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Cheap flights from Seattle to Saint Lucia from $315

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 10/18. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Saint Lucia

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
8:21 pm - 1:49 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
14h 28m1 stop Miami
American Airlines Logo
3:02 pm - 10:09 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
22h 07m2 stops Miami Chicago O'Hare Intl
$735American Airlines
Mon, Sep 7 - Mon, Sep 14
American Airlines Logo
5:34 pm - 2:02 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
17h 28m2 stops Dallas/Fort Worth Miami
American Airlines Logo
3:02 pm - 11:11 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
23h 09m2 stops Miami Dallas/Fort Worth
$735American Airlines
Thu, Sep 10 - Wed, Sep 16
American Airlines Logo
6:15 pm - 2:02 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
16h 47m2 stops Phoenix Sky Harbor Intl Miami
American Airlines Logo
3:02 pm - 11:25 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
23h 23m2 stops Miami Charlotte Douglas
$735American Airlines
Thu, Sep 24 - Thu, Oct 1
American Airlines Logo
5:22 pm - 1:49 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
17h 27m2 stops Los Angeles Miami
American Airlines Logo
3:02 pm - 10:09 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
22h 07m2 stops Miami Chicago O'Hare Intl
$735American Airlines
Mon, Sep 7 - Mon, Sep 14
American Airlines Logo
5:22 pm - 1:49 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
17h 27m2 stops Los Angeles Miami
American Airlines Logo
3:02 pm - 9:23 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
21h 21m2 stops Miami Dallas/Fort Worth
$735American Airlines
Mon, Sep 7 - Mon, Sep 14
American Airlines Logo
5:02 pm - 2:02 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
18h 00m2 stops Los Angeles Miami
American Airlines Logo
3:02 pm - 10:09 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
22h 07m2 stops Miami Chicago O'Hare Intl
$735American Airlines
Sat, Sep 26 - Sat, Oct 3
American Airlines Logo
8:50 pm - 2:02 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
14h 12m1 stop Miami
American Airlines Logo
3:02 pm - 11:11 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
23h 09m2 stops Miami Dallas/Fort Worth
$735American Airlines
Sat, Sep 26 - Sat, Oct 3
American Airlines Logo
8:50 pm - 2:02 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
14h 12m1 stop Miami
American Airlines Logo
3:02 pm - 9:23 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
21h 21m2 stops Miami Dallas/Fort Worth
$735American Airlines
Thu, Sep 10 - Wed, Sep 16
Air Canada Logo
8:40 am - 4:40 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
28h 00m2 stops Vancouver Intl Toronto Pearson Intl
Air Canada Logo
5:40 pm - 9:27 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
43h 47m2 stops Toronto Pearson Intl Vancouver Intl
$752Air Canada
Thu, Nov 19 - Sun, Nov 29
Air Canada Logo
7:45 am - 4:40 pmSEA  Seattle/Tacoma Intl-UVF Castries Hewanorra
28h 55m1 stop Toronto Pearson Intl
Air Canada Logo
5:40 pm - 9:27 amUVF  Castries Hewanorra-SEA Seattle/Tacoma Intl
43h 47m2 stops Toronto Pearson Intl Vancouver Intl
$752Air Canada
Thu, Nov 19 - Sun, Nov 29

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American Airlines flights from Seattle to Saint Lucia

Our best American Airlines deals on Seattle to Saint Lucia flight tickets
American Airlines
Sep 7
SEA5:22 pmSeattle/Tacoma Intl
17h 27m
2 stops
UVF1:49 pmCastries Hewanorra
Sep 14
UVF3:02 pmCastries Hewanorra
22h 07m
2 stops
SEA10:09 amSeattle/Tacoma Intl
$735
American Airlines
Oct 5
SEA9:42 pmSeattle/Tacoma Intl
14h 22m
2 stops
UVF3:04 pmCastries Hewanorra
Oct 11
UVF2:51 pmCastries Hewanorra
21h 40m
2 stops
SEA9:31 amSeattle/Tacoma Intl
$740
American Airlines
Sep 7
SEA8:21 pmSeattle/Tacoma Intl
14h 28m
1 stop
UVF1:49 pmCastries Hewanorra
Sep 14
UVF3:02 pmCastries Hewanorra
22h 07m
2 stops
SEA10:09 amSeattle/Tacoma Intl
$837

