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

Currently priced at $443, American Airlines will fly you from Seattle to Saint Thomas Island and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Spirit Airlines and Delta - these airlines can fly you to your destination from $531 and $556, respectively. American Airlines is 39% cheaper than the average price of flights available within the next 90 days to this destination.

What is the cheapest day to fly from Seattle to Saint Thomas Island?

Travelers seeking maximum savings on their Seattle to Saint Thomas Island flight should consider departing on Tuesday at noon when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from Seattle to Saint Thomas Island?

Before booking your flight from Seattle to Saint Thomas Island check out the most popular airlines for this route: American Airlines, Delta or Spirit Airlines.

What is the cheapest day to fly round-trip from Seattle to Saint Thomas Island?

Wednesday flights are generally found to be more expensive for flights from Seattle to Saint Thomas Island. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Saint Thomas Island.

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

Find a great deal and save up to 261% by booking at least 59 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Seattle to Saint Thomas Island within the next two weeks, with the cheapest ticket starting at $735.

What is the cheapest month to fly from Seattle to Saint Thomas Island?

September is one of the best times of the year to fly to Saint Thomas Island from Seattle. Prices for September average $735 per person but you can even find prices for as low as $327. The most expensive prices can be found in the month of December. Opting for a September flight can save you 44% on your journey compared to booking in December

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.

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.

$265+ Flights from Seattle to Saint Thomas Island

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Saint Thomas Island Cyril E King are usually found in September or October, 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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$443 (American Airlines)
One-way from	$265 (United Airlines)
Popular in	December
Cheapest in	September
Average price	$789

Provider with most accurate pricing for Seattle/Tacoma Intl-Saint Thomas Island Cyril E King flight deals.

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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Saint Thomas Island Cyril E King flights.

Search Deals

From Seattle/Tacoma Intl to Saint Thomas Island Cyril E King

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One-way flight from Seattle/Tacoma Intl to Saint Thomas Island Cyril E King

Search Deals

Highest demand for flights based on searches. 9% potential increase in price ($72 potential increase over avg. RT price).

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Cheapest flight prices on average. 4% potential price decrease ($31 potential savings vs. average RT price).

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Average for round-trip flights in April 2025

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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 April 3, 2025.

Sun 8/3110:58 pmSEA - STT

1 stop12h 52mAmerican Airlines

Mon 9/81:50 pmSTT - SEA

1 stop13h 43mAmerican Airlines

Deal found 4/2

$443

Thu 4/1712:30 pmSEA - STT

2 stops18h 30mSpirit Airlines

Thu 4/2411:05 amSTT - SEA

2 stops27h 30mSpirit Airlines

Deal found 4/2

$531

Wed 6/116:59 pmSEA - STT

2 stops15h 47mDelta

Mon 6/163:00 pmSTT - SEA

1 stop11h 58mDelta

Deal found 4/2

$556

Thu 4/1711:50 pmSEA - STT

3 stops33h 54mMultiple Airlines

Mon 4/2111:05 amSTT - SEA

3 stops27h 30mMultiple Airlines

Deal found 4/1

$691

Fri 10/2411:59 pmSEA - STT

1 stop12h 34mUnited Airlines

Sun 11/21:05 pmSTT - SEA

1 stop11h 05mUnited Airlines

Deal found 4/2

$804

Best flights from Seattle to Saint Thomas Island
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 April 3, 2025.

Sun 8/3110:58 pmSEA - STT

1 stop12h 52mAmerican Airlines

Mon 9/81:50 pmSTT - SEA

1 stop13h 43mAmerican Airlines

Deal found 4/2

$443

Thu 4/1712:30 pmSEA - STT

2 stops18h 30mSpirit Airlines

Thu 4/2411:05 amSTT - SEA

2 stops27h 30mSpirit Airlines

Deal found 4/2

$531

Wed 6/116:59 pmSEA - STT

2 stops15h 47mDelta

Mon 6/163:00 pmSTT - SEA

1 stop11h 58mDelta

Deal found 4/2

$556

Thu 4/1711:50 pmSEA - STT

3 stops33h 54mMultiple Airlines

Mon 4/2111:05 amSTT - SEA

3 stops27h 30mMultiple Airlines

Deal found 4/1

$691

Tue 8/125:10 pmSEA - STT

2 stops16h 07mUnited Airlines

Sat 8/164:00 pmSTT - SEA

2 stops19h 01mUnited Airlines

Deal found 4/2

$841

Last-minute flights from Seattle to Saint Thomas Island
Discover last-minute flight deals from Seattle to Saint Thomas Island. Data last updated April 3, 2025 and is based on user searches.

