Cheap Flights from Seattle to Castries
No deal from Seattle to Castries has cleared our price bar yet. What we have seen on the route is below.
Across 4 months of observations from Seattle to Castries, the lowest round-trip fare we recorded was $1187, in July. The typical fare was $1339. July was the cheapest month we saw and September the dearest.
The most recent price we saw on this route was $1247 on Caribbean Airlines, United, and Winair, seen Oct 27. It is an unverified observation and may have changed.
See every deal <a href="/from/seattle">from Seattle</a>, <a href="/to/castries">to Castries</a>, or the return direction <a href="/from/castries/to/seattle">Castries to Seattle</a>.
Latest price we saw: Seattle to Castries
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 |
|---|---|---|---|---|---|---|
| Seattle (SEA) to Castries (SLU) | $1247 | 14.9¢ | Jan 3 – Jan 11 | Caribbean Airlines, United, and Winair | Oct 27 | Check price |
Price history: Seattle to Castries
What we observed by month, from our signals database. Unverified observations, not bookable prices.
| Month | Low | Typical | Sightings |
|---|---|---|---|
| Oct 2026 | $1204 | $1256 | 26 |
| Sep 2026 | $1232 | $1380 | 34 |
| Aug 2026 | $1187 | $1532 | 47 |
| Jul 2026 | $1187 | $1187 | 1 |
Frequently asked questions
How many flight deals from Seattle to Castries are on Sparkflights right now?
There are 0 verified deals from Seattle to Castries on the board right now. The list refreshes hourly.
What is the lowest price ever seen from Seattle to Castries?
The lowest fare we've recorded from Seattle to Castries is $1187, based on 108 price observations over 4 months.
How much does a flight from Seattle to Castries cost?
The typical round-trip fare we observed from Seattle to Castries is $1339, against a recorded low of $1187. These are observations, not quotes.
When is the cheapest month to fly Seattle to Castries?
July was the cheapest month we observed from Seattle to Castries and September the dearest, over 4 months of data.
What is the current price from Seattle to Castries?
The most recent fare our sweep saw from Seattle to Castries is $1247, on Oct 27. It is an unverified observation rather than a verified deal, so check it before booking.