheap flights to Cardiff from Seattle found for this year
3 Oct - 11 Oct
$777pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
3 Oct - 11 Oct
$781pp
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
3 Oct - 11 Oct
$791pp
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
   
2 STOPS
SEA
Seattle/Tacoma Intl

Cheap Delta flights from Seattle to Cardiff

3 Oct - 11 Oct
$777pp
SEA
Seattle/Tacoma Intl
Delta
 
1 STOP
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
3 Oct - 11 Oct
$781pp
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
 
1 STOP
SEA
Seattle/Tacoma Intl
3 Oct - 11 Oct
$791pp
SEA
Seattle/Tacoma Intl
Delta
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
Delta
   
2 STOPS
SEA
Seattle/Tacoma Intl

Cheap KLM flights from Seattle to Cardiff

21 Oct - 28 Oct
$832pp
SEA
Seattle/Tacoma Intl
KLM
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
KLM
 
1 STOP
SEA
Seattle/Tacoma Intl
21 Oct - 28 Oct
$842pp
SEA
Seattle/Tacoma Intl
KLM
   
2 STOPS
CWL
Cardiff Wales
CWL
Cardiff Wales
KLM
   
2 STOPS
SEA
Seattle/Tacoma Intl
18 Aug - 27 Aug
$2,378pp
SEA
Seattle/Tacoma Intl
KLM
 
1 STOP
CWL
Cardiff Wales
CWL
Cardiff Wales
KLM
 
1 STOP
SEA
Seattle/Tacoma Intl

Related info for your journey

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

Flight FAQs

From Seattle to Cardiff

Which airlines flying from Seattle/Tacoma Intl to Cardiff Wales have flexible changes due to COVID-19?

Some of our airline partners flying from Seattle/Tacoma Intl to Cardiff Wales have new flexible policies in place due to COVID-19. KLM is one of the carriers where you may find flexible change policies. You can use our site to filter for airlines like KLM with this kind of flexibility.

Can I find flights from Seattle to Cardiff for under $800 on Cheapflights?

Yes, there are multiple flights from Seattle to Cardiff for under $800. The cheapest flight booked recently is on Delta for just $777, but on average you can expect to pay $1,356.

What are the cheapest flights from Seattle to Cardiff?

Looking for the cheapest flight from Seattle to Cardiff? While on average our users pay $780, our data indicates the cheapest price to be $780. The most popular route (Seattle/Tacoma Intl - Cardiff Wales), is priced around $777.

COVID Restrictions

View COVID Travel Restrictions for Cardiff, Wales

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

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

Most visitors from Seattle/Tacoma Intl can enter Cardiff Wales without restrictions.

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 Cardiff Wales.

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

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

Returning to Seattle/Tacoma Intl from Cardiff Wales

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

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

Hide COVID Travel Restrictions for Cardiff, Wales