$386+ 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 10/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — STT
Sep 16 — Sep 231
Round-trip
1 adult, Economy
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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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Saint Thomas Island
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Cheapest flights from Seattle to Saint Thomas IslandExplore 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 August 17, 2026.
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 August 17, 2026.
This American Airlines deal was found by Cheapflights users on 8/14. 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.
Tue 10/278:39 pm -
1 stop15h 16m
Sun 11/14:53 pm -
2 stops20h 46m
Deal found 8/14![American Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 8/16. 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 10/195:39 pm -
2 stops15h 48m
Sat 10/243:46 pm -
2 stops20h 45m
Deal found 8/16![American Airlines logo]()
$553
This American Airlines deal was found by Cheapflights users on 8/13. 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 10/205:39 pm -
2 stops16h 02m
Tue 10/273:46 pm -
2 stops20h 45m
Deal found 8/13![American Airlines logo]()
$564
This American Airlines deal was found by Cheapflights users on 8/17. 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.
Sun 10/188:39 pm -
1 stop15h 16m
Sat 10/243:46 pm -
2 stops20h 45m
Deal found 8/17![American Airlines logo]()
$579
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Sat 11/2810:00 pm -
2 stops14h 20m
Sat 12/53:35 pm -
1 stop11h 03m
Deal found 8/16![United Airlines logo]()
$581
This American Airlines deal was found by Cheapflights users on 8/17. 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 10/1711:59 pm -
2 stops11h 56m
Sat 10/243:46 pm -
2 stops20h 45m
Deal found 8/17![American Airlines logo]()
$599
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Tue 12/111:34 pm -
2 stops12h 04m
Tue 12/153:15 pm -
1 stop12h 44m
Deal found 8/16![American Airlines logo]()
$606
Best flights from Seattle to Saint Thomas IslandDiscover carefully curated flight deals from Seattle to Saint Thomas Island that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
Discover carefully curated flight deals from Seattle to Saint Thomas Island that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 17, 2026.
This United Airlines deal was found by Cheapflights users on 8/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/155:23 pm -
2 stops16h 33m
Mon 11/231:07 pm -
2 stops14h 10m
Deal found 8/14![United Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 8/17. 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 11/135:23 pm -
2 stops16h 33m
Sun 11/223:00 pm -
1 stop12h 17m
Deal found 8/17![United Airlines logo]()
$731
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Tue 10/2712:20 pm -
3 stops21h 36m
Sun 11/13:35 pm -
2 stops23h 39m
Deal found 8/15![United Airlines logo]()
$733
Last-minute flights from Seattle to Saint Thomas IslandDiscover last-minute flight deals from Seattle to Saint Thomas Island. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Saint Thomas Island. Data last updated August 17, 2026 and is based on user searches.
This United deal was found by Cheapflights users on 8/17. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:00 am -
2 stops27h 01m
Tue 8/2512:57 pm -
2 stops25h 06m
Deal found 8/17![Multiple Airlines logo]()
$1,254
This American Airlines deal was found by Cheapflights users on 8/17. 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 8/203:08 pm -
2 stops21h 44m
Wed 8/2611:49 am -
2 stops29h 56m
Deal found 8/17![American Airlines logo]()
$1,372
This United deal was found by Cheapflights users on 8/13. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:00 pm -
2 stops15h 20m
Wed 9/95:40 pm -
2 stops24h 12m
Deal found 8/13![Multiple Airlines logo]()
$1,144
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/28:21 pm -
1 stop16h 31m
Wed 9/91:41 pm -
2 stops23h 28m
Deal found 8/13![American Airlines logo]()
$1,146
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Wed 9/28:21 pm -
1 stop16h 31m
Tue 9/81:49 pm -
2 stops23h 20m
Deal found 8/16![American Airlines logo]()
$1,196
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Sun 9/136:15 pm -
2 stops15h 36m
Sat 9/194:53 pm -
2 stops20h 16m
Deal found 8/13![American Airlines logo]()
$1,182
This FlightHub deal was found by Cheapflights users on 8/15. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:42 pm -
2 stops35h 19m
Mon 9/213:00 pm -
2 stops34h 37m
Deal found 8/15![JetBlue logo]()
$886
This American Airlines deal was found by Cheapflights users on 8/15. 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.
Mon 9/146:15 pm -
2 stops15h 36m
Mon 9/211:41 pm -
1 stop13h 11m
Deal found 8/15![American Airlines logo]()
$1,133
This American Airlines deal was found by Cheapflights users on 8/15. 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.
