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Castries

$250+ 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 6/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — UVF
Apr 29 — May 61
Tue 4/29
Tue 5/6
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 April 24, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$538
(Gotogate)

One-way from

$250
(Trip.com)

Popular in

October

Cheapest in

September

Average price

$900
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. 7% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($57 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 24, 2025.

This Gotogate deal was found by Cheapflights users on 4/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/122:55 pmSEA - UVF
2 stops20h 20mAir Canada
Fri 6/203:10 pmUVF - SEA
2 stops24h 51mAir Canada
Deal found 4/23$538
This Mytrip deal was found by Cheapflights users on 4/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/122:55 pmSEA - UVF
2 stops20h 20mMultiple Airlines
Fri 6/203:10 pmUVF - SEA
3 stops25h 59mMultiple Airlines
Deal found 4/23$681
This American Airlines deal was found by Cheapflights users on 4/24. 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.
Mon 12/111:10 pmSEA - UVF
1 stop9h 50mAmerican Airlines
Wed 12/105:05 pmUVF - SEA
1 stop22h 56mAmerican Airlines
Deal found 4/24$733
This Justfly.com deal was found by Cheapflights users on 4/23. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/237:35 pmSEA - UVF
2 stops15h 10mWestJet
Thu 7/312:35 pmUVF - SEA
2 stops32h 53mWestJet
Deal found 4/23$743
This United Airlines deal was found by Cheapflights users on 4/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/2610:26 pmSEA - UVF
1 stop10h 41mUnited Airlines
Sat 1/31:52 pmUVF - SEA
2 stops24h 07mUnited Airlines
Deal found 4/23$2,036

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 April 24, 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

Thu 6/12

2:55 pm-2:15 pm

2 stops20h 20m

Castries Hewanorra

Fri 6/20

3:10 pm-1:01 pm

2 stops24h 51m

$538

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 6/12

2:55 pm-2:15 pm

2 stops20h 20m

Castries Hewanorra

Fri 6/20

3:10 pm-2:09 pm

3 stops25h 59m

$681

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Wed 7/23

7:35 pm-1:45 pm

2 stops15h 10m

Castries Hewanorra

Thu 7/31

2:35 pm-8:28 pm

2 stops32h 53m

$743

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Thu 9/18

11:00 pm-1:43 pm

1 stop11h 43m

Castries Hewanorra

Mon 9/22

3:34 pm-12:33 am

1 stop11h 59m

$783

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 6/7

7:05 am-1:45 pm

2 stops27h 40m

$309

SeattleCastries

SEA - UVF

SEAUVF

Seattle/Tacoma Intl

Sat 6/7

10:40 pm-1:49 pm

1 stop12h 09m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Castries flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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 April 24, 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 April 24, 2025.
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
JetBlue
7.3
Good
2,924 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
WestJet
7.2
Good
2,816 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,192 reviews
Delta
8.0
Very good
7,920 reviews

Crew

8.5

Comfort

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines flying from Seattle to Castries round-trip?

    Air Canada, at $538, was found to be the cheapest airline from Seattle to Castries. An alternate airline flying to your destination would be American Airlines. Users have found that Air Canada is 39% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Seattle to Castries one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as $250. However, be on the lookout for offers from JetBlue and Delta, as they are both options that can get you from Seattle to Castries for a low price.

  • 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

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Alternative routes for Seattle to Castries

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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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$529Average$784FlexibilityNo cancel feeOn-time71%

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