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Cheap flights from Seattle to Saint Lucia from $398

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Saint Lucia departing on 5/22. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Saint Lucia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
4:05 pm - 3:05 pm
SEA
-
UVF
19h 00m1 stop
Delta Logo
4:25 pm - 10:07 am
UVF
-
SEA
21h 42m1 stop
$491Delta
Sun, Jan 18 - Thu, Jan 29
American Airlines Logo
9:45 pm - 4:02 pm
SEA
-
UVF
14h 17m2 stops
American Airlines Logo
5:02 pm - 11:01 am
UVF
-
SEA
21h 59m2 stops
$496American Airlines
Sun, Jan 18 - Thu, Jan 29
Air Canada Logo
8:00 pm - 4:20 pm
SEA
-
UVF
16h 20m2 stops
Air Canada Logo
5:15 pm - 7:16 pm
UVF
-
SEA
30h 01m2 stops
$552Air Canada
Tue, Jan 13 - Mon, Jan 19
Air Canada Logo
8:10 am - 4:20 pm
SEA
-
UVF
28h 10m1 stop
Air Canada Logo
5:15 pm - 10:16 pm
UVF
-
SEA
33h 01m1 stop
$564Air Canada
Tue, Jan 13 - Mon, Jan 19
Air Canada Logo
8:00 pm - 4:20 pm
SEA
-
UVF
16h 20m2 stops
Air Canada Logo
5:15 pm - 2:31 pm
UVF
-
SEA
25h 16m2 stops
$592Air Canada
Tue, Jan 27 - Mon, Feb 2
Air Canada Logo
10:05 am - 4:25 pm
SEA
-
UVF
26h 20m2 stops
Air Canada Logo
4:15 pm - 7:16 pm
UVF
-
SEA
30h 01m2 stops
$636Air Canada
Thu, Mar 5 - Mon, Mar 16
American Airlines Logo
10:11 pm - 2:50 pm
SEA
-
UVF
12h 39m1 stop
American Airlines Logo
3:18 pm - 11:27 am
UVF
-
SEA
23h 09m1 stop
$642American Airlines
Thu, Mar 5 - Mon, Mar 16
Air Canada Logo
8:10 am - 4:25 pm
SEA
-
UVF
28h 15m1 stop
Air Canada Logo
4:15 pm - 10:16 pm
UVF
-
SEA
33h 01m1 stop
$646Air Canada
Thu, Mar 5 - Wed, Mar 18
American Airlines Logo
7:24 pm - 4:00 pm
SEA
-
UVF
16h 36m2 stops
American Airlines Logo
3:58 pm - 11:27 am
UVF
-
SEA
22h 29m2 stops
$647American Airlines
Thu, Mar 5 - Mon, Mar 16
Multiple Airlines Logo
8:10 am - 3:35 pm
SEA
-
SLU
52h 25m2 stops
Multiple Airlines Logo
4:20 pm - 9:51 pm
SLU
-
SEA
56h 31m2 stops
$4,020Multiple Airlines
Sat, Mar 21 - Mon, Mar 30

Air Canada flights from Seattle to Saint Lucia

Our best Air Canada deals on Seattle to Saint Lucia flight tickets
Air Canada
Jan 13
SEA8:10 amSeattle/Tacoma Intl
28h 10m
1 stop
UVF4:20 pmCastries Hewanorra
Jan 19
UVF5:15 pmCastries Hewanorra
32h 51m
2 stops
SEA10:06 pmSeattle/Tacoma Intl
$552
Find similar
Air Canada
Jan 13
SEA8:10 amSeattle/Tacoma Intl
28h 10m
1 stop
UVF4:20 pmCastries Hewanorra
Jan 19
UVF5:15 pmCastries Hewanorra
33h 01m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
$564
Find similar
Air Canada
Jan 27
SEA5:50 amSeattle/Tacoma Intl
30h 30m
2 stops
UVF4:20 pmCastries Hewanorra
Feb 2
UVF5:15 pmCastries Hewanorra
33h 01m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
$592
Find similar

