Find flights

Cheap flights from Cardiff to Seattle

CWL — SEA
26 Feb — 5 Mar1
1 adult

Best time to book a flight from Cardiff to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Cardiff with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Cardiff to Seattle

Get recent, data-driven insights about flights from Cardiff to Seattle including ideal travel times, pricing trends, and more.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Related info for your journey

Find useful and relevant information for your journey from Cardiff to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Cardiff to Seattle that include hotel bookings?

    Yes. In addition to deals on Cardiff to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Cardiff to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Cardiff to Seattle.

  • Can I find deals for business class flights from Cardiff to Seattle?

    Yes. Cheapflights offers flight deals from Cardiff to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Cardiff to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Cardiff to Seattle (average of £622). Flying from Cardiff to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Cardiff?

Book flights to Cardiff if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Cardiff to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Manchester to Seattle flights
Manchester to Portland flights
Bristol to Seattle flights
Manchester to Spokane flights
Bristol to Portland flights

Top airline flying from Cardiff to Seattle

Discover the top airline that operate flights from Cardiff to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 February 2025.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest£636Average£802FlexibilityNo cancel feeOn-time75%
Search KLM flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Cardiff to Seattle?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Cardiff to Seattle. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Cardiff to Seattle?

Cheapflights helps you find that perfect flight to Seattle from Cardiff by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Cardiff to Seattle with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Cardiff to Seattle flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Cardiff to Seattle become cheaper?

Yes! Start tracking prices for Cardiff to Seattle flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.