HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Saint Thomas Island

$207+ Cheap flights from Seattle (SEA) to Saint Thomas Island (STT)

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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STT
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Saint Thomas Island with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Saint Thomas Island Cyril E King are usually found in September or January, booked 58 days in advance, depart on a Tuesday or Monday and return on a Friday

Cheap flight deals from Seattle to Saint Thomas Island

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Saint Thomas Island (STT). 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 September 16, 2025.

Round-trip from

$473
(United Airlines)

One-way from

$207
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$541
From Seattle/Tacoma Intl to Saint Thomas Island Cyril E King
Search Deals
One-way flight from Seattle/Tacoma Intl to Saint Thomas Island Cyril E King
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Seattle to Saint Thomas Island

Cheapest flights from Seattle to Saint Thomas Island
Explore the most affordable flight options available from Seattle to Saint Thomas Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/14. 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.
Sat 10/1810:01 pmSEA - STT
1 stop9h 49mAmerican Airlines
Wed 11/51:36 pmSTT - SEA
1 stop11h 03mAmerican Airlines
Deal found 9/14$473
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Sat 10/1810:01 pmSEA - STT
1 stop9h 49mAmerican Airlines
Fri 10/315:20 pmSTT - SEA
2 stops19h 28mAmerican Airlines
Deal found 9/14$475
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 12/210:08 pmSEA - STT
1 stop14h 50mAmerican Airlines
Fri 12/56:17 pmSTT - SEA
2 stops20h 21mAmerican Airlines
Deal found 9/15$511
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Thu 12/1110:08 pmSEA - STT
1 stop14h 50mAmerican Airlines
Wed 12/176:17 pmSTT - SEA
2 stops19h 45mAmerican Airlines
Deal found 9/14$534
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/612:34 amSEA - STT
2 stops12h 31mAmerican Airlines
Thu 10/165:20 pmSTT - SEA
2 stops19h 22mAmerican Airlines
Deal found 9/16$549
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 10/183:28 pmSEA - STT
2 stops18h 40mUnited Airlines
Wed 11/51:02 pmSTT - SEA
2 stops15h 57mUnited Airlines
Deal found 9/15$563
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Sat 11/19:20 pmSEA - STT
1 stop16h 37mAmerican Airlines
Tue 11/116:17 pmSTT - SEA
2 stops19h 32mAmerican Airlines
Deal found 9/14$601
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/245:26 pmSEA - STT
3 stops19h 17mUnited Airlines
Mon 10/2712:02 pmSTT - SEA
2 stops15h 57mUnited Airlines
Deal found 9/16$634

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Saint Thomas Island 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 September 16, 2025.
Use the filters below to find and compare flights from Seattle to Saint Thomas Island that are best for you.

Fly from

Seattle

Fly to

Saint Thomas Island

Route

Depart

Return

Price

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Sun 1/11

7:30 pm-1:56 pm

2 stops14h 26m

Saint Thomas Island Cyril E King

Thu 1/22

1:02 pm-8:37 pm

1 stop11h 35m

$473

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Sun 1/11

6:22 pm-11:50 am

2 stops13h 28m

Saint Thomas Island Cyril E King

Thu 1/22

6:35 pm-9:36 am

2 stops19h 01m

$473

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Sun 1/11

9:55 pm-1:45 pm

1 stop11h 50m

Saint Thomas Island Cyril E King

Thu 1/22

3:00 pm-10:25 pm

1 stop11h 25m

$473

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Mon 11/17

7:28 pm-1:12 pm

2 stops13h 44m

Saint Thomas Island Cyril E King

Thu 11/20

1:02 pm-12:59 am

2 stops15h 57m

$473

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Tue 3/10

11:35 pm-11:50 am

1 stop9h 15m

Saint Thomas Island Cyril E King

Wed 3/25

2:00 pm-12:16 am

1 stop13h 16m

$473

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Fri 12/5

7:29 pm-2:30 pm

2 stops15h 01m

Saint Thomas Island Cyril E King

Mon 12/8

1:02 pm-12:59 am

2 stops15h 57m

$473

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Fri 10/24

7:37 pm-3:43 pm

2 stops17h 06m

Saint Thomas Island Cyril E King

Mon 10/27

12:02 pm-8:54 pm

1 stop11h 52m

$473

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Sat 10/18

10:01 pm-10:50 am

1 stop9h 49m

Saint Thomas Island Cyril E King

Fri 10/31

1:39 pm-11:35 pm

1 stop12h 56m

$475

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Wed 1/21

9:55 pm-1:45 pm

1 stop11h 50m

$235

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Tue 1/6

1:56 pm-11:50 am

1 stop17h 54m

$235

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 17 results
1
2

Best time to book a flight from Seattle to Saint Thomas Island

Have a flexible travel schedule? Discover the best time to fly to Saint Thomas Island 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 Saint Thomas Island

How far ahead should I book a flight from Seattle to Saint Thomas Island?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Saint Thomas Island. Price data was last updated on September 12, 2025.

Booking 58 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Saint Thomas Island. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Saint Thomas Island?

Currently, September is the cheapest month in which you can book a flight from Seattle to Saint Thomas Island (average of $433). Flying from Seattle to Saint Thomas Island in June is currently the most expensive (average of $643). 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 STT?

Find hourly flight availability from Seattle to Saint Thomas Island. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

It’s typically best to fly out from Seattle to Saint Thomas Island in the afternoon. Doing so could potentially save you 52% on the flight price compared to flying in the evening, which is usually more expensive.

Reviews of airlines servicing Saint Thomas Island

Get insights into the airlines that provide service to Saint Thomas Island. 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 Saint Thomas Island. Reviews last updated September 16, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Seattle to Saint Thomas Island have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,924 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Spirit Airlines
6.3
Okay
8,019 reviews
Delta
8.0
Very good
7,957 reviews

Comfort

7.9

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Seattle to Saint Thomas Island. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Saint Thomas Island?

    Departing from Seattle to Saint Thomas Island will take you 11h 50m. The distance between Seattle and Saint Thomas Island is about 3775 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Seattle to Saint Thomas Island round-trip?

    Currently priced at $261, Spirit Airlines will fly you from Seattle to Saint Thomas Island and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $280 and $443, respectively. Spirit Airlines is 61% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Seattle to Saint Thomas Island that include hotel bookings?

    Yes. In addition to deals on Seattle to Saint Thomas Island flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Saint Thomas Island?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Saint Thomas Island.

  • Can I find deals for business class flights from Seattle to Saint Thomas Island?

    Yes. Cheapflights offers flight deals from Seattle to Saint Thomas Island 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 Saint Thomas Island?

    Currently, September is the cheapest month in which you can book a flight from Seattle to Saint Thomas Island (average of $433). Flying from Seattle to Saint Thomas Island in June is currently the most expensive (average of $643). 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

Traveling to a place near Saint Thomas Island?

Book flights to Saint Thomas Island if you plan to visit one of these locations
St. John

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Saint Thomas Island

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Christiansted flights
Portland to Saint Thomas Island flights
Portland to Christiansted flights

Top 4 airlines flying from Seattle to Saint Thomas Island

Discover the top 4 airlines that operate flights from Seattle to Saint Thomas Island. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$261Average$540FlexibilityNo cancel feeOn-time65%
DeltaCheapest$280Average$652FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$443Average$709FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$495Average$694FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.