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Cheap flights from Seattle to Saint Lucia from $270

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 9/2. 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

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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.
Air Canada Logo
8:00 am - 3:25 pm
SEA
-
UVF
28h 25m
1 stop
Air Canada Logo
4:20 pm - 9:53 pm
UVF
-
SEA
32h 33m
1 stop
$642Air Canada
Wed, Apr 22 - Wed, Apr 29
Air Canada Logo
10:20 am - 3:25 pm
SEA
-
UVF
26h 05m
2 stops
Air Canada Logo
4:20 pm - 3:05 pm
UVF
-
SEA
25h 45m
2 stops
$668Air Canada
Wed, Apr 22 - Wed, Apr 29
Delta Logo
3:55 pm - 2:23 pm
SEA
-
UVF
19h 28m
1 stop
Delta Logo
3:38 pm - 10:05 am
UVF
-
SEA
21h 27m
1 stop
$704Delta
Mon, Sep 14 - Wed, Sep 23
American Airlines Logo
9:50 pm - 2:15 pm
SEA
-
UVF
13h 25m
1 stop
American Airlines Logo
3:09 pm - 9:20 am
UVF
-
SEA
21h 11m
2 stops
$709American Airlines
Tue, Sep 1 - Tue, Sep 8
American Airlines Logo
11:55 pm - 2:15 pm
SEA
-
UVF
11h 20m
1 stop
American Airlines Logo
3:15 pm - 3:40 pm
UVF
-
SEA
27h 25m
1 stop
$722American Airlines
Tue, Sep 1 - Tue, Sep 8
Delta Logo
3:55 pm - 2:23 pm
SEA
-
UVF
19h 28m
1 stop
Delta Logo
3:38 pm - 10:05 am
UVF
-
SEA
21h 27m
1 stop
$728Delta
Wed, Sep 9 - Wed, Sep 23
Delta Logo
3:55 pm - 2:23 pm
SEA
-
UVF
19h 28m
1 stop
Delta Logo
3:38 pm - 10:05 am
UVF
-
SEA
21h 27m
1 stop
$753Delta
Thu, Sep 10 - Wed, Sep 23
United Airlines Logo
6:00 pm - 1:31 pm
SEA
-
UVF
16h 31m
2 stops
United Airlines Logo
2:35 pm - 9:35 am
UVF
-
SEA
22h 00m
2 stops
$778United Airlines
Fri, Sep 11 - Sat, Sep 19
JetBlue Logo
10:20 pm - 3:15 pm
SEA
-
UVF
13h 55m
1 stop
JetBlue Logo
4:20 pm - 10:24 pm
UVF
-
SEA
33h 04m
1 stop
$803JetBlue
Wed, Sep 2 - Tue, Sep 8
American Airlines Logo
5:31 pm - 1:50 pm
SEA
-
UVF
17h 19m
2 stops
American Airlines Logo
4:00 pm - 11:46 am
UVF
-
SEA
22h 46m
2 stops
$811American Airlines
Mon, Sep 14 - Mon, Sep 21

Air Canada flights from Seattle to Saint Lucia

Our best Air Canada deals on Seattle to Saint Lucia flight tickets
Air Canada
Apr 22
SEA8:00 amSeattle/Tacoma Intl
28h 25m
1 stop
UVF3:25 pmCastries Hewanorra
Apr 29
UVF4:20 pmCastries Hewanorra
32h 33m
1 stop
SEA9:53 pmSeattle/Tacoma Intl
$642
Air Canada
Apr 22
SEA10:20 amSeattle/Tacoma Intl
26h 05m
2 stops
UVF3:25 pmCastries Hewanorra
Apr 29
UVF4:20 pmCastries Hewanorra
25h 45m
2 stops
SEA3:05 pmSeattle/Tacoma Intl
$668
Air Canada
Jul 23
SEA3:00 pmSeattle/Tacoma Intl
20h 20m
2 stops
UVF2:20 pmCastries Hewanorra
Jul 28
UVF3:05 pmCastries Hewanorra
33h 02m
1 stop
SEA9:07 pmSeattle/Tacoma Intl
$821

American Airlines flights from Seattle to Saint Lucia

Our best American Airlines deals on Seattle to Saint Lucia flight tickets
American Airlines
Sep 1
SEA9:50 pmSeattle/Tacoma Intl
13h 25m
1 stop
UVF2:15 pmCastries Hewanorra
Sep 8
UVF3:09 pmCastries Hewanorra
21h 11m
2 stops
SEA9:20 amSeattle/Tacoma Intl
$709
American Airlines
Sep 1
SEA11:55 pmSeattle/Tacoma Intl
11h 20m
1 stop
UVF2:15 pmCastries Hewanorra
Sep 8
UVF3:15 pmCastries Hewanorra
27h 25m
1 stop
SEA3:40 pmSeattle/Tacoma Intl
$722
American Airlines
Sep 14
SEA5:31 pmSeattle/Tacoma Intl
17h 19m
2 stops
UVF1:50 pmCastries Hewanorra
Sep 21
UVF4:00 pmCastries Hewanorra
22h 46m
2 stops
SEA11:46 amSeattle/Tacoma Intl
$811

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 March 27, 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 - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 4/22

8:00 am-3:25 pm

1 stop28h 25m

Castries Hewanorra

Wed 4/29

4:20 pm-9:53 pm

1 stop32h 33m

$642

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 4/22

10:20 am-3:25 pm

2 stops26h 05m

Castries Hewanorra

Wed 4/29

4:20 pm-3:05 pm

2 stops25h 45m

$668

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 9/14

3:55 pm-2:23 pm

1 stop19h 28m

Castries Hewanorra

Wed 9/23

3:38 pm-10:05 am

1 stop21h 27m

$704
Quickest round-trip

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 9/1

9:50 pm-2:15 pm

1 stop13h 25m

Castries Hewanorra

Tue 9/8

3:09 pm-9:20 am

2 stops21h 11m

$709

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 9/1

11:55 pm-2:15 pm

1 stop11h 20m

Castries Hewanorra

Tue 9/8

3:15 pm-3:40 pm

1 stop27h 25m

$722

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 9/9

3:55 pm-2:23 pm

1 stop19h 28m

Castries Hewanorra

Wed 9/23

3:38 pm-10:05 am

1 stop21h 27m

$728

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 9/10

3:55 pm-2:23 pm

1 stop19h 28m

Castries Hewanorra

Wed 9/23

3:38 pm-10:05 am

1 stop21h 27m

$753

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 9/11

6:00 pm-1:31 pm

2 stops16h 31m

Castries Hewanorra

Sat 9/19

2:35 pm-9:35 am

2 stops22h 00m

$778

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 9/2

10:20 pm-3:15 pm

1 stop13h 55m

Castries Hewanorra

Tue 9/8

4:20 pm-10:24 pm

1 stop33h 04m

$803

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 9/14

5:31 pm-1:50 pm

2 stops17h 19m

Castries Hewanorra

Mon 9/21

4:00 pm-11:46 am

2 stops22h 46m

$811

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 airline that flies from Seattle/Tacoma Intl to Saint Lucia?

Delta, American Airlines, and JetBlue are the most popular carriers operating from Seattle/Tacoma Intl to Saint Lucia

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

11h 13m

Direct flights

None
The fastest flight from Seattle to Saint Lucia takes 11h 13m
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 $729Free CancellationRating
7.1
11,507 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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