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Flights from Castries to Seattle Starting at US$346

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Castries to Seattle

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Airlines Flying from Castries to Seattle

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

WestJet
From US$346
Jetblue Airways
From US$370
United Airlines
From US$390
Caribbean Airlines
From US$470
British Airways
From US$2,675

Find more flights and airlines

Alternative Routes from Castries to Seattle

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Castries to Seattle.

  • Cheapest
    WestJet
    UVF
    15:40
    31h 2m
    1 transfer
    SEA
    18:42
    Hewanorra Airport - Seattle-Tacoma International Airport
    Tue, Dec 24WestJet
    US$346
  • Caribbean Airlines
    SLU
    10:25
    27h 53m
    2 transfer
    SEA
    10:18
    George F. L. Charles Airport - Seattle-Tacoma International Airport
    Wed, Nov 13Caribbean Airlines
    US$470
  • Caribbean Airlines
    SLU
    10:25
    27h 53m
    2 transfer
    SEA
    10:18
    George F. L. Charles Airport - Seattle-Tacoma International Airport
    Wed, Nov 13Caribbean Airlines
    US$470
    Find More Flights

FAQ

  • When are flight tickets from Castries (SLU) to Seattle (SEA) the cheapest?

    Airlines adjust prices for flights from Castries to Seattle based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much do flights from Castries (SLU) to Seattle (SEA) cost?

    According to Trip.com's data, the lowest price is around $461.
  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17 km. It takes about 30 minutes by taxi.
    • The distance from Lake Union Sea Plane Base to downtown is about 2 km. It takes about 20 minutes by taxi.

How to find a cheap flight from Castries to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Castries to Seattle. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information from Castries to Seattle

Cheapest nonstop flight price$345
Off-season for travelSeptember
Peak season for travelFebruary
Flight distance6,719.39 km
Popular airlineCaribbean Airlines