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Cheap flights from Seattle to Castries from $283

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 11/17. 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
10:57 pm - 2:30 pmSEA-UVF
11h 33m1 stop
American Airlines Logo
5:10 pm - 11:56 amUVF-SEA
22h 46m1 stop
$501American Airlines
Find Deal
Sun, Jan 18 - Thu, Jan 29
American Airlines Logo
7:22 pm - 2:30 pmSEA-UVF
15h 08m2 stops
American Airlines Logo
3:35 pm - 9:36 amUVF-SEA
22h 01m2 stops
$506American Airlines
Find Deal
Sun, Jan 18 - Thu, Jan 29
Air Canada Logo
8:15 am - 3:25 pmSEA-UVF
28h 10m1 stop
Air Canada Logo
4:15 pm - 2:31 pmUVF-SEA
25h 16m2 stops
$514Air Canada
Find Deal
Sun, Oct 26 - Fri, Oct 31
American Airlines Logo
6:22 pm - 2:30 pmSEA-UVF
16h 08m2 stops
American Airlines Logo
4:50 pm - 10:41 amUVF-SEA
21h 51m2 stops
$536American Airlines
Find Deal
Sun, Jan 11 - Sun, Jan 18
Air Canada Logo
8:00 pm - 4:25 pmSEA-UVF
40h 25m2 stops
Air Canada Logo
5:15 pm - 10:16 pmUVF-SEA
33h 01m1 stop
$583Air Canada
Find Deal
Mon, Dec 1 - Wed, Dec 10
Air Canada Logo
8:15 am - 3:25 pmSEA-UVF
28h 10m1 stop
Air Canada Logo
4:15 pm - 2:31 pmUVF-SEA
25h 16m3 stops
$588Air Canada
Find Deal
Sun, Oct 26 - Fri, Oct 31
Delta Logo
3:20 pm - 3:04 pmSEA-UVF
19h 44m1 stop
Delta Logo
4:24 pm - 10:29 amUVF-SEA
22h 05m1 stop
$979Delta
Find Deal
Sat, Feb 14 - Mon, Feb 23
Multiple Airlines Logo
10:05 am - 2:50 pmSEA-UVF
24h 45m2 stops
Multiple Airlines Logo
5:15 pm - 5:15 pmUVF-SEA
28h 00m3 stops
$988Multiple Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 16
Multiple Airlines Logo
5:50 am - 2:50 pmSEA-UVF
29h 00m3 stops
Multiple Airlines Logo
5:15 pm - 5:15 pmUVF-SEA
28h 00m3 stops
$1,025Multiple Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 16
Delta Logo
3:20 pm - 3:04 pmSEA-UVF
19h 44m1 stop
Delta Logo
4:24 pm - 10:29 amUVF-SEA
22h 05m1 stop
$1,164Delta
Find Deal
Fri, Feb 13 - Mon, Feb 23

Delta flights from Seattle to Castries

Our best Delta deals on Seattle to Castries flight tickets
Delta
Feb 14
SEA3:20 pmSeattle/Tacoma Intl
19h 44m
1 stop
UVF3:04 pmCastries Hewanorra
Feb 23
UVF4:24 pmCastries Hewanorra
22h 05m
1 stop
SEA10:29 amSeattle/Tacoma Intl
$979
Find similar
Delta
Feb 13
SEA3:20 pmSeattle/Tacoma Intl
19h 44m
1 stop
UVF3:04 pmCastries Hewanorra
Feb 23
UVF4:24 pmCastries Hewanorra
22h 05m
1 stop
SEA10:29 amSeattle/Tacoma Intl
$1,164
Find similar
Delta
Dec 1
SEA11:00 pmSeattle/Tacoma Intl
12h 38m
1 stop
UVF3:38 pmCastries Hewanorra
Dec 10
UVF4:59 pmCastries Hewanorra
21h 19m
1 stop
SEA10:18 amSeattle/Tacoma Intl
$1,222
Find similar

Air Canada flights from Seattle to Castries

Our best Air Canada deals on Seattle to Castries flight tickets
Air Canada
Oct 26
SEA8:15 amSeattle/Tacoma Intl
28h 10m
1 stop
UVF3:25 pmCastries Hewanorra
Oct 31
UVF4:15 pmCastries Hewanorra
25h 16m
2 stops
SEA2:31 pmSeattle/Tacoma Intl
$514
Find similar
Air Canada
Dec 1
SEA8:00 pmSeattle/Tacoma Intl
40h 25m
2 stops
UVF4:25 pmCastries Hewanorra
Dec 10
UVF5:15 pmCastries Hewanorra
33h 01m
1 stop
SEA10:16 pmSeattle/Tacoma Intl
$583
Find similar
Air Canada
Oct 26
SEA8:15 amSeattle/Tacoma Intl
28h 10m
1 stop
UVF3:25 pmCastries Hewanorra
Oct 31
UVF4:15 pmCastries Hewanorra
25h 16m
3 stops
SEA2:31 pmSeattle/Tacoma Intl
$588
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 September 18, 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

10:57 pm-2:30 pm

1 stop11h 33m

Castries Hewanorra

Thu 1/29

5:10 pm-11:56 am

1 stop22h 46m

$501

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

7:22 pm-2:30 pm

2 stops15h 08m

Castries Hewanorra

Thu 1/29

3:35 pm-9:36 am

2 stops22h 01m

$506

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 10/26

8:15 am-3:25 pm

1 stop28h 10m

Castries Hewanorra

Fri 10/31

4:15 pm-2:31 pm

2 stops25h 16m

$514

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/11

6:22 pm-2:30 pm

2 stops16h 08m

Castries Hewanorra

Sun 1/18

4:50 pm-10:41 am

2 stops21h 51m

$536

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 12/1

8:00 pm-4:25 pm

2 stops40h 25m

Castries Hewanorra

Wed 12/10

5:15 pm-10:16 pm

1 stop33h 01m

$583

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 10/26

8:15 am-3:25 pm

1 stop28h 10m

Castries Hewanorra

Fri 10/31

4:15 pm-2:31 pm

3 stops25h 16m

$588

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 2/14

3:20 pm-3:04 pm

1 stop19h 44m

Castries Hewanorra

Mon 2/23

4:24 pm-10:29 am

1 stop22h 05m

$979

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 11/5

10:05 am-2:50 pm

2 stops24h 45m

Castries Hewanorra

Sun 11/16

5:15 pm-5:15 pm

3 stops28h 00m

$988

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 11/5

5:50 am-2:50 pm

3 stops29h 00m

Castries Hewanorra

Sun 11/16

5:15 pm-5:15 pm

3 stops28h 00m

$1,025

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 2/13

3:20 pm-3:04 pm

1 stop19h 44m

Castries Hewanorra

Mon 2/23

4:24 pm-10:29 am

1 stop22h 05m

$1,164

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 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

Direct flights

None
There are no direct flights from Seattle to Castries. There are no popular flight routes from Seattle to Castries.
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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 11h 11m 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 $675Free 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