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Cheap flights from Seattle to Castries from $322

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 11/7. 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

American Airlines Logo
1:56 pm - 2:25 pmSEA-UVF
20h 29m1 stop
American Airlines Logo
5:10 pm - 11:56 amUVF-SEA
22h 46m1 stop
$525American Airlines
Find Deal
Sun, Jan 18 - Thu, Jan 29
American Airlines Logo
1:56 pm - 2:25 pmSEA-UVF
20h 29m1 stop
American Airlines Logo
3:35 pm - 9:36 amUVF-SEA
22h 01m2 stops
$530American Airlines
Find Deal
Sun, Jan 18 - Thu, Jan 29
American Airlines Logo
10:08 pm - 3:50 pmSEA-UVF
13h 42m1 stop
American Airlines Logo
5:05 pm - 12:01 pmUVF-SEA
22h 56m1 stop
$634American Airlines
Find Deal
Mon, Dec 1 - Wed, Dec 10
American Airlines Logo
10:41 pm - 2:20 pmSEA-UVF
11h 39m1 stop
American Airlines Logo
4:20 pm - 9:29 amUVF-SEA
21h 09m2 stops
$639American Airlines
Find Deal
Sat, Dec 6 - Thu, Dec 11
Air Canada Logo
8:00 pm - 4:25 pmSEA-UVF
16h 25m2 stops
Air Canada Logo
5:15 pm - 9:56 pmUVF-SEA
32h 41m1 stop
$889Air Canada
Find Deal
Sun, Nov 23 - Sun, Nov 30
Air Canada Logo
8:00 pm - 4:25 pmSEA-UVF
16h 25m2 stops
Air Canada Logo
5:15 pm - 2:26 pmUVF-SEA
25h 11m2 stops
$948Air Canada
Find Deal
Sun, Nov 23 - Sun, Nov 30
Logo
5:50 am - 2:50 pmSEA-UVF
29h 00m2 stops
Logo
5:15 pm - 7:16 pmUVF-SEA
30h 01m2 stops
$1,153
Find Deal
Sat, Nov 22 - Sun, Nov 30
Logo
10:05 am - 2:50 pmSEA-UVF
24h 45m2 stops
Logo
5:15 pm - 9:56 pmUVF-SEA
32h 41m1 stop
$1,158
Find Deal
Sat, Nov 22 - Sun, Nov 30
WestJet Logo
3:10 pm - 2:50 pmSEA-UVF
43h 40m2 stops
WestJet Logo
3:40 pm - 2:20 pmUVF-SEA
50h 40m2 stops
$1,279WestJet
Find Deal
Fri, Nov 21 - Sun, Nov 30
United Airlines Logo
5:05 pm - 4:25 pmSEA-UVF
43h 20m2 stops
United Airlines Logo
1:52 pm - 9:07 pmUVF-SEA
35h 15m3 stops
$2,777United Airlines
Find Deal
Thu, Dec 18 - Sat, Jan 3

American Airlines flights from Seattle to Castries

Our best American Airlines deals on Seattle to Castries flight tickets
American Airlines
Jan 18
SEA1:56 pmSeattle/Tacoma Intl
20h 29m
1 stop
UVF2:25 pmCastries Hewanorra
Jan 29
UVF5:10 pmCastries Hewanorra
22h 46m
1 stop
SEA11:56 amSeattle/Tacoma Intl
$525
Find similar
American Airlines
Jan 18
SEA1:56 pmSeattle/Tacoma Intl
20h 29m
1 stop
UVF2:25 pmCastries Hewanorra
Jan 29
UVF3:35 pmCastries Hewanorra
22h 01m
2 stops
SEA9:36 amSeattle/Tacoma Intl
$530
Find similar
American Airlines
Dec 1
SEA10:08 pmSeattle/Tacoma Intl
13h 42m
1 stop
UVF3:50 pmCastries Hewanorra
Dec 10
UVF5:05 pmCastries Hewanorra
22h 56m
1 stop
SEA12:01 pmSeattle/Tacoma Intl
$634
Find similar

