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Find cheap one-way flights from Cardiff to Seattle starting at US$1,796.

Whether you’re going for a one-way or round-trip to Seattle, we’ve got you covered! Check out these different flight options from Cardiff below.

  • One way
  • Round-trip
      • CWL10:20
        33h 30m
        1 stop
        SEA11:50
        Sat, Jan 4|Cardiff - Seattle|Virgin Atlantic
        US$1,796US$3,391
        47% OFF
        47% OFF
        US$3,391US$1,796

        Choose Virgin Atlantic flights from Cardiff to Seattle.The one-way connecting flight with Virgin Atlantic departs from Cardiff Airport on Sat, Jan 4, arriving at Seattle-Tacoma International Airport.One-way Prices start from US$1,796 including taxes and charges.

      • CWL10:20
        33h 30m
        1 stop
        SEA11:50
        Sat, Jan 4|Cardiff - Seattle|Delta Air Lines
        US$1,810US$3,391
        47% OFF
        47% OFF
        US$3,391US$1,810

        Choose Delta Air Lines flights from Cardiff to Seattle.The one-way connecting flight with Delta Air Lines departs from Cardiff Airport on Sat, Jan 4, arriving at Seattle-Tacoma International Airport.One-way Prices start from US$1,810 including taxes and charges.

      • CWL17:25
        26h 32m
        1 stop
        SEA11:57
        Tue, Dec 31|Cardiff - Seattle|Virgin Atlantic
        US$2,806US$3,391
        17% OFF
        17% OFF
        US$3,391US$2,806

        Choose Virgin Atlantic flights from Cardiff to Seattle.The one-way connecting flight with Virgin Atlantic departs from Cardiff Airport on Tue, Dec 31, arriving at Seattle-Tacoma International Airport.One-way Prices start from US$2,806 including taxes and charges.

      • CWL10:20
        33h 37m
        1 stop
        SEA11:57
        Tue, Dec 31|Cardiff - Seattle|Air France
        US$2,848
        US$2,848

        Choose Air France flights from Cardiff to Seattle.The one-way connecting flight with Air France departs from Cardiff Airport on Tue, Dec 31, arriving at Seattle-Tacoma International Airport.One-way Prices start from US$2,848 including taxes and charges.

      • CWL17:25
        26h 32m
        1 stop
        SEA11:57
        Tue, Dec 31|Cardiff - Seattle|KLM
        US$2,848
        US$2,848

        Choose KLM flights from Cardiff to Seattle.The one-way connecting flight with KLM departs from Cardiff Airport on Tue, Dec 31, arriving at Seattle-Tacoma International Airport.One-way Prices start from US$2,848 including taxes and charges.

      • CWL01:00 pm
        3h 5m
        Nonstop
        SEA02:00 pm
        Sun, Jan 5|Cardiff - Seattle|Virgin Atlantic
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to book flights from Cardiff to Seattle?

Explore the best time to buy affordable tickets to Seattle with our price trend chart, which predicts how flight prices will change in the coming weeks from previous data.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Cheapest airlines flights from Cardiff to Seattle

Compare prices from various providers below to understand which option best suits your travel needs, before enjoying a comfortable journey with a trusted airline from Cardiff to Seattle.

Vueling Airlines
From US$1,202
KLM
From US$1,661
Air France
From US$1,721
Virgin Atlantic
From US$1,796
Delta Air Lines
From US$1,810
British Airways
From US$1,889
Thomson Airways
From US$2,054
Loganair
From US$6,421

Find more flights and airlines

Find cheap flights from Cardiff to Seattle by different airports

Searching for potential routes that might be cheaper and faster? There are a few alternative ways to get to Seattle from Cardiff which could help you save money and time.

  • Cheapest
    KLM
    CWL
    10:25
    33h 21m
    2 transfer
    SEA
    11:46
    Cardiff Airport - Seattle-Tacoma International Airport
    Tue, Feb 4KLM
    US$660
  • KLM
    CWL
    10:25
    33h 21m
    2 transfer
    SEA
    11:46
    Cardiff Airport - Seattle-Tacoma International Airport
    Tue, Feb 4KLM
    US$660
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Cardiff (CWL) to Seattle (SEA) the cheapest?

    Airlines adjust prices for flights from Cardiff to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Cardiff (CWL) to Seattle (SEA) cost?

    According to Trip.com's data, the lowest price is around $2,455.

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17 km. It takes about 30 minutes by taxi.
    • The distance from Lake Union Sea Plane Base to downtown is about 2 km. It takes about 20 minutes by taxi.

How to find a cheap flight from Cardiff to Seattle

Understanding the common pitfalls when booking your flight tickets can help you save massively when it comes time to fly. We’ve listed our six essential steps to keep in mind when you’re booking flight tickets to help you find the best price.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Cardiff to Seattle Flight Information

Cheapest nonstop flight price$1,796
Off-season for travelNovember
Peak season for travelOctober
Flight distance7,583.01 km
Popular airlineAir France

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