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Cheap flights from Seattle to Castries from $275

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 Castries departing on 6/3. 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 Castries

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
10:16 pm - 2:58 pm
SEA
-
UVF
13h 42m
1 stop
American Airlines Logo
3:58 pm - 11:27 am
UVF
-
SEA
22h 29m
2 stops
$517American Airlines
Mon, Mar 9 - Mon, Mar 16
Delta Logo
3:59 pm - 1:58 pm
SEA
-
UVF
18h 59m
1 stop
Delta Logo
3:18 pm - 10:01 am
UVF
-
SEA
21h 43m
1 stop
$563Delta
Mon, Mar 9 - Wed, Mar 18
Air Canada Logo
8:00 pm - 3:25 pm
SEA
-
UVF
16h 25m
2 stops
Air Canada Logo
4:15 pm - 3:01 pm
UVF
-
SEA
25h 46m
2 stops
$592Air Canada
Tue, Mar 10 - Wed, Mar 18
Air Canada Logo
8:10 am - 3:25 pm
SEA
-
UVF
28h 15m
1 stop
Air Canada Logo
4:15 pm - 10:16 pm
UVF
-
SEA
33h 01m
1 stop
$594Air Canada
Tue, Mar 10 - Wed, Mar 18
Air Canada Logo
8:00 pm - 3:25 pm
SEA
-
UVF
40h 25m
2 stops
Air Canada Logo
4:15 pm - 3:01 pm
UVF
-
SEA
25h 46m
2 stops
$600Air Canada
Mon, Mar 9 - Wed, Mar 18
Air Canada Logo
3:40 pm - 3:25 pm
SEA
-
UVF
20h 45m
2 stops
Air Canada Logo
4:15 pm - 3:01 pm
UVF
-
SEA
25h 46m
2 stops
$618Air Canada
Tue, Mar 10 - Mon, Mar 16
Air Canada Logo
3:00 pm - 2:20 pm
SEA
-
UVF
44h 20m
2 stops
Air Canada Logo
3:05 pm - 9:17 am
UVF
-
SEA
21h 12m
2 stops
$656Air Canada
Sun, Jun 21 - Tue, Jun 30
American Airlines Logo
10:16 pm - 2:58 pm
SEA
-
UVF
13h 42m
1 stop
American Airlines Logo
3:18 pm - 11:27 am
UVF
-
SEA
23h 09m
1 stop
$663American Airlines
Mon, Mar 9 - Mon, Mar 16
Air Canada Logo
8:10 am - 3:25 pm
SEA
-
UVF
28h 15m
1 stop
Air Canada Logo
4:15 pm - 10:06 pm
UVF
-
SEA
32h 51m
2 stops
$667Air Canada
Sun, Mar 8 - Wed, Mar 18
Air Canada Logo
8:10 am - 3:25 pm
SEA
-
UVF
28h 15m
1 stop
Air Canada Logo
4:15 pm - 3:01 pm
UVF
-
SEA
25h 46m
2 stops
$701Air Canada
Wed, Mar 11 - Wed, Mar 18

American Airlines flights from Seattle to Castries

Our best American Airlines deals on Seattle to Castries flight tickets
American Airlines
Mar 9
SEA10:16 pmSeattle/Tacoma Intl
13h 42m
1 stop
UVF2:58 pmCastries Hewanorra
Mar 16
UVF3:58 pmCastries Hewanorra
22h 29m
2 stops
SEA11:27 amSeattle/Tacoma Intl
$517
American Airlines
Mar 9
SEA10:16 pmSeattle/Tacoma Intl
13h 42m
1 stop
UVF2:58 pmCastries Hewanorra
Mar 16
UVF3:18 pmCastries Hewanorra
23h 09m
1 stop
SEA11:27 amSeattle/Tacoma Intl
$663
American Airlines
May 27
SEA9:03 pmSeattle/Tacoma Intl
15h 01m
1 stop
UVF3:04 pmCastries Hewanorra
Jun 3
UVF3:10 pmCastries Hewanorra
21h 25m
2 stops
SEA9:35 amSeattle/Tacoma Intl
$794