Air Canada flights from Seattle to Saint Lucia

Our best Air Canada deals on Seattle to Saint Lucia flight tickets
Air Canada
Nov 19
SEA8:40 amSeattle/Tacoma Intl
28h 00m
2 stops
UVF4:40 pmCastries Hewanorra
Nov 29
UVF5:40 pmCastries Hewanorra
43h 47m
2 stops
SEA9:27 amSeattle/Tacoma Intl
$752
Air Canada
Jan 11
SEA3:15 pmSeattle/Tacoma Intl
45h 25m
2 stops
UVF4:40 pmCastries Hewanorra
Jan 14
UVF5:40 pmCastries Hewanorra
24h 57m
2 stops
SEA2:37 pmSeattle/Tacoma Intl
$753
Air Canada
Jan 26
SEA7:45 amSeattle/Tacoma Intl
28h 55m
1 stop
UVF4:40 pmCastries Hewanorra
Jan 29
UVF5:40 pmCastries Hewanorra
31h 19m
1 stop
SEA8:59 pmSeattle/Tacoma Intl
$782

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 August 13, 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

Cheapest round-trip

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Mon 9/7

8:21 pm-1:49 pm

1 stop14h 28m

Castries Hewanorra

Mon 9/14

3:02 pm-10:09 am

2 stops22h 07m

$735

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Thu 9/10

5:34 pm-2:02 pm

2 stops17h 28m

Castries Hewanorra

Wed 9/16

3:02 pm-11:11 am

2 stops23h 09m

$735

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Thu 9/24

6:15 pm-2:02 pm

2 stops16h 47m

Castries Hewanorra

Thu 10/1

3:02 pm-11:25 am

2 stops23h 23m

$735

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Mon 9/7

5:22 pm-1:49 pm

2 stops17h 27m

Castries Hewanorra

Mon 9/14

3:02 pm-10:09 am

2 stops22h 07m

$735

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Mon 9/7

5:22 pm-1:49 pm

2 stops17h 27m

Castries Hewanorra

Mon 9/14

3:02 pm-9:23 am

2 stops21h 21m

$735

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Sat 9/26

5:02 pm-2:02 pm

2 stops18h 00m

Castries Hewanorra

Sat 10/3

3:02 pm-10:09 am

2 stops22h 07m

$735

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Sat 9/26

8:50 pm-2:02 pm

1 stop14h 12m

Castries Hewanorra

Sat 10/3

3:02 pm-11:11 am

2 stops23h 09m

$735
Quickest round-trip

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Thu 9/10

8:50 pm-2:02 pm

1 stop14h 12m

Castries Hewanorra

Wed 9/16

3:02 pm-9:23 am

2 stops21h 21m

$735

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Thu 11/19

8:40 am-4:40 pm

2 stops28h 00m

Castries Hewanorra

Sun 11/29

5:40 pm-9:27 am

2 stops43h 47m

$752

SeattleCastries

SEA Seattle/Tacoma Intl - UVF Castries Hewanorra

SEAUVF

Seattle/Tacoma Intl

Thu 11/19

7:45 am-4:40 pm

1 stop28h 55m

Castries Hewanorra

Sun 11/29

5:40 pm-9:27 am

2 stops43h 47m

$752

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 month to fly to Saint Lucia?

The month of August is, on average, the cheapest month to fly to Saint Lucia from Seattle, with most prices found around $0. If you aren’t able to travel to Saint Lucia during the month of August, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $0.

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

14h 53m

Direct flights

None
The fastest flight from Seattle to Saint Lucia takes 14h 53m
There are no direct flights from Seattle to Saint Lucia. There are no popular flight routes from Seattle to Saint Lucia.
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Frequently asked questions about flying from Seattle to Saint Lucia

  • 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 $668Free CancellationRating
7.1
11,923 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.

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