HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Castries

$491+ Cheap flights from Seattle (SEA) to Castries (UVF)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — UVF
Dec 6 — Dec 131
Sat 12/6
Sat 12/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Castries with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 November 6, 2025.

This Air Canada deal was found by Cheapflights users on 11/6. 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 20mAir Canada
Wed 12/105:15 pmUVF - SEA
1 stop33h 01mAir Canada
Deal found 11/6$617
This Delta deal was found by Cheapflights users on 11/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/13:42 pmSEA - UVF
1 stop19h 54mDelta
Wed 12/104:56 pmUVF - SEA
1 stop21h 23mDelta
Deal found 11/5$1,153
This American Airlines deal was found by Cheapflights users on 11/6. 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 12/1812:43 pmSEA - UVF
1 stop20h 21mAmerican Airlines
Mon 12/294:54 pmUVF - SEA
1 stop22h 36mAmerican Airlines
Deal found 11/6$1,537
This Kiwi.com deal was found by Cheapflights users on 11/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:45 pmSEA - UVF
2 stops17h 05mMultiple Airlines
Sun 12/283:40 pmUVF - SEA
1 stop31h 31mMultiple Airlines
Deal found 11/5$1,622
This American Airlines deal was found by Cheapflights users on 11/5. 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 12/249:20 pmSEA - UVF
1 stop13h 24mAmerican Airlines
Sun 12/284:54 pmUVF - SEA
1 stop22h 36mAmerican Airlines
Deal found 11/5$1,820
This American Airlines deal was found by Cheapflights users on 11/5. 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.
Sat 12/2010:06 pmSEA - UVF
1 stop10h 58mAmerican Airlines
Sat 12/274:54 pmUVF - SEA
1 stop22h 36mAmerican Airlines
Deal found 11/5$2,065

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 November 6, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$491
(Delta)

Popular in

December

Cheapest in

September

Average price

$830
Provider with most accurate pricing for Seattle/Tacoma Intl-Castries Hewanorra flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Castries Hewanorra flights.
Search Deals
From Seattle/Tacoma Intl to Castries Hewanorra
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($114 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($77 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 6, 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

4:05 pm-3:05 pm

1 stop19h 00m

Castries Hewanorra

Thu 1/22

4:25 pm-10:07 am

1 stop21h 42m

$491

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

4:05 pm-3:05 pm

1 stop19h 00m

Castries Hewanorra

Thu 1/29

4:25 pm-10:07 am

1 stop21h 42m

$491

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

9:45 pm-3:03 pm

1 stop13h 18m

Castries Hewanorra

Thu 1/29

5:02 pm-11:01 am

2 stops21h 59m

$496

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/18

9:45 pm-4:02 pm

2 stops14h 17m

Castries Hewanorra

Thu 1/22

2:46 pm-9:37 am

2 stops22h 51m

$496

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sun 1/11

9:45 pm-4:02 pm

2 stops14h 17m

Castries Hewanorra

Sat 1/17

5:02 pm-11:45 am

2 stops22h 43m

$521

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Mon 12/1

8:00 pm-4:20 pm

2 stops40h 20m

Castries Hewanorra

Wed 12/10

5:15 pm-10:16 pm

1 stop33h 01m

$617

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Fri 1/16

5:00 pm-2:10 pm

2 stops17h 10m

Castries Hewanorra

Sat 1/24

5:02 pm-11:01 am

2 stops21h 59m

$672

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/5

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Castries flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $434). Flying from Seattle to Castries in June is currently the most expensive (average of $1,408). 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 November 6, 2025.

It’s typically best to fly out from Seattle to Castries in the afternoon. Doing so could potentially save you 34% on the flight price compared to flying at noon, 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 November 6, 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
11,040 reviews

Food

6.4

Comfort

7.2

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.
American Airlines
7.2
Good
11,040 reviews
American Airlines
7.2
Good
11,040 reviews

Food

6.4

Comfort

7.2

Boarding

7.5

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
8.0
Excellent

Monica,Nov 2025

JAC - DFW

At least there was an option of entertainment on this flight.

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 Delta and American Airlines fly from Seattle to Castries in about 13h 18m. The time it takes to get you to your destination can typically vary by up to 5h 42m. The distance between Seattle and Castries is about 4189 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    American Airlines, at $615, was found to be the cheapest airline from Seattle to Castries.. Users have found that American Airlines is 38% 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 $434). Flying from Seattle to Castries in June is currently the most expensive (average of $1,408). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 November 6, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$615Average$886FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.