HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Lucia

$325+ Cheap flights from Seattle (SEA) to Saint Lucia

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — UVF
Mar 28 — Apr 41
Sat 3/28
Sat 4/4
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Saint Lucia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Saint Lucia

Cheapest flights from Seattle to Saint Lucia
Explore the most affordable flight options available from Seattle to Saint Lucia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 26, 2026.

This American Airlines deal was found by Cheapflights users on 2/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:16 pm
SEA
-
UVF
1 stop12h 29m
American Airlines
Wed 5/133:28 pm
UVF
-
SEA
2 stops21h 46m
American Airlines
Deal found 2/25$547
This Orbitz deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/98:00 am
SEA
-
UVF
1 stop28h 20m
Air Canada
Thu 4/164:15 pm
UVF
-
SEA
2 stops30h 05m
Air Canada
Deal found 2/23$566
This FlightHub deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:00 pm
SEA
-
UVF
2 stops40h 20m
Air Canada
Mon 4/274:15 pm
UVF
-
SEA
1 stop32h 38m
Air Canada
Deal found 2/23$586
This Delta deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/233:55 pm
SEA
-
UVF
1 stop19h 15m
Delta
Wed 11/254:25 pm
UVF
-
SEA
1 stop22h 01m
Delta
Deal found 2/22$668
This FlightHub deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/18:00 am
SEA
-
UVF
1 stop28h 25m
Air Canada
Mon 4/64:15 pm
UVF
-
SEA
1 stop32h 38m
Air Canada
Deal found 2/23$676
This FlightHub deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:00 pm
SEA
-
UVF
2 stops40h 20m
Air Canada
Mon 4/204:15 pm
UVF
-
SEA
1 stop32h 38m
Air Canada
Deal found 2/23$689
This American Airlines deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/17:24 pm
SEA
-
UVF
2 stops16h 34m
American Airlines
Mon 4/63:58 pm
UVF
-
SEA
2 stops22h 30m
American Airlines
Deal found 2/23$694
This Trip.com deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1410:53 pm
SEA
-
SLU
2 stops35h 17m
Multiple Airlines
Thu 4/235:50 pm
SLU
-
SEA
2 stops28h 57m
Multiple Airlines
Deal found 2/22$987
This Mytrip deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/95:40 am
SEA
-
SLU
3 stops34h 20m
Multiple Airlines
Sat 4/185:50 pm
SLU
-
SEA
3 stops32h 00m
Multiple Airlines
Deal found 2/23$1,170
This Mytrip deal was found by Cheapflights users on 2/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:00 am
SEA
-
SLU
2 stops31h 00m
Multiple Airlines
Wed 3/410:15 am
SLU
-
SEA
3 stops32h 04m
Multiple Airlines
Deal found 2/24$1,349
This Mytrip deal was found by Cheapflights users on 2/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:00 am
SEA
-
SLU
2 stops27h 35m
Multiple Airlines
Sun 8/305:00 am
SLU
-
SEA
3 stops38h 56m
Multiple Airlines
Deal found 2/23$1,497
This Mytrip deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:45 am
SEA
-
SLU
3 stops29h 50m
Multiple Airlines
Sat 11/75:50 pm
SLU
-
SEA
3 stops32h 26m
Multiple Airlines
Deal found 2/22$1,510

Find flight deals from Seattle to Saint Lucia

Keep the following information in mind while searching for Seattle to Saint Lucia flight deals. Data was last updated February 26, 2026.

Round-trip from

$547
(American Airlines)

One-way from

$325
(American Airlines)
From Seattle/Tacoma Intl to Saint Lucia
Search Deals
One-way flight from Seattle/Tacoma Intl to Saint Lucia
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Saint Lucia 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 2,558,603 searches. Data last updated February 26, 2026.
Use the filters below to find and compare flights from Seattle to Saint Lucia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 4/20

8:00 pm-3:20 pm

2 stops40h 20m

Castries Hewanorra

Mon 4/27

4:15 pm-3:05 pm

2 stops25h 50m

$586

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 4/9

5:40 am-3:20 pm

2 stops30h 40m

Castries Hewanorra

Thu 4/16

4:15 pm-7:20 pm

2 stops30h 05m

$587

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 5/7

6:19 pm-1:45 pm

2 stops16h 26m

Castries Hewanorra

Wed 5/13

2:45 pm-10:48 am

2 stops23h 03m

$651

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 4/9

1:19 pm-1:45 pm

2 stops21h 26m

Castries Hewanorra

Fri 4/17

3:28 pm-9:35 am

2 stops21h 07m

$761

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 4/9

7:05 pm-3:31 pm

2 stops41h 26m

Castries Hewanorra

Sat 4/18

12:55 pm-9:06 pm

2 stops35h 11m

$790

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 4/10

10:29 pm-2:26 pm

1 stop12h 57m

Castries Hewanorra

Fri 4/17

3:28 pm-10:51 am

2 stops22h 23m

$919

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 4/20

10:16 pm-1:45 pm

1 stop12h 29m

Castries Hewanorra

Mon 4/27

3:28 pm-11:28 am

1 stop23h 00m

$921

SeattleCastries

SEA - SLU

SEASLU

Seattle/Tacoma Intl

Tue 4/14

10:53 pm-1:10 pm

2 stops35h 17m

Castries George F. L. Charle

Thu 4/23

5:50 pm-7:47 pm

2 stops28h 57m

$987

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 5/23

10:30 am-1:40 pm

2 stops24h 10m

Castries Hewanorra

Sat 5/30

4:41 pm-10:15 am

2 stops44h 34m

$1,083

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 4/9

11:30 pm-1:58 pm

1 stop11h 28m

Castries Hewanorra

Sun 4/19

3:22 pm-10:00 am

1 stop21h 38m

$1,133

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/24

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Seattle to Saint Lucia

Have a flexible travel schedule? Discover the best time to fly to Saint Lucia 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Saint Lucia
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Saint Lucia

Get insights into the airlines that provide service to Saint Lucia. 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 Saint Lucia. Reviews last updated February 26, 2026.
See what other customers who have flown with American Airlines from Seattle to Saint Lucia have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,352 reviews

Entertainment

6.9

Comfort

7.2

Boarding

7.5

Overall

7.2

Food

6.4

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,352 reviews
American Airlines
7.2
Good
11,352 reviews

Entertainment

6.9

Comfort

7.2

Boarding

7.5

Overall

7.2

Food

6.4

Crew

8.0

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

Related info for your journey

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

  • What airport do you fly from for flights from Seattle to Saint Lucia?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Saint Lucia from Seattle.

  • How long is the flight from Seattle to Saint Lucia?

    There are many flights that can get you from Seattle to Saint Lucia in 16h 26m. Fly via Air Canada or American Airlines to get the fastest option. There are 4189 mi between Seattle and Saint Lucia. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

  • How can I find direct flights from Seattle to Saint Lucia?

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

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

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

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Seattle to Saint Lucia

Discover the top airline that operate flights from Seattle to Saint Lucia. 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 2,558,603 searches. Data last updated February 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$725Average$867FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.