Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Cardiff from $872

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Cardiff departing on 4/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Deals available from 900+ travel sites.

"This year, momondo is the #1 place for airfares on the internet."
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.
Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.
Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.
Price Alerts
Price Alerts
Not ready to book? to track prices.

Find the cheapest flights from Seattle to Cardiff

Cheap round-trip flights

These are some of the best round-trip flight deals from Seattle to Cardiff that have been recently found on momondo from popular airlines, departing in the coming months.

Cheap one-way flights

Flying one-way? These are some of the best deals recently discovered on momondo for flights from Seattle to Cardiff.

Cheap last minute flights

Planning a quick getaway from Seattle to Cardiff? These are the last-minute flight deals available now.

Cheap direct flights

If you prefer a non-stop journey, check out our latest direct flight deals to Cardiff, so you can enjoy a seamless trip without layovers.

Cheap bus & train deals from Seattle to Cardiff

Find recent round-trip train or bus tickets from Seattle to Cardiff.

All round-trip flight deals to Cardiff

The cheapest plane tickets to Cardiff found on KAYAK recently.
5:30 pm - 4:45 pmSEA-CWL
15h 15m1 stop
5:15 pm - 11:15 amCWL-SEA
26h 00m1 stop
$872KLM
Find Deal
Tue, Apr 1 - Thu, Apr 10
7:20 am - 9:15 amSEA-CWL
17h 55m2 stops
5:15 pm - 11:15 amCWL-SEA
26h 00m1 stop
$876KLM
Find Deal
Tue, Apr 1 - Thu, Apr 10
7:35 am - 9:15 amSEA-CWL
17h 40m2 stops
9:45 am - 10:15 pmCWL-SEA
20h 30m2 stops
$886KLM
Find Deal
Tue, Apr 1 - Thu, Apr 10
8:00 pm - 7:55 amSEA-CWL
27h 55m1 stop
4:10 pm - 11:58 pmCWL-SEA
39h 48m2 stops
$1,783
Find Deal
Fri, Dec 27 - Fri, Jan 3
2:13 pm - 4:55 pmSEA-CWL
18h 42m1 stop
5:25 pm - 11:50 amCWL-SEA
26h 25m1 stop
$1,866
Find Deal
Fri, Dec 27 - Fri, Jan 3
2:13 pm - 4:55 pmSEA-CWL
18h 42m1 stop
5:25 pm - 11:50 amCWL-SEA
26h 25m1 stop
$1,871
Find Deal
Sat, Dec 28 - Sat, Jan 4
8:25 am - 9:50 amSEA-CWL
17h 25m2 stops
5:25 pm - 11:50 amCWL-SEA
26h 25m1 stop
$1,910
Find Deal
Sat, Dec 28 - Sat, Jan 4
3:10 pm - 9:50 amSEA-CWL
34h 40m3 stops
5:25 pm - 5:00 pmCWL-SEA
31h 35m3 stops
$2,169
Find Deal
Fri, Dec 27 - Fri, Jan 3
2:13 pm - 4:55 pmSEA-CWL
18h 42m1 stop
10:20 am - 11:50 amCWL-SEA
33h 30m1 stop
$2,210KLM
Find Deal
Sat, Dec 28 - Sat, Jan 4
9:55 am - 4:55 pmSEA-CWL
23h 00m2 stops
5:25 pm - 4:54 pmCWL-SEA
31h 29m2 stops
$2,320Virgin Atlantic
Find Deal
Fri, Dec 27 - Fri, Jan 3
SEA-CWL
4709 mimulti-stop
Multiple Airlines
Find Deal

KLM flights from Seattle to Cardiff

Our best KLM deals on Seattle to Cardiff flight tickets
KLM
Apr 1
SEA5:30 pmSeattle/Tacoma Intl
15h 15m
1 stop
CWL4:45 pmCardiff Wales
Apr 10
CWL5:15 pmCardiff Wales
26h 00m
1 stop
SEA11:15 amSeattle/Tacoma Intl
KLM
Apr 1
SEA7:20 amSeattle/Tacoma Intl
17h 55m
2 stops
CWL9:15 amCardiff Wales
Apr 10
CWL5:15 pmCardiff Wales
26h 00m
1 stop
SEA11:15 amSeattle/Tacoma Intl
KLM
Apr 1
SEA7:35 amSeattle/Tacoma Intl
17h 40m
2 stops
CWL9:15 amCardiff Wales
Apr 10
CWL9:45 amCardiff Wales
20h 30m
2 stops
SEA10:15 pmSeattle/Tacoma Intl

How to get the cheapest flight ticket from Seattle to Cardiff

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart Seattle for Cardiff?

Wednesday. The cheapest day of the week is typically Wednesday. The most expensive is typically Monday

When is the cheapest time to fly from Seattle to Cardiff?

Seattle to Cardiff flights are currently only available in the afternoon

What is the cheapest airline that flies to Cardiff from Seattle?

KLM. KLM is the most popular carrier operating from Seattle to Cardiff

What is the cheapest Seattle to Cardiff flight route?

Seattle/Tacoma Intl - Cardiff Wales. Fly from Seattle/Tacoma Intl to Cardiff Wales for the best Seattle - Cardiff flight prices

When to book flights from Seattle to Cardiff

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Cardiff according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Cardiff (SEA to CWL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Cardiff

Best Price Found

$872

Fastest flight time

15h 15m

Direct flights

None

Airports in Cardiff

1 airport
The best flight deal from Seattle to Cardiff found on momondo in the last 72 hours is $872
The fastest flight from Seattle to Cardiff takes 15h 15m
There are no direct flights from Seattle to Cardiff. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Cardiff Wales Airport.
There is 1 airport near Cardiff: Cardiff Wales (CWL)

  • How far is Seattle/Tacoma Intl to Cardiff Wales by plane?

    The straight-line distance from Seattle/Tacoma Intl to Cardiff Wales is 4700.6 mi. In terms of flight time, this usually takes a little over 15h 15m.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Cardiff Wales Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Cardiff Wales Airport.

  • What documentation or ID do you need to fly to Cardiff Wales Airport?

    The necessary travel and health documents for your Cardiff Wales Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Cardiff?


Best airlines flying from Seattle to Cardiff

Compare and see reviews for airlines that fly from Seattle to Cardiff with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $721Free CancellationRating
7.8
1,346 reviews
Search KLM flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Cardiff?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Cardiff. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Cardiff with flexible booking policies on momondo?

momondo does allow users to show only those flights to Cardiff from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to Cardiff?

Once all potential Seattle to Cardiff flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Cardiff right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Cardiff, momondo offers a useful price alert feature which will track prices for flights to Cardiff from Seattle and alert you when they change.


An easier way to manage your Cardiff trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
From?
To?
Mon 11/18
Mon 11/25
Email me momondo's favorite deals

Find better results for your trip to the United Kingdom

Fly your favorite airline to Cardiff

Airlines are sorted and displayed according to clicks in the past 7 days on momondo