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Castries

$464+ Cheap flights from Seattle (SEA) to Castries (UVF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — UVF
Oct 23 — Oct 301
Thu 10/23
Thu 10/30
1 adult, Economy
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Cheap flight deals from Seattle to Castries

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Castries (UVF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 23, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$501
(American Airlines)

One-way from

$464
(Mytrip)

Popular in

June

Cheapest in

September

Average price

$613
Provider with most accurate pricing for Seattle/Tacoma Intl-Castries Hewanorra flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Castries Hewanorra flights.
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From Seattle/Tacoma Intl to Castries Hewanorra
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One-way flight from Seattle/Tacoma Intl to Castries Hewanorra
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Highest demand for flights based on searches. 22% potential increase in price ($276 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($67 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Seattle to Castries

Cheapest flights from Seattle to Castries
Explore the most affordable flight options available from Seattle to Castries. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2025.

This American Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/248:49 pmSEA - UVF
1 stop14h 07mAmerican Airlines
Thu 10/304:00 pmUVF - SEA
2 stops21h 54mAmerican Airlines
Deal found 9/21$506
This Air Canada deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:00 pmSEA - UVF
2 stops40h 25mAir Canada
Wed 12/105:15 pmUVF - SEA
2 stops44h 16mAir Canada
Deal found 9/21$580
This American Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/710:07 pmSEA - UVF
2 stops13h 46mAmerican Airlines
Mon 12/154:53 pmUVF - SEA
2 stops22h 44mAmerican Airlines
Deal found 9/21$627
This Booking.com deal was found by Cheapflights users on 9/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/78:00 pmSEA - UVF
2 stops40h 25mAir Canada
Fri 11/145:15 pmUVF - SEA
1 stop33h 01mAir Canada
Deal found 9/23$639
This Mytrip deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/263:40 pmSEA - UVF
3 stops20h 45mMultiple Airlines
Thu 10/302:40 pmUVF - SEA
2 stops26h 40mMultiple Airlines
Deal found 9/22$660
This Mytrip deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/247:15 pmSEA - UVF
2 stops41h 10mMultiple Airlines
Thu 10/302:40 pmUVF - SEA
3 stops26h 51mMultiple Airlines
Deal found 9/21$724
This American Airlines deal was found by Cheapflights users on 9/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/201:53 pmSEA - UVF
1 stop21h 07mAmerican Airlines
Tue 11/252:19 pmUVF - SEA
1 stop13h 07mAmerican Airlines
Deal found 9/22$769
This Mytrip deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/78:10 amSEA - UVF
1 stop28h 15mMultiple Airlines
Tue 12/163:40 pmUVF - SEA
2 stops26h 40mMultiple Airlines
Deal found 9/21$774
This American Airlines deal was found by Cheapflights users on 9/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/510:08 pmSEA - UVF
1 stop11h 11mAmerican Airlines
Wed 11/124:52 pmUVF - SEA
2 stops21h 33mAmerican Airlines
Deal found 9/21$847

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 23, 2025.
Use the filters below to find and compare flights from Seattle to Castries that are best for you.

Fly from

Seattle

Fly to

Castries

Route

Depart

Return

Price

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

10:57 pm-3:50 pm

1 stop12h 53m

Castries Hewanorra

Thu 1/29

5:10 pm-11:56 am

1 stop22h 46m

$501

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 10/24

8:49 pm-1:56 pm

1 stop14h 07m

Castries Hewanorra

Thu 10/30

4:00 pm-10:54 am

2 stops21h 54m

$506

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 10/26

8:49 pm-3:00 pm

1 stop15h 11m

Castries Hewanorra

Thu 10/30

4:00 pm-11:30 am

2 stops22h 30m

$506

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

$580

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 12/15

6:19 pm-4:25 pm

3 stops42h 06m

$464

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 11/20

1:53 pm-3:00 pm

1 stop21h 07m

$488

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 12/14

10:08 pm-3:53 pm

1 stop13h 45m

$528

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 12/14

3:10 pm-2:50 pm

3 stops43h 40m

$534

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 12/15

3:40 pm-4:25 pm

2 stops44h 45m

$576

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 11/20

7:13 pm-4:25 pm

2 stops41h 12m

$578

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/21

Showing 1-10 of 11 results
1
2

Compare providers for flights from Seattle to Castries

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Castries in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Castries flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Castries flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Castries flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Castries flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Castries flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Castries

Have a flexible travel schedule? Discover the best time to fly to Castries from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Castries

What is the cheapest month to book a flight from Seattle to Castries?

Currently, January is the cheapest month in which you can book a flight from Seattle to Castries (average of $556). Flying from Seattle to Castries in December is currently the most expensive (average of $730). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to UVF?

Find hourly flight availability from Seattle to Castries. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 23, 2025.

It’s typically best to fly out from Seattle to Castries at noon. Doing so could potentially save you 28% on the flight price compared to flying in the afternoon, which is usually more expensive.

Reviews of airlines servicing Castries

Get insights into the airlines that provide service to Castries. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Castries. Reviews last updated September 23, 2025.
See what other customers who have flown with American Airlines from Seattle to Castries have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Food

6.4

Overall

7.2

Boarding

7.5

Crew

8.0

Entertainment

6.9

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Food

6.4

Overall

7.2

Boarding

7.5

Crew

8.0

Entertainment

6.9

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Jeremy,Sep 2025

SAN - PHL

Terrible. Bad customer service and unacceptable delay on the tarmac

Related info for your journey

Find useful and relevant information for your journey from Seattle to Castries. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Castries?

    Airlines like American Airlines fly from Seattle to Castries in about 14h 07m. The time it takes to get you to your destination can typically vary by up to . The distance between Seattle and Castries is about 4189 mi.

  • What is the cheapest airline to fly from Seattle to Castries round-trip?

    American Airlines, at $675, was found to be the cheapest airline from Seattle to Castries.. Users have found that American Airlines is 27% cheaper than the other options available to this destination.

  • Can I find deals for flights from Seattle to Castries that include hotel bookings?

    Yes. In addition to deals on Seattle to Castries flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Castries?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Castries.

  • Can I find deals for business class flights from Seattle to Castries?

    Yes. Cheapflights offers flight deals from Seattle to Castries by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Castries?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Castries (average of $556). Flying from Seattle to Castries in December is currently the most expensive (average of $730). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Castries

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Castries flights

Top airline flying from Seattle to Castries

Discover the top airline that operate flights from Seattle to Castries. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$675Average$853FlexibilityNo cancel feeOn-time71%

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