$558 Find Cheap Flights from Seattle to Saint Lucia

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Saint Lucia departing on 5/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Book Cheap Seattle to Saint Lucia Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Saint Lucia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Saint Lucia

Wed, May 27 - Tue, Jun 2
Air Canada Logo
7:20 pm - 2:05 pm
SEA
-
UVF
39h 45m
2 stops
Air Canada Logo
3:05 pm - 9:08 pm
UVF
-
SEA
33h 03m
1 stop
$558Air Canada
Thu, May 28 - Fri, Jun 5
Air Canada Logo
8:00 am - 2:05 pm
SEA
-
UVF
27h 05m
1 stop
Air Canada Logo
3:05 pm - 9:08 pm
UVF
-
SEA
33h 03m
1 stop
$568Air Canada
Mon, May 25 - Tue, Jun 2
Air Canada Logo
5:40 am - 2:05 pm
SEA
-
UVF
29h 25m
2 stops
Air Canada Logo
3:05 pm - 9:08 pm
UVF
-
SEA
33h 03m
1 stop
$584Air Canada
Wed, Apr 8 - Mon, Apr 13
Air Canada Logo
8:00 am - 3:25 pm
SEA
-
UVF
28h 25m
1 stop
Air Canada Logo
4:05 pm - 9:53 pm
UVF
-
SEA
32h 48m
1 stop
$587Air Canada
Wed, Apr 8 - Mon, Apr 13
Air Canada Logo
8:00 am - 3:25 pm
SEA
-
UVF
28h 25m
1 stop
Air Canada Logo
4:05 pm - 9:53 pm
UVF
-
SEA
32h 48m
1 stop
$591Air Canada
Thu, Jun 4 - Fri, Jun 12
Air Canada Logo
8:00 am - 2:10 pm
SEA
-
UVF
27h 10m
1 stop
Air Canada Logo
3:05 pm - 9:08 pm
UVF
-
SEA
33h 03m
1 stop
$601Air Canada
Tue, Apr 28 - Tue, May 5
Air Canada Logo
10:20 am - 3:20 pm
SEA
-
UVF
26h 00m
2 stops
Air Canada Logo
3:15 pm - 9:08 pm
UVF
-
SEA
32h 53m
1 stop
$611Air Canada
Wed, May 6 - Fri, May 15
Air Canada Logo
7:20 pm - 2:05 pm
SEA
-
UVF
39h 45m
2 stops
Air Canada Logo
3:15 pm - 9:08 pm
UVF
-
SEA
32h 53m
1 stop
$614Air Canada
Sun, Apr 12 - Sun, Apr 19
Multiple Airlines Logo
8:00 am - 3:35 pm
SEA
-
SLU
28h 35m
2 stops
Multiple Airlines Logo
5:00 am - 9:38 am
SLU
-
SEA
31h 38m
3 stops
$1,500Multiple Airlines
Sat, Apr 4 - Sat, Apr 11
Multiple Airlines Logo
3:40 pm - 7:00 pm
SEA
-
SLU
24h 20m
3 stops
Multiple Airlines Logo
5:50 pm - 10:53 pm
SLU
-
SEA
32h 03m
3 stops
$1,575Multiple Airlines
Useful Info

Good to know

Low seasonAugust
Cheapest flight$558
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 28% lower on average.
Flight from Seattle to Castries

FAQs - booking Saint Lucia flights

  • How does KAYAK find such low prices on flights from Seattle to Saint Lucia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Saint Lucia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Saint Lucia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Seattle to Saint Lucia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Saint Lucia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Seattle to Saint Lucia with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Saint Lucia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Seattle to Saint Lucia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Saint Lucia

 
Need help choosing which airline to fly with from Seattle to Saint Lucia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11467 reviews
7.9Crew
7.5Boarding
7.2Comfort
6.9Entertainment
6.4Food
Airline reviews

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

2.0 Mediocresteven, Mar 2026
MIA - CLE
Read more American Airlines reviews

After changing the departure gate 5 times making us mo e from one side of the airport to the other and then back the flight was delayed nearly 2 hours. The male flight attendant had a bad attitude with the guest being condescending, disrespectful with people who were already on edge.

Easy boarding. Rows are smaller but that may be an older and bigger me now :)

It would have been nice if American tried to care.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

I booked 1st class, my flights were changed and I was sitting in the middle at the back of the plane. A far cry from the 1st class I purchased for my flights. I am grateful I arrived on time.

Aging planer and NO wifi on a 14 hour day flight. Unless you are retired or don't need to work or be in touch with the world... The lack of Wifif really ruined the flight. And the old plane - really showing it's age, wasn't great

There was no beverage service and the only time I saw a crew member walk through the cabin is when we were preparing to land.

Our flight was delayed 3 times and this is why I am giving such low reviews. Everything else was okay but being in the airport at 4:30pm for my initial flight at 7pm to not leave until after 9:30pm is insane,

Flights were constantly delayed. CRW took 50 minutes to get bags

Flight has been delayed every time I've ever taken it. Seats uncomfortable. Children behind me yelling the entire flight. Some of this is out of their control but overall just consistently not a great experience.

Everything you need to know for your flight from Seattle to Saint Lucia

Information on your arrival and departure airports

Seattle (SEA)