Fri 4/411:30 pmSEA - STT

1 stop11h 14mDelta

Sun 4/131:55 pmSTT - SEA

1 stop12h 58mDelta

Deal found 4/2

$959

Thu 4/1712:30 pmSEA - STT

2 stops18h 30mSpirit Airlines

Thu 4/2411:05 amSTT - SEA

2 stops27h 30mSpirit Airlines

Deal found 4/2

$531

Thu 4/1711:50 pmSEA - STT

3 stops33h 54mMultiple Airlines

Mon 4/2111:05 amSTT - SEA

3 stops27h 30mMultiple Airlines

Deal found 4/1

$691

Sat 4/265:10 pmSEA - STT

3 stops20h 50mUnited Airlines

Wed 5/144:45 pmSTT - SEA

2 stops18h 41mUnited Airlines

Deal found 4/2

$918

Mon 5/511:58 pmSEA - STT

2 stops13h 22mAmerican Airlines

Tue 5/1311:40 amSTT - SEA

2 stops14h 29mAmerican Airlines

Deal found 4/2

$443

One-way flights from Seattle to Saint Thomas Island
Search for one-way flight options from Seattle to Saint Thomas Island. Find affordable one-way fares based on user searches. Data last updated April 3, 2025.

Fri 4/257:33 pmSEA - STT

2 stops17h 10mUnited Airlines

Deal found 4/2

$265

Cheapflights Fare Finder

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

Price

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Sun 8/31

10:58 pm-2:50 pm

1 stop12h 52m

Saint Thomas Island Cyril E King

Mon 9/8

1:50 pm-12:33 am

1 stop13h 43m

$443

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Thu 4/17

12:30 pm-10:00 am

2 stops18h 30m

Saint Thomas Island Cyril E King

Thu 4/24

11:05 am-11:35 am

2 stops27h 30m

$531

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Wed 6/11

6:59 pm-1:46 pm

2 stops15h 47m

Saint Thomas Island Cyril E King

Mon 6/16

3:00 pm-11:58 pm

1 stop11h 58m

$556

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Thu 4/17

11:50 pm-12:44 pm

3 stops33h 54m

Saint Thomas Island Cyril E King

Mon 4/21

11:05 am-11:35 am

3 stops27h 30m

$691

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Tue 8/12

5:10 pm-12:17 pm

2 stops16h 07m

Saint Thomas Island Cyril E King

Sat 8/16

4:00 pm-8:01 am

2 stops19h 01m

$841

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

Fri 4/25

7:33 pm-3:43 pm

2 stops17h 10m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/2

Compare providers for flights from Seattle to Saint Thomas Island

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 April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
AranGrant	Price Accuracy3 stars	Trust Score*1 star
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

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.

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 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 $640). 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?

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

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

7,897 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines

7.4

Good

8,619 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Spirit Airlines

6.3

Okay

7,889 reviews

Delta

8.0

Very good

7,897 reviews

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the cheapest airlines flying from Seattle to Saint Thomas Island round-trip?
Currently priced at $443, American Airlines will fly you from Seattle to Saint Thomas Island and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Spirit Airlines and Delta - these airlines can fly you to your destination from $531 and $556, respectively. American Airlines is 39% 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 $640). 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

St. John

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from Seattle to Saint Thomas Island

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$199	Average$496	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$426	Average$801	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$493	Average$761	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$539	Average$735	FlexibilityNo cancel fee	On-time69%

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$265+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Seattle to Saint Thomas Island with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Saint Thomas Island Cyril E King are usually found in September or October, 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

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Seattle to Saint Thomas Island

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 April 3, 2025.

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 April 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Seattle to Saint Thomas Island that are best for you.

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 April.

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.

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 March 28, 2025.

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

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 April 3, 2025.

Reviews of airlines servicing Saint Thomas Island

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.

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

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

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

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

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

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Alternative routes for Seattle to Saint Thomas Island

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Top 4 airlines flying from Seattle to Saint Thomas Island

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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 April 3, 2025.