Cheap Flights from Cardiff to Seattle
No deal from Cardiff to Seattle has cleared our price bar yet. What we have seen on the route is below.
Across 3 months of observations from Cardiff to Seattle, the lowest round-trip fare we recorded was $1205, in October. The typical fare was $1656. October was the cheapest month we saw and September the dearest.
The most recent price we saw on this route was $1248 on Delta and KLM, seen Oct 16. It is an unverified observation and may have changed.
See every deal <a href="/from/cardiff">from Cardiff</a>, <a href="/to/seattle">to Seattle</a>, or the return direction <a href="/from/seattle/to/cardiff">Seattle to Cardiff</a>.
Latest price we saw: Cardiff to Seattle
The most recent round-trip fare our sweep found on this route. It is not verified and may have changed since the date shown.
| From | Price | Per mile | Travel dates | Airline | Seen | Check price |
|---|---|---|---|---|---|---|
| Cardiff (CWL) to Seattle (SEA) | $1248 | 13.2¢ | Oct 17 – Oct 23 | Delta and KLM | Oct 16 | Check price |
Price history: Cardiff to Seattle
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $1205 | $1361 | 8 |
| Sep 2026 | $1517 | $1731 | 4 |
| Aug 2026 | $1474 | $1876 | 15 |
Frequently asked questions
How many flight deals from Cardiff to Seattle are on Sparkflights right now?
There are 0 verified deals from Cardiff to Seattle on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Cardiff to Seattle?
The lowest fare we've recorded from Cardiff to Seattle is $1205, based on 27 price observations over 3 months.
How much does a flight from Cardiff to Seattle cost?
The typical round-trip fare we observed from Cardiff to Seattle is $1656, against a recorded low of $1205. These are observations, not quotes.
When is the cheapest month to fly Cardiff to Seattle?
October was the cheapest month we observed from Cardiff to Seattle and September the dearest, over 3 months of data.
What is the current price from Cardiff to Seattle?
The most recent fare our sweep saw from Cardiff to Seattle is $1248, on Oct 16. It is an unverified observation rather than a verified deal, so check it before booking.