American Airlines flights from Seattle to Saint Lucia

Our best American Airlines deals on Seattle to Saint Lucia flight tickets
American Airlines
Jan 18
SEA9:45 pmSeattle/Tacoma Intl
13h 18m
1 stop
UVF3:03 pmCastries Hewanorra
Jan 29
UVF5:02 pmCastries Hewanorra
22h 43m
2 stops
SEA11:45 amSeattle/Tacoma Intl
$496
Find similar
American Airlines
Mar 5
SEA10:11 pmSeattle/Tacoma Intl
12h 39m
1 stop
UVF2:50 pmCastries Hewanorra
Mar 16
UVF3:18 pmCastries Hewanorra
23h 09m
1 stop
SEA11:27 amSeattle/Tacoma Intl
$642
Find similar
American Airlines
Mar 5
SEA7:24 pmSeattle/Tacoma Intl
16h 36m
2 stops
UVF4:00 pmCastries Hewanorra
Mar 16
UVF3:58 pmCastries Hewanorra
22h 29m
2 stops
SEA11:27 amSeattle/Tacoma Intl
$647
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 23, 2025.
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

Sun 1/18

4:05 pm-3:05 pm

1 stop19h 00m

Castries Hewanorra

Thu 1/29

4:25 pm-10:07 am

1 stop21h 42m

$491

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

9:45 pm-4:02 pm

2 stops14h 17m

Castries Hewanorra

Thu 1/29

5:02 pm-11:01 am

2 stops21h 59m

$496

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 1/13

8:00 pm-4:20 pm

2 stops16h 20m

Castries Hewanorra

Mon 1/19

5:15 pm-7:16 pm

2 stops30h 01m

$552

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 1/13

8:10 am-4:20 pm

1 stop28h 10m

Castries Hewanorra

Mon 1/19

5:15 pm-10:16 pm

1 stop33h 01m

$564

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 1/27

8:00 pm-4:20 pm

2 stops16h 20m

Castries Hewanorra

Mon 2/2

5:15 pm-2:31 pm

2 stops25h 16m

$592

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 3/5

10:05 am-4:25 pm

2 stops26h 20m

Castries Hewanorra

Mon 3/16

4:15 pm-7:16 pm

2 stops30h 01m

$636

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 3/5

10:11 pm-2:50 pm

1 stop12h 39m

Castries Hewanorra

Mon 3/16

3:18 pm-11:27 am

1 stop23h 09m

$642

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 3/5

8:10 am-4:25 pm

1 stop28h 15m

Castries Hewanorra

Wed 3/18

4:15 pm-10:16 pm

1 stop33h 01m

$646

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 3/5

7:24 pm-4:00 pm

2 stops16h 36m

Castries Hewanorra

Mon 3/16

3:58 pm-11:27 am

2 stops22h 29m

$647

SeattleCastries

SEA - SLU

SEASLU

Seattle/Tacoma Intl

Sat 3/21

8:10 am-3:35 pm

2 stops52h 25m

Castries George F. L. Charle

Mon 3/30

4:20 pm-9:51 pm

2 stops56h 31m

$4,020

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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See travel insights to Saint Lucia from

How to get the cheapest flight ticket from Seattle to Saint Lucia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest day to depart on your flight to Saint Lucia?

Our data shows that Tuesday is the least expensive day to fly to Saint Lucia. Tickets to fly out on this day can be as low as $590. On the other hand, Sunday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $924.

Cheap Seattle to Saint Lucia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Saint Lucia

Fastest flight time

15h 02m

Direct flights

None
The fastest flight from Seattle to Saint Lucia takes 15h 02m
There are no direct flights from Seattle to Saint Lucia. There are no popular flight routes from Seattle to Saint Lucia.
Search flight deals

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Saint Lucia?

    Prices for flights from Seattle/Tacoma Intl Airport to Saint Lucia are refreshed on a daily basis.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Saint Lucia?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Saint Lucia?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Saint Lucia.

  • What documentation or ID do you need to fly to Saint Lucia?

    The travel and health documents you'll need for your trip to Saint Lucia may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Saint Lucia. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Seattle to Saint Lucia

Compare and see reviews for airlines that fly from Seattle to Saint Lucia with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $615Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Saint Lucia?

It is quick and easy to find Seattle to Saint Lucia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Saint Lucia that suits you.

Can I find flights from Seattle to Saint Lucia with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Saint Lucia flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Saint Lucia?

momondo provides multiple filters to help you find the best flight to Saint Lucia from Seattle. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Seattle to Saint Lucia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Saint Lucia from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Saint Lucia trip

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