How to find the cheapest flight from
Seattle (SEA) to Cardiff (CWL)
What is the cheapest day to fly round-trip from Seattle to Cardiff?
Travelers have found that booking a Monday departure is the best way to save up to 57% on the cost of booking your flights compared to booking on days of the week where this route is of high demand.
When is the cheapest time to fly from Seattle to Cardiff (SEA - CWL)?
It’s typically best to fly out from Seattle to Cardiff in the afternoon. Doing so could potentially save you 28% on the flight price compared to flying at noon, which is usually more expensive.
Related info for your journey
Useful info, stats and facts about Seattle to Cardiff flights.
Destination information for Cardiff
Things to know before you go. Useful info for your trip from Seattle to Cardiff