Air Canada flights from Seattle to Castries

Our best Air Canada deals on Seattle to Castries flight tickets
Air Canada
Nov 23
SEA8:00 pmSeattle/Tacoma Intl
16h 25m
2 stops
UVF4:25 pmCastries Hewanorra
Nov 30
UVF5:15 pmCastries Hewanorra
32h 41m
1 stop
SEA9:56 pmSeattle/Tacoma Intl
$889
Find similar
Air Canada
Nov 23
SEA8:00 pmSeattle/Tacoma Intl
16h 25m
2 stops
UVF4:25 pmCastries Hewanorra
Nov 30
UVF5:15 pmCastries Hewanorra
25h 11m
2 stops
SEA2:26 pmSeattle/Tacoma Intl
$948
Find similar
Air Canada
Nov 23
SEA8:15 amSeattle/Tacoma Intl
28h 10m
1 stop
UVF4:25 pmCastries Hewanorra
Nov 30
UVF5:15 pmCastries Hewanorra
32h 41m
1 stop
SEA9:56 pmSeattle/Tacoma Intl
$1,024
Find similar

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 August 3, 2025.
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

Sun 1/18

1:56 pm-2:25 pm

1 stop20h 29m

Castries Hewanorra

Thu 1/29

5:10 pm-11:56 am

1 stop22h 46m

$525

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

1:56 pm-2:25 pm

1 stop20h 29m

Castries Hewanorra

Thu 1/29

3:35 pm-9:36 am

2 stops22h 01m

$530

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 12/1

10:08 pm-3:50 pm

1 stop13h 42m

Castries Hewanorra

Wed 12/10

5:05 pm-12:01 pm

1 stop22h 56m

$634

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 12/6

10:41 pm-2:20 pm

1 stop11h 39m

Castries Hewanorra

Thu 12/11

4:20 pm-9:29 am

2 stops21h 09m

$639

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 11/23

8:00 pm-4:25 pm

2 stops16h 25m

Castries Hewanorra

Sun 11/30

5:15 pm-9:56 pm

1 stop32h 41m

$889

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 11/23

8:00 pm-4:25 pm

2 stops16h 25m

Castries Hewanorra

Sun 11/30

5:15 pm-2:26 pm

2 stops25h 11m

$948

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 11/22

5:50 am-2:50 pm

2 stops29h 00m

Castries Hewanorra

Sun 11/30

5:15 pm-7:16 pm

2 stops30h 01m

$1,153

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 11/22

10:05 am-2:50 pm

2 stops24h 45m

Castries Hewanorra

Sun 11/30

5:15 pm-9:56 pm

1 stop32h 41m

$1,158

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 11/21

3:10 pm-2:50 pm

2 stops43h 40m

Castries Hewanorra

Sun 11/30

3:40 pm-2:20 pm

2 stops50h 40m

$1,279

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 12/18

5:05 pm-4:25 pm

2 stops43h 20m

Castries Hewanorra

Sat 1/3

1:52 pm-9:07 pm

3 stops35h 15m

$2,777

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 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 typical price of a round-trip flight between Seattle and Castries?

What is the cheapest month to fly to Castries?

The month of September is, on average, the cheapest month to fly to Castries from Seattle, with most prices found around $613. The month of February is another great option to travel to Castries, with average flight prices from Seattle averaging around $695.

What is the cheapest day to depart on your flight to Castries?

The cheapest day to depart from Seattle to Castries is on a Monday when prices can be found for as low as $643. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,013. These prices are subject to change though, so be sure to set up a Price Alert for flights to Castries.

What is the cheapest time of day to depart on your flight to Castries?

According to our data, the cheapest time of day to fly to Castries is in the afternoon. momondo users have found flights departing from Seattle to Castries in the afternoon for as low as $597. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Castries are more costly in the evening, with an average ticket price of $825. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

Best Price Found

$322

Fastest flight time

10h 12m

Direct flights

None

Airports in Castries

1 airport
The best one-way flight to Castries from Seattle in the past 72 hours is $322. The best round-trip flight deal from Seattle to Castries found on momondo in the last 72 hours is $525.
The fastest flight from Seattle to Castries takes 10h 12m
There are no direct flights from Seattle to Castries. Popular non-direct route for this connection is Seattle/Tacoma Intl Airport - Castries Hewanorra Airport.
There is 1 airport near Castries: Castries Hewanorra (UVF)
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  • 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 10h 12m 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 $613Free CancellationRating
7.2
10,000 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