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Cheap flights from Seattle to Castries from $290

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 7/16. 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 Castries

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
9:35 pm - 2:20 pm
SEA
-
UVF
13h 45m
1 stop
American Airlines Logo
3:20 pm - 9:27 am
UVF
-
SEA
21h 07m
2 stops
$645American Airlines
Mon, Jul 6 - Mon, Jul 13
American Airlines Logo
8:21 pm - 1:54 pm
SEA
-
UVF
14h 33m
1 stop
American Airlines Logo
2:54 pm - 12:20 am
UVF
-
SEA
12h 26m
1 stop
$684American Airlines
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
8:45 pm - 2:20 pm
SEA
-
UVF
14h 35m
2 stops
American Airlines Logo
3:20 pm - 9:27 am
UVF
-
SEA
21h 07m
2 stops
$689American Airlines
Mon, Jul 6 - Mon, Jul 13
American Airlines Logo
5:37 pm - 1:50 pm
SEA
-
UVF
17h 13m
2 stops
American Airlines Logo
2:50 pm - 12:07 am
UVF
-
SEA
12h 17m
1 stop
$721American Airlines
Fri, Jul 3 - Tue, Jul 28
Air Canada Logo
7:45 am - 4:25 pm
SEA
-
UVF
28h 40m
1 stop
Air Canada Logo
5:25 pm - 8:54 pm
UVF
-
SEA
31h 29m
1 stop
$730Air Canada
Sun, Nov 1 - Thu, Nov 5
Air Canada Logo
7:45 am - 4:25 pm
SEA
-
UVF
28h 40m
1 stop
Air Canada Logo
5:25 pm - 6:22 pm
UVF
-
SEA
28h 57m
2 stops
$734Air Canada
Sun, Nov 1 - Thu, Nov 5
American Airlines Logo
9:35 pm - 2:20 pm
SEA
-
UVF
13h 45m
1 stop
American Airlines Logo
3:20 pm - 9:47 am
UVF
-
SEA
21h 27m
1 stop
$762American Airlines
Mon, Jul 6 - Mon, Jul 13
American Airlines Logo
10:00 pm - 1:54 pm
SEA
-
UVF
12h 54m
2 stops
American Airlines Logo
2:54 pm - 9:29 am
UVF
-
SEA
21h 35m
2 stops
$767American Airlines
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
7:10 am - 2:20 pm
SEA
-
UVF
28h 10m
1 stop
American Airlines Logo
2:50 pm - 12:07 am
UVF
-
SEA
12h 17m
1 stop
$779American Airlines
Sat, Jul 4 - Sat, Jul 11
American Airlines Logo
5:37 pm - 1:50 pm
SEA
-
UVF
17h 13m
2 stops
American Airlines Logo
3:20 pm - 9:27 am
UVF
-
SEA
21h 07m
2 stops
$801American Airlines
Fri, Jul 3 - Tue, Jul 28

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Air Canada flights from Seattle to Castries

Our best Air Canada deals on Seattle to Castries flight tickets
Air Canada
Nov 1
SEA7:45 amSeattle/Tacoma Intl
28h 40m
1 stop
UVF4:25 pmCastries Hewanorra
Nov 5
UVF5:25 pmCastries Hewanorra
31h 29m
1 stop
SEA8:54 pmSeattle/Tacoma Intl
$730
Air Canada
Nov 1
SEA7:45 amSeattle/Tacoma Intl
28h 40m
1 stop
UVF4:25 pmCastries Hewanorra
Nov 5
UVF5:25 pmCastries Hewanorra
28h 57m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
$734
Air Canada
Nov 20
SEA7:05 pmSeattle/Tacoma Intl
41h 20m
2 stops
UVF4:25 pmCastries Hewanorra
Nov 27
UVF5:25 pmCastries Hewanorra
31h 29m
1 stop
SEA8:54 pmSeattle/Tacoma Intl
$864

JetBlue flights from Seattle to Castries

Our best JetBlue deals on Seattle to Castries flight tickets
JetBlue
Jul 3
SEA10:28 pmSeattle/Tacoma Intl
12h 03m
1 stop
UVF1:31 pmCastries Hewanorra
Jul 8
UVF4:45 pmCastries Hewanorra
31h 12m
1 stop
SEA8:57 pmSeattle/Tacoma Intl
$882
JetBlue
Sep 2
SEA10:19 pmSeattle/Tacoma Intl
13h 47m
1 stop
UVF3:06 pmCastries Hewanorra
Sep 6
UVF4:33 pmCastries Hewanorra
31h 31m
1 stop
SEA9:04 pmSeattle/Tacoma Intl
$917
JetBlue
Aug 16
SEA10:19 pmSeattle/Tacoma Intl
13h 47m
1 stop
UVF3:06 pmCastries Hewanorra
Aug 19
UVF1:59 pmCastries Hewanorra
34h 05m
1 stop
SEA9:04 pmSeattle/Tacoma Intl
$953

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 June 9, 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

Cheapest round-trip

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 7/6

9:35 pm-2:20 pm

1 stop13h 45m

Castries Hewanorra

Mon 7/13

3:20 pm-9:27 am

2 stops21h 07m

$645
Quickest round-trip

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 8/18

8:21 pm-1:54 pm

1 stop14h 33m

Castries Hewanorra

Tue 8/25

2:54 pm-12:20 am

1 stop12h 26m

$684

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 7/6

8:45 pm-2:20 pm

2 stops14h 35m

Castries Hewanorra

Mon 7/13

3:20 pm-9:27 am

2 stops21h 07m

$689

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 7/3

5:37 pm-1:50 pm

2 stops17h 13m

Castries Hewanorra

Tue 7/28

2:50 pm-12:07 am

1 stop12h 17m

$721

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 11/1

7:45 am-4:25 pm

1 stop28h 40m

Castries Hewanorra

Thu 11/5

5:25 pm-8:54 pm

1 stop31h 29m

$730

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 11/1

7:45 am-4:25 pm

1 stop28h 40m

Castries Hewanorra

Thu 11/5

5:25 pm-6:22 pm

2 stops28h 57m

$734

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 7/6

9:35 pm-2:20 pm

1 stop13h 45m

Castries Hewanorra

Mon 7/13

3:20 pm-9:47 am

1 stop21h 27m

$762

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Tue 8/18

10:00 pm-1:54 pm

2 stops12h 54m

Castries Hewanorra

Tue 8/25

2:54 pm-9:29 am

2 stops21h 35m

$767

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 7/4

7:10 am-2:20 pm

1 stop28h 10m

Castries Hewanorra

Sat 7/11

2:50 pm-12:07 am

1 stop12h 17m

$779

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 7/3

5:37 pm-1:50 pm

2 stops17h 13m

Castries Hewanorra

Tue 7/28

3:20 pm-9:27 am

2 stops21h 07m

$801

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 February is, on average, the cheapest month to fly to Castries from Seattle, with most prices found around $0. The month of October is another great option to travel to Castries, with average flight prices from Seattle averaging around $727.

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

12h 03m

Direct flights

None
The fastest flight from Seattle to Castries takes 12h 03m
There are no direct flights from Seattle to Castries. There are no popular flight routes from Seattle to Castries.
Search flight deals

Frequently asked questions about flying from Seattle to Castries

  • 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 12h 03m 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
7.1
11,640 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