$235 Cheap Flights from Seattle (SEA) to St. Thomas (STT)

View $235 flight on Sun, Apr 12, 2026Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Cyril E. King Airport (STT)

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Cheap Flights from Seattle to St. Thomas (SEA-STT)

Prices were available within the past 7 days and start at $235 for one-way flights and $473 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Mon, Mar 2 - Tue, Mar 10
SEA
Seattle
STT
St. Thomas
$473 Roundtrip, just found
$473
Roundtrip
just found
Select American Airlines flight, departing Mon, Mar 2 from Seattle to St. Thomas, returning Tue, Mar 10, priced at $473 just found
Delta
Mon, Mar 2 - Tue, Mar 10
SEA
Seattle
STT
St. Thomas
$473 Roundtrip, just found
$473
Roundtrip
just found
Select Delta flight, departing Mon, Mar 2 from Seattle to St. Thomas, returning Tue, Mar 10, priced at $473 just found
United
Mon, Mar 2 - Tue, Mar 10
SEA
Seattle
STT
St. Thomas
$473 Roundtrip, just found
$473
Roundtrip
just found
Select United flight, departing Mon, Mar 2 from Seattle to St. Thomas, returning Tue, Mar 10, priced at $473 just found
American Airlines
Mon, Mar 2 - Tue, Mar 10
SEA
Seattle
STT
St. Thomas
$477 Roundtrip, just found
$477
Roundtrip
just found
Select American Airlines flight, departing Mon, Mar 2 from Seattle to St. Thomas, returning Tue, Mar 10, priced at $477 just found
American Airlines
Thu, Feb 5 - Thu, Feb 12
SEA
Seattle
STT
St. Thomas
$479 Roundtrip, found 2 hours ago
$479
Roundtrip
found 2 hours ago
Select American Airlines flight, departing Thu, Feb 5 from Seattle to St. Thomas, returning Thu, Feb 12, priced at $479 found 2 hours ago
United
Fri, Oct 31 - Fri, Nov 7
SEA
Seattle
STT
St. Thomas
$481 Roundtrip, found 1 hour ago
$481
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Oct 31 from Seattle to St. Thomas, returning Fri, Nov 7, priced at $481 found 1 hour ago
United
Tue, Feb 3 - Mon, Feb 9
SEA
Seattle
STT
St. Thomas
$483 Roundtrip, found 8 hours ago
$483
Roundtrip
found 8 hours ago
Select United flight, departing Tue, Feb 3 from Seattle to St. Thomas, returning Mon, Feb 9, priced at $483 found 8 hours ago
American Airlines
Wed, Dec 3 - Wed, Dec 10
SEA
Seattle
STT
St. Thomas
$483 Roundtrip, found 1 day ago
$483
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Dec 3 from Seattle to St. Thomas, returning Wed, Dec 10, priced at $483 found 1 day ago
JetBlue Airways
Fri, Oct 17 - Mon, Oct 20
SEA
Seattle
STT
St. Thomas
$542 Roundtrip, found 3 days ago
$542
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Fri, Oct 17 from Seattle to St. Thomas, returning Mon, Oct 20, priced at $542 found 3 days ago
Southwest Airlines
Mon, Feb 9 - Fri, Feb 13
SEA
Seattle
STT
St. Thomas
$697 Roundtrip, found 18 hours ago
$697
Roundtrip
found 18 hours ago
Select Southwest Airlines flight, departing Mon, Feb 9 from Seattle to St. Thomas, returning Fri, Feb 13, priced at $697 found 18 hours ago

Find the cheapest month to fly from Seattle (SEA) to St. Thomas (STT)

March is typically the cheapest month to fly

From $261 - $862 per traveler.

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT) cost?
Secure a cheap one-way flight from $235 or cheap return flight from $473 from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT)?
The cheapest month to fly from SEA to STT is March, when demand is low. Off-peak season is generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT)?
To find the cheapest airline flying from SEA to STT, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT)?
Direct flights from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to STT?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change depending on various factors, including the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT)?
To reach Cyril E. King Airport (STT) on schedule, select a flight that takes off from Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT) last-minute?
Last-minute fares from SEA to STT are usually more expensive. To lock in the best rates, start searching for flights ahead of time. That said, if you can play around with your travel dates, you may land a cheap ticket right before your journey.
Is it cheaper to book a SEA to STT flight and hotel package?
Compared with arranging hotels and flights separately, booking a SEA to STT flight and hotel package with Expedia could result in significant savings. Better still, having everything in one easy place will take the stress out of planning your trip. Just pick your flights and select from our extensive range of hotels, then tailor your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Cyril E. King Airport (STT)?
Typically, you can modify or cancel your SEA to STT flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you'd like further information, visit our Customer Service portal.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Cyril E. King
Airlines serving
American Airlines, Delta, JetBlue Airways, Southwest Airlines, United
Roundtrip price
$473
Distance
3777 mi

Book with confidence

Book with confidence

Seattle to St. Thomas Flights

The cheapest times to fly from Seattle to St. Thomas

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to St. Thomas are during the month of March. You can find some of the cheapest flights from Seattle to St. Thomas with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to St. Thomas

Sunday is one of the best days to book for cheap flights from Seattle to St. Thomas: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to St. Thomas

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to St. Thomas in 2025. You can also book with separate airlines for your outbound and return journeys, from $235 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to St. Thomas flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to St. Thomas airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Seattle to St. Thomas Flights

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Explore a world of travel with Expedia

*Available to One Key members.