HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Lucia

$525+ Cheap flights from Seattle (SEA) to Saint Lucia

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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — UVF
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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

Keep the following information in mind while searching for Seattle to Saint Lucia flight deals. Data was last updated August 14, 2025.

Round-trip from

$525
(American Airlines)
From Seattle/Tacoma Intl to Saint Lucia
Search Deals

Find 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 August 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/14. 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 12/18:00 pmSEA - UVF
2 stops40h 25mAir Canada
Wed 12/105:15 pmUVF - SEA
2 stops25h 11mAir Canada
Deal found 8/14$614
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Mon 12/110:08 pmSEA - UVF
1 stop11h 13mAmerican Airlines
Wed 12/103:05 pmUVF - SEA
1 stop12h 17mAmerican Airlines
Deal found 8/14$634
This Orbitz deal was found by Cheapflights users on 8/12. 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.
Tue 12/910:05 amSEA - UVF
2 stops26h 20mAir Canada
Sun 12/145:15 pmUVF - SEA
1 stop32h 41mAir Canada
Deal found 8/12$652
This American Airlines deal was found by Cheapflights users on 8/12. 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 12/106:18 pmSEA - UVF
2 stops16h 02mAmerican Airlines
Mon 12/154:20 pmUVF - SEA
2 stops22h 18mAmerican Airlines
Deal found 8/12$664
This American Airlines deal was found by Cheapflights users on 8/12. 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.
Tue 12/97:15 pmSEA - UVF
2 stops13h 45mAmerican Airlines
Sun 12/145:05 pmUVF - SEA
2 stops20h 24mAmerican Airlines
Deal found 8/12$669
This Expedia deal was found by Cheapflights users on 8/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2711:59 pmSEA - UVF
1 stop11h 16mJetBlue
Sat 10/42:06 pmUVF - SEA
1 stop35h 14mJetBlue
Deal found 8/12$709
This Priceline deal was found by Cheapflights users on 8/14. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/3010:05 amSEA - UVF
2 stops26h 20mAir Canada
Sun 12/145:15 pmUVF - SEA
1 stop32h 41mAir Canada
Deal found 8/14$728
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Tue 9/308:51 pmSEA - UVF
1 stop14h 26mAmerican Airlines
Fri 10/312:56 pmUVF - SEA
2 stops21h 52mAmerican Airlines
Deal found 8/13$736
This Priceline deal was found by Cheapflights users on 8/12. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/118:15 amSEA - UVF
1 stop28h 10mAir Canada
Mon 12/155:15 pmUVF - SEA
1 stop32h 41mAir Canada
Deal found 8/12$754
This Travelocity deal was found by Cheapflights users on 8/12. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/98:15 amSEA - SLU
2 stops21h 15mMultiple Airlines
Sun 12/145:00 amSLU - SEA
2 stops20h 56mMultiple Airlines
Deal found 8/12$4,363
This Expedia deal was found by Cheapflights users on 8/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/108:15 amSEA - SLU
2 stops24h 55mMultiple Airlines
Mon 12/154:35 pmSLU - SEA
2 stops57h 21mMultiple Airlines
Deal found 8/12$4,402

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 August 14, 2025.
Use the filters below to find and compare flights from Seattle to Saint Lucia that are best for you.

Fly from

Seattle

Fly to

Saint Lucia

Route

Depart

Return

Price

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

10:57 pm-2:30 pm

1 stop11h 33m

Castries Hewanorra

Thu 1/29

5:10 pm-11:56 am

1 stop22h 46m

$525

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 2/10

7:22 pm-2:30 pm

2 stops15h 08m

Castries Hewanorra

Tue 2/24

4:45 pm-10:36 am

2 stops21h 51m

$530

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 12/1

8:00 pm-4:25 pm

2 stops40h 25m

Castries Hewanorra

Wed 12/10

5:15 pm-9:56 pm

1 stop32h 41m

$614

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 12/1

10:08 pm-3:50 pm

1 stop13h 42m

Castries Hewanorra

Wed 12/10

3:05 pm-11:22 pm

1 stop12h 17m

$634

SeattleCastries

SEA - SLU

SEASLU

Seattle/Tacoma Intl

Tue 12/9

8:15 am-9:30 am

2 stops21h 15m

Castries George F. L. Charle

Sun 12/14

5:00 am-9:56 pm

2 stops20h 56m

$4,363

SeattleCastries

SEA - SLU

SEASLU

Seattle/Tacoma Intl

Wed 12/10

8:15 am-11:30 am

3 stops47h 15m

Castries George F. L. Charle

Mon 12/15

4:35 pm-9:56 pm

2 stops57h 21m

$4,402

SeattleCastries

SEA - SLU

SEASLU

Seattle/Tacoma Intl

Thu 12/11

8:15 am-11:30 am

2 stops23h 15m

Castries George F. L. Charle

Mon 12/15

4:35 pm-9:56 pm

2 stops57h 21m

$4,402

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

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

What is the cheapest month to book a flight from Seattle to Saint Lucia?

Currently, January is the cheapest month in which you can book a flight from Seattle to Saint Lucia (average of $556). Flying from Seattle to Saint Lucia in December is currently the most expensive (average of $730). 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.

What is the cheapest time of day to fly from SEA to LC?

Find hourly flight availability from Seattle to Saint Lucia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Saint Lucia as you normally would.

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 August 14, 2025.
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
10,000 reviews

Comfort

7.2

Entertainment

6.9

Overall

7.2

Food

6.5

Crew

8.0

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Comfort

7.2

Entertainment

6.9

Overall

7.2

Food

6.5

Crew

8.0

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.

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.

  • 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.

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

    Currently, January is the cheapest month in which you can book a flight from Seattle to Saint Lucia (average of $556). Flying from Seattle to Saint Lucia in December is currently the most expensive (average of $730). 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.

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.

Alternative routes for Seattle to Saint Lucia

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Luis Munoz Marin Intl flights
Portland to Luis Munoz Marin Intl flights
Seattle to Montego Bay flights
Seattle to Punta Cana flights
Seattle to Port of Spain flights
Seattle to Oranjestad flights
Seattle to Saint Thomas Island flights
Portland to Punta Cana flights
Seattle to Nassau flights
Seattle to Simpson Bay flights
Seattle to Kingston flights
Seattle to Willemstad flights
Seattle to Castries flights
Portland to Montego Bay flights
Portland to Oranjestad flights
Seattle to Christiansted flights
Seattle to Bridgetown flights
Seattle to Santo Domingo flights
Seattle to George Town flights
Spokane to Luis Munoz Marin Intl flights
Portland to Nassau flights
Portland to Saint Thomas Island flights
Seattle to Road Town flights
Portland to Castries flights
Portland to George Town flights
Portland to Santiago de los Caballeros flights
Seattle to Puerto Plata flights
Spokane to Montego Bay flights
Pasco to Luis Munoz Marin Intl flights
Portland to Simpson Bay flights
Portland to Christiansted flights
Portland to Willemstad flights
Seattle to Kralendijk flights
Portland to Providenciales flights
Seattle to St. George's flights
Seattle to Basseterre flights
Portland to Bridgetown flights
Seattle to Providenciales flights
Seattle to St. John's flights
Portland to Santo Domingo flights
Portland to Kingston flights
Portland to St. John's flights
Seattle to Santiago de los Caballeros flights
Seattle to Kingstown flights
Seattle to Freeport flights
Portland to St. George's flights
Portland to Kralendijk flights
Seattle to Havana flights
Seattle to Cap Haitien flights
Portland to Havana flights

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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$590Average$809FlexibilityNo 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.