SEA - UVF

$525 Find Cheap Flights from Seattle to Castries

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Castries departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Castries

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Castries, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Castries, as well as popular online travel agencies
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Flights Deals

Cheap Flights from Seattle to Castries (SEA-UVF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Castries that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Castries

Mon, Aug 25 - Tue, Sep 2
Delta Logo
11:35 pm - 2:15 pmSEA-UVF
11h 40m1 stop
Delta Logo
3:35 pm - 10:27 amUVF-SEA
21h 52m1 stop
$525Delta
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Sun, Jan 18 - Thu, Jan 29
American Airlines Logo
10:57 pm - 2:30 pmSEA-UVF
11h 33m1 stop
American Airlines Logo
5:10 pm - 10:41 amUVF-SEA
21h 31m2 stops
$530American Airlines
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Wed, Sep 17 - Tue, Sep 23
Air Canada Logo
7:15 pm - 2:15 pmSEA-UVF
40h 00m2 stops
Air Canada Logo
3:10 pm - 7:31 pmUVF-SEA
31h 21m2 stops
$538Air Canada
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Thu, Sep 18 - Tue, Sep 23
Air Canada Logo
10:00 am - 2:15 pmSEA-UVF
25h 15m2 stops
Air Canada Logo
3:10 pm - 10:59 amUVF-SEA
22h 49m1 stop
$545Air Canada
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Sat, Sep 13 - Sat, Sep 20
JetBlue Logo
11:59 pm - 2:15 pmSEA-UVF
11h 16m1 stop
JetBlue Logo
2:06 pm - 10:20 pmUVF-SEA
35h 14m1 stop
$584JetBlue
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Mon, Oct 6 - Fri, Oct 10
JetBlue Logo
11:40 pm - 1:45 pmSEA-UVF
11h 05m1 stop
JetBlue Logo
3:05 pm - 10:10 pmUVF-SEA
34h 05m1 stop
$590JetBlue
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Mon, Aug 25 - Tue, Sep 2
American Airlines Logo
6:30 am - 2:25 pmSEA-UVF
28h 55m2 stops
American Airlines Logo
3:35 pm - 1:59 pmUVF-SEA
25h 24m2 stops
$622American Airlines
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Mon, Dec 1 - Wed, Dec 10
American Airlines Logo
10:08 pm - 1:21 pmSEA-UVF
11h 13m1 stop
American Airlines Logo
3:05 pm - 11:22 pmUVF-SEA
12h 17m1 stop
$634American Airlines
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Fri, Sep 12 - Fri, Sep 19
Logo
1:15 pm - 1:44 pmSEA-UVF
45h 29m3 stops
Logo
3:10 pm - 2:16 pmUVF-SEA
26h 06m2 stops
$672
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Fri, Sep 12 - Fri, Sep 19
Logo
1:15 pm - 1:44 pmSEA-UVF
45h 29m3 stops
Logo
3:10 pm - 9:21 amUVF-SEA
21h 11m3 stops
$683
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Castries flights

Get data-powered insights and trends into flights from Seattle to Castries to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Seattle to Castries?

What is the cheapest month to fly from Seattle to Castries?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Castries, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Castries is September, where tickets cost $613 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $1,663 and $1,158 respectively.

Find deals

Good to know

Low seasonSeptember
Cheapest flight$525
Best time to beat the crowds with an average 35% drop in price.
Most popular time to fly and prices are also 26% lower on average.
Flight from Seattle to Castries

When to book flights from Seattle to Castries

Are your dates flexible? Find out the best times to travel from Seattle to Castries based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Castries

  • What is the cheapest flight from Seattle to Castries?

    In the last 3 days, the lowest price for a flight from Seattle to Castries was $525 for a round-trip ticket.

  • Do I need a passport to fly between Seattle and Castries?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Seattle and on arrival in Castries.

  • Which aircraft models fly most regularly from Seattle to Castries?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Castries?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Seattle and Castries, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Seattle to Castries?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Castries.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Castries?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Castries from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Castries?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Castries with an airline and back to Seattle with another airline. Booking your flights between Seattle and UVF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Castries?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Castries from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Seattle to Castries

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Castries. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Castries? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 10000 reviews
7.5Boarding
6.9Entertainment
8.0Crew
7.2Comfort
6.5Food
Airline reviews

Very poor delay in dfw was really bad n long

2.0 Mediocredavix, Jul 2025DFW - MKE
Read more American Airlines reviews

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

The plane was broken so we had to change planes.

The flight got delayed 2.5 hrs due to a maintenance issue that cause a domino effect. American should have spare planes for when something like this happens.

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

Information on your arrival and departure airports

Seattle (SEA)
Castries (UVF)

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