Mon 9/218:50 pm -
1 stop13h 01m
Tue 9/291:41 pm -
2 stops22h 42m
Deal found 8/15![American Airlines logo]()
$813
One-way flights from Seattle to Saint Thomas IslandSearch for one-way flight options from Seattle to Saint Thomas Island. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
Search for one-way flight options from Seattle to Saint Thomas Island. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/214:27 pm -
3 stops40h 56m
Deal found 8/13![Multiple Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2112:45 pm -
2 stops22h 15m
Deal found 8/13![Southwest logo]()
$398
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/84:15 pm -
2 stops18h 45m
Deal found 8/12![Southwest logo]()
$408
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/88:00 pm -
3 stops32h 50m
Deal found 8/12![Multiple Airlines logo]()
$562
This American Airlines deal was found by Cheapflights users on 8/12. 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 10/88:39 pm -
1 stop13h 19m
Deal found 8/12![American Airlines logo]()
$572
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 10/218:39 pm -
1 stop13h 19m
Deal found 8/13![American Airlines logo]()
$577
Find 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 August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $494 (American Airlines) |
One-way from | $386 (Kiwi.com) |
Popular in | November |
Cheapest in | August |
Average price | $541 |
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 August 17, 2026.
Use the filters below to find and compare flights from Seattle to Saint Thomas Island that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleSaint Thomas Island
SEA Seattle/Tacoma Intl - STT Saint Thomas Island Cyril E King
SEASTT
Seattle/Tacoma Intl
Sun 11/15
5:23 pm-1:56 pm
2 stops16h 33m
Saint Thomas Island Cyril E King
Mon 11/23
1:07 pm-11:17 pm
2 stops14h 10m
$731
Quickest round-trip
SeattleSaint Thomas Island
SEA Seattle/Tacoma Intl - STT Saint Thomas Island Cyril E King
SEASTT
Seattle/Tacoma Intl
Fri 11/13
5:23 pm-1:56 pm
2 stops16h 33m
Saint Thomas Island Cyril E King
Sun 11/22
3:00 pm-11:17 pm
1 stop12h 17m
$731
SeattleSaint Thomas Island
SEA Seattle/Tacoma Intl - STT Saint Thomas Island Cyril E King
SEASTT
Seattle/Tacoma Intl
Tue 10/27
12:20 pm-12:56 pm
3 stops21h 36m
Saint Thomas Island Cyril E King
Sun 11/1
3:35 pm-11:14 am
2 stops23h 39m
$733
Cheapest one-way
SeattleSaint Thomas Island
SEA Seattle/Tacoma Intl - STT Saint Thomas Island Cyril E King
SEASTT
Seattle/Tacoma Intl
Wed 10/21
12:45 pm-2:00 pm
2 stops22h 15m
$398
SeattleSaint Thomas Island
SEA Seattle/Tacoma Intl - STT Saint Thomas Island Cyril E King
SEASTT
Seattle/Tacoma Intl
Thu 10/8
4:15 pm-2:00 pm
2 stops18h 45m
$408
SeattleSaint Thomas Island
SEA Seattle/Tacoma Intl - STT Saint Thomas Island Cyril E King
SEASTT
Seattle/Tacoma Intl
Thu 10/8
8:00 pm-7:50 am
3 stops32h 50m
$562
Quickest one-way
SeattleSaint Thomas Island
SEA Seattle/Tacoma Intl - STT Saint Thomas Island Cyril E King
SEASTT
Seattle/Tacoma Intl
Thu 10/8
8:39 pm-12:58 pm
1 stop13h 19m
$572
Sorted by cheapest first
Compare providers for flights from Seattle to Saint Thomas Island
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Saint Thomas Island in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Saint Thomas Island flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Saint Thomas Island flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Saint Thomas Island flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Saint Thomas Island flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Saint Thomas Island flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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.
SEA-STT
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?
Booking 29 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, August is the cheapest month in which you can book a flight from Seattle to Saint Thomas Island (average of $541). Flying from Seattle to Saint Thomas Island in November is currently the most expensive (average of $935). 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.
How much does it cost to fly round-trip from Seattle to Saint Thomas Island?
Airfare is below average for this route at the moment.
Seattle to Saint Thomas Island flights typically cost between $516 and $744 in January.The cheapest round-trip price found within the last 5 days was $494 on American Airlines (Jan 23-Feb 1).
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 August 17, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican 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.
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.8
Entertainment
7.8
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
Traveling to a place near Saint Thomas Island?
Book flights to Saint Thomas Island if you plan to visit one of these locationsSt. John
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Complete your trip
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Seattle and Saint Thomas Island flights
Browse other Seattle and Saint Thomas Island flight options. Last updated on August 17, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
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Other flights to Saint Thomas Island
Explore flights to Saint Thomas Island departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 17, 2026.
Top 3 airlines flying from Seattle to Saint Thomas Island
Discover the top 3 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 August 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$428 | Average$886 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$438 | Average$563 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$473 | Average$714 | FlexibilityNo cancel fee | On-time71% |