C$608 Cheap Flights from Seattle / Tacoma International (SEA) to St Lucia Hewanorra (UVF)

Compare Seattle / Tacoma International to St Lucia Hewanorra flight deals

Find the cheapest month or even day of the year to fly to St Lucia Hewanorra

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Flight deals from Seattle / Tacoma International to St Lucia Hewanorra

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to St Lucia Hewanorra Airport? If you want to travel next month, return fares start from C$1,425. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from Seattle / Tacoma International to St Lucia Hewanorra

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to St Lucia Hewanorra flights are currently cheapest in October.

Seattle / Tacoma International to St Lucia Hewanorra: Alternative routes

Compare routes from Seattle / Tacoma International to Castries below. You may find an airport to fly into that's cheaper, faster, or easier than St Lucia Hewanorra.

Seattle to Castries: Flight information

The things to know before you go.
Cheapest flight foundC$608
Cheapest month to flyOctober

Finding cheap flights from Seattle / Tacoma International to St Lucia Hewanorra: Frequently asked questions

The best price we found for a return flight from Seattle / Tacoma International to St Lucia Hewanorra is C$979. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle / Tacoma International to St Lucia Hewanorra. But we found flights with one or more stops from C$979.
As of May 2026, there are no flights flying from Seattle / Tacoma International to St Lucia Hewanorra.
The cheapest month to fly from Seattle / Tacoma International to St Lucia Hewanorra is usually December.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to St Lucia Hewanorra Airport on Thursday, December 3, 2026.
No airlines currently offer direct flights between Seattle / Tacoma International Airport and St Lucia Hewanorra Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to St Lucia Hewanorra but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Castries is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Delta offers the cheapest flight tickets to St Lucia Hewanorra.

Flying from Seattle-Tacoma International Airport (SEA) to Hewanorra Airport (UVF): what you need to know

  • During popular months like July, it's best to get to the airport earlier than usual. Plan to arrive two hours before a domestic departure and four hours ahead of international flights when you fly during a high season in general.

  • To break up your flight from Seattle-Tacoma International Airport to Hewanorra Airport, consider adding a stopover. Simply uncheck 'Direct flights only' and find a city that interests you. Popular stopovers on the SEA - UVF route include:

    • Hartsfield-Jackson Atlanta International Airport

    • John F. Kennedy International Airport

    • Charlotte Douglas International Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Hewanorra Airport (UVF)

  • The best price we've seen for a one-way ticket from Seattle-Tacoma International Airport to Hewanorra Airport is C$608. The cheapest price for a return flight is C$979. Bear in mind that fares could change due to demand when booking.

  • To find cheap flight tickets from SEA to UVF, book early. Airlines generally offer their most competitively priced fares when flights are first made available.

  • The 'Whole month' search tool shows you the cheapest flight tickets from Seattle-Tacoma International Airport to Hewanorra Airport across every month. It's a great way to find a bargain if your travel dates aren't set in stone.

  • Log into your online account or use the app to set up a Price Alert. You'll be notified straight away if there's a cheaper deal on this route. It's easy to do, and it'll save you the hassle of checking for cheap flight tickets from SEA to UVF every day.

  • Play around with filters to find the perfect journey for you. To see the 'Fastest,' 'Best' or 'Cheapest' flights from Seattle-Tacoma International Airport to Hewanorra Airport, use the 'Sort by' function. You can also filter by airline, arrival and departure times, and journey duration.

Handy information about Seattle-Tacoma International Airport (SEA)

  • Located around 23 kilometres from central Seattle, Seattle-Tacoma International Airport can be reached in approximately 18 minutes by car, depending on traffic. The journey on public transport is roughly 54 minutes.

  • Need a convenient hotel close to SEA? If you're on an early flight from Seattle-Tacoma International Airport to Hewanorra Airport, these stays will have you sleeping moments from your departure gate:

Arriving at Hewanorra Airport (UVF)

Getting from Hewanorra Airport (UVF) to central Castries

  • Hewanorra Airport to the center of Castries is around 1 hour and 9 minutes in a car. It's approximately 56 kilometres away. See what options are available, such as cabs, car rentals or ride-sharing.

When to fly to Hewanorra Airport (UVF)

  • The quietest month for a flight from Seattle-Tacoma International Airport to Hewanorra Airport is May, while July is the most popular. Choose the best time to go to Castries based on whether you prefer a bustling atmosphere or a more laid-back vibe.

  • The warmest month in Castries is September, with the temperature ranging between 26ºC and 30ºC. Book your flights from Seattle-Tacoma International Airport to Hewanorra Airport in this month if this is the type of weather you like.

  • February has average temperatures of between 24ºC and 28ºC. Search for cheap flight tickets from SEA to UVF sometime then if you like cooler conditions.

More about Castries

  • Start your Castries trip right by finding a fantastic place to stay. Once you've booked your flight from SEA to UVF, have a look at our range of accommodation options including:

  • All great vacations should include some sightseeing. Derek Walcott Square, Morne Fortune and Immaculate Conception Church are attractions you won't want to skip in Castries.

Complete your Castries trip with hotels and a car rental

  • Comparing flights is not the only thing we're good at. Once you've booked your cheap ticket to Hewanorra Airport, browse our great car rental offers that'll give you the flexibility to travel around at your own pace. Next, have a look at our exclusive rates for hotels to find your perfect Castries stay.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.