Delta flights from Seattle to Castries

Our best Delta deals on Seattle to Castries flight tickets
Delta
Mar 9
SEA3:59 pmSeattle/Tacoma Intl
18h 59m
1 stop
UVF1:58 pmCastries Hewanorra
Mar 18
UVF3:18 pmCastries Hewanorra
21h 43m
1 stop
SEA10:01 amSeattle/Tacoma Intl
$563
Delta
Feb 6
SEA4:05 pmSeattle/Tacoma Intl
19h 00m
1 stop
UVF3:05 pmCastries Hewanorra
Feb 10
UVF4:25 pmCastries Hewanorra
21h 42m
1 stop
SEA10:07 amSeattle/Tacoma Intl
$734
Delta
Mar 8
SEA9:45 pmSeattle/Tacoma Intl
13h 13m
1 stop
UVF1:58 pmCastries Hewanorra
Mar 17
UVF3:18 pmCastries Hewanorra
21h 43m
1 stop
SEA10:01 amSeattle/Tacoma Intl
$798

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Castries 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 January 24, 2026.
Use the filters below to find and compare flights from Seattle to Castries that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 3/9

10:16 pm-2:58 pm

1 stop13h 42m

Castries Hewanorra

Mon 3/16

3:58 pm-11:27 am

2 stops22h 29m

$517

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 3/9

3:59 pm-1:58 pm

1 stop18h 59m

Castries Hewanorra

Wed 3/18

3:18 pm-10:01 am

1 stop21h 43m

$563

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 3/10

8:00 pm-3:25 pm

2 stops16h 25m

Castries Hewanorra

Wed 3/18

4:15 pm-3:01 pm

2 stops25h 46m

$592

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 3/10

8:10 am-3:25 pm

1 stop28h 15m

Castries Hewanorra

Wed 3/18

4:15 pm-10:16 pm

1 stop33h 01m

$594

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 3/9

8:00 pm-3:25 pm

2 stops40h 25m

Castries Hewanorra

Wed 3/18

4:15 pm-3:01 pm

2 stops25h 46m

$600

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 3/10

3:40 pm-3:25 pm

2 stops20h 45m

Castries Hewanorra

Mon 3/16

4:15 pm-3:01 pm

2 stops25h 46m

$618

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 6/21

3:00 pm-2:20 pm

2 stops44h 20m

Castries Hewanorra

Tue 6/30

3:05 pm-9:17 am

2 stops21h 12m

$656

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 3/9

10:16 pm-2:58 pm

1 stop13h 42m

Castries Hewanorra

Mon 3/16

3:18 pm-11:27 am

1 stop23h 09m

$663

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 3/8

8:10 am-3:25 pm

1 stop28h 15m

Castries Hewanorra

Wed 3/18

4:15 pm-10:06 pm

2 stops32h 51m

$667

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 3/11

8:10 am-3:25 pm

1 stop28h 15m

Castries Hewanorra

Wed 3/18

4:15 pm-3:01 pm

2 stops25h 46m

$701

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 14 resultsSorted by cheapest first
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See travel insights to Castries from

How to get the cheapest flight ticket from Seattle to Castries

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 Castries Hewanorra?

Air Canada, WestJet, and JetBlue are the most popular carriers operating from Seattle/Tacoma Intl to Castries Hewanorra

When to book flights from Seattle to Castries

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Castries according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Castries (SEA to UVF) flight deals and tips

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

Fastest flight time

18h 59m

Direct flights

None
The fastest flight from Seattle to Castries takes 18h 59m
There are no direct flights from Seattle to Castries. There are no popular flight routes from Seattle to Castries.
Search flight deals

  • How far is Seattle/Tacoma Intl to Castries Hewanorra by plane?

    The distance between Seattle/Tacoma Intl and Castries Hewanorra is about 4177.3 mi. Typically, this will take 18h 59m by plane in normal conditions.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Castries Hewanorra Airport.

  • What documentation or ID do you need to fly to Castries Hewanorra Airport?

    The required travel and health documents for your Castries Hewanorra Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Castries Hewanorra Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Seattle to Castries?

Best airlines flying from Seattle to Castries

Compare and see reviews for airlines that fly from Seattle to Castries with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $668Free CancellationRating
7.2
11,197 reviews
Search American Airlines flights

Traveling to a place near Castries?

Book flights to Castries if you plan to visit one of these locations
Vieux Fort

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Castries. Millions of users trust and use momondo every year so you are in good hands.

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

momondo does allow users to show only those flights to Castries from Seattle which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Seattle to Castries?

momondo provides multiple filters to help you find the best flight to Castries 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 Castries right now. Can momondo alert me if prices change?

Price alerts on flights to Castries from Seattle are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Find better results for your trip to Saint Lucia

Airports servicing Saint Lucia

Castries George F. L. Charle Airport