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$1,126+ Cheap flights from Seattle (SEA) to Cardiff (CWL)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CWL
jul. 30 — ago. 61
From?
To?
mar. 7/30
mar. 8/6
1 adult, Economy
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Cheap flight deals from Seattle to Cardiff

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Cardiff (CWL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated julio 25, 2024.

Popular in

June

Cheapest in

December

Average price

$1,404

Round-trip from

$1,126
(KLM)
High demand for flights, 37% potential price rise
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Best time to find cheap flights, 25% potential price drop
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Average for round-trip flights in July 2024
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From Seattle/Tacoma Intl to Cardiff Wales
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What is the cheapest day to fly round-trip from Seattle to Cardiff?

Users have found that flying from Seattle to Cardiff on a Friday 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.

What is the cheapest month to fly from Seattle to Cardiff?

December can be a great time to fly to Cardiff from Seattle with a flight ticket averaging about $1,044. Cheapflights users have found deals in the month of December for as cheap as $783. The most expensive prices can be found in the month of June.

What is the cheapest time of day to fly from SEA to 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 in the morning, which can drop the price by up to 29% versus a flight at noon.

Find flights from Seattle to Cardiff within your budget

Customize your flight search to find flights from Seattle to Cardiff that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,752,877 searches. Data last updated julio 25, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$1,126 - $1,290

Route

Depart

Return

Price

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 8/9

1 stop19h 15m

Cardiff Wales

mar. 8/13

1 stop32h 30m

$1,126

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 8/9

2 stops16h 45m

Cardiff Wales

mar. 8/13

1 stop25h 00m

$1,131

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

vie. 8/9

2 stops19h 15m

Cardiff Wales

mar. 8/13

2 stops20h 40m

$1,211

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

jue. 8/8

2 stops24h 40m

Cardiff Wales

mar. 8/13

1 stop14h 50m

$1,280

Seattle/Tacoma IntlCardiff Wales

SEA - CWL

SEACWL

Seattle/Tacoma Intl

jue. 8/8

2 stops24h 40m

Cardiff Wales

mar. 8/13

2 stops20h 40m

$1,290

Flights are sorted by cheapest first

Deals found on 7/24

What is the cheapest day to fly from Seattle to Cardiff?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Cardiff. Price data was last updated on July 21, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Cardiff flight should consider departing on Sunday afternoons when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
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Best time to book a flight from Seattle to Cardiff

Have a flexible travel schedule? Discover the best time to fly to Cardiff from Seattle with our price prediction graph.
Estimated round-trip 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.

Temperature and rainfall in Cardiff by month

Plan your trip to Cardiff by taking into account the average temperature and rainfall totals by month.

CWL

Temperature

39.2 - 64.4 °F

If weather is an important factor for your trip to Cardiff, 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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Cardiff

Get insights into the airlines that provide service to Cardiff. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cardiff. Reviews last updated julio 25, 2024.
Peruse reviews from past customers who have flown with KLM and Delta from Seattle to Cardiff to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
9,630 reviews

Comfort

7.9

Overall

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

Delta
8.0
Very good
9,630 reviews
Delta
8.0
Very good
9,630 reviews

Comfort

7.9

Overall

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

KLM
7.9
Good
1,417 reviews
Delta
8.0
Very good
9,630 reviews

Comfort

7.9

Overall

8.0

Food

7.4

Boarding

8.2

Crew

8.6

Entertainment

8.0

Reviews

1 / 10

One of the worst flights ever. I got to the airport early for my 6:48 pm flight and tried to get on the 4:30 ish flight. The gate agent was one of the worst customer service people in my 20 yrs of flying Delta. Very rude and wouldn’t even talk to me about riding standby. Then flight took off 3 hrs late and when Landed in Atlanta, the gate people wouldn’t even try to get me on the plane. It was still there but door was closed. For all of my almost 2 million miles, the worst experience from Delta. I am highly disappointed as it was not my fault I have to sleep in Atlanta and not Jacksonville Florida

Related info for your journey

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

  • Can I find flights from Seattle to Cardiff for under $1,200 on Cheapflights?

    Yes, there are multiple flights from Seattle to Cardiff for under $1,200. The cheapest flight booked recently is on KLM for just $1,126, but on average you can expect to pay $1,207.

  • What are the cheapest airlines flying from Seattle to Cardiff round-trip?

    Cheapflights users have booked flights from Seattle to Cardiff round-trip from $1,126. Another airline that can offer you cheap pricing is Delta.

  • What does SEA to CWL mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to Cardiff Wales Airport flight would often be abbreviated as a SEA to CWL flight.

  • Can I find deals for flights from Seattle to Cardiff that include extra baggage allowance?

    The amount of baggage you can bring on your Seattle to Cardiff flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Seattle to Cardiff with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Cardiff flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

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

  • Can I find deals for flights from Seattle to Cardiff that allow pets onboard?

    Many airlines flying from Seattle to Cardiff offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Seattle to Cardiff?

    Yes, you can often find last-minute deals on Seattle to Cardiff flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Cardiff (average of $708). Flying from Seattle to Cardiff in June is currently the most expensive (average of $1,524). 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.

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Alternative routes for Seattle to Cardiff
See prices for flight routes from nearby airports that may be better suited for you.

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Top 2 airlines flying from Seattle to Cardiff

Discover the top 2 airlines that operate flights from Seattle to Cardiff. 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 2,752,877 searches. Data last updated julio 25, 2024.
AirlineCheapestAverageFlexibilityOn-time
KLMCheapest$709Average$1,051FlexibilityNo cancel feeOn-time75%
DeltaCheapest$740Average$1,022FlexibilityNo cancel feeOn-timeN/A
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Search flights from Seattle to Cardiff by cabin class

Find flights from Seattle to Cardiff, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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