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 $450 and $485, respectively. American Airlines is 38% 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 $716 per person but you can even find prices for as low as $271. The most expensive prices can be found in the month of December. Opting for a September flight can save you 48% 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Saint Thomas Island flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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.

$334+ Flights from Seattle to Saint Thomas Island

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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 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	AranGrant 3 stars
Most trusted provider	AranGrant 3 stars
Round-trip from	$443 (American Airlines)
One-way from	$334 (United Airlines)
Popular in	December
Cheapest in	September
Average price	$764

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

Search Deals

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

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 ($89 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($32 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 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 avril 22, 2025.

dim. 8/3110:32 pmSEA - STT

1 stop11h 08mAmerican Airlines

lun. 9/84:50 pmSTT - SEA

1 stop10h 43mAmerican Airlines

Deal found 4/22

$443

mar. 6/33:20 pmSEA - STT

2 stops15h 37mSpirit Airlines

mar. 6/1010:52 amSTT - SEA

2 stops30h 33mSpirit Airlines

Deal found 4/22

$462

mar. 6/35:50 pmSEA - STT

2 stops15h 17mDelta

mar. 6/101:19 pmSTT - SEA

1 stop12h 46mDelta

Deal found 4/22

$485

ven. 6/63:20 pmSEA - STT

2 stops15h 37mMultiple Airlines

ven. 6/1310:47 amSTT - SEA

3 stops31h 16mMultiple Airlines

Deal found 4/22

$530

dim. 12/145:00 pmSEA - STT

2 stops16h 11mUnited Airlines

lun. 12/221:05 pmSTT - SEA

2 stops14h 21mUnited Airlines

Deal found 4/22

$625

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 avril 22, 2025.

mar. 6/108:01 pmSEA - STT

1 stop16h 59mAmerican Airlines

mar. 6/171:44 pmSTT - SEA

2 stops14h 00mAmerican Airlines

Deal found 4/21

$443

mar. 6/33:20 pmSEA - STT

2 stops15h 37mSpirit Airlines

mar. 6/1010:52 amSTT - SEA

2 stops30h 33mSpirit Airlines

Deal found 4/21

$450

mar. 6/39:45 pmSEA - STT

1 stop11h 22mDelta

mar. 6/103:00 pmSTT - SEA

1 stop11h 05mDelta

Deal found 4/22

$485

ven. 6/63:20 pmSEA - STT

2 stops15h 37mMultiple Airlines

ven. 6/1310:47 amSTT - SEA

3 stops31h 16mMultiple Airlines

Deal found 4/22

$530

lun. 6/3011:58 pmSEA - STT

1 stop12h 45mUnited Airlines

mar. 7/84:45 pmSTT - SEA

1 stop11h 11mUnited Airlines

Deal found 4/22

$631

Last-minute flights from Seattle to Saint Thomas Island
Discover last-minute flight deals from Seattle to Saint Thomas Island. Data last updated avril 22, 2025 and is based on user searches.

lun. 5/510:10 pmSEA - STT

1 stop13h 38mAmerican Airlines

mar. 5/135:10 pmSTT - SEA

2 stops19h 13mAmerican Airlines

Deal found 4/22

$557

lun. 5/55:13 pmSEA - STT

2 stops16h 48mUnited Airlines

mar. 5/204:45 pmSTT - SEA

3 stops31h 46mUnited Airlines

Deal found 4/22

$935

mar. 5/612:30 pmSEA - STT

2 stops18h 27mSpirit Airlines

mer. 5/2110:52 amSTT - SEA

2 stops40h 18mSpirit Airlines

Deal found 4/21

$506

mar. 5/610:30 pmSEA - STT

1 stop13h 40mDelta

mer. 5/212:51 pmSTT - SEA

1 stop10h 09mDelta

Deal found 4/21

$775

ven. 5/2311:59 pmSEA - STT

3 stops30h 58mMultiple Airlines

lun. 5/262:41 pmSTT - SEA

2 stops36h 29mMultiple Airlines

Deal found 4/22

$719

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 avril 22, 2025.

mer. 4/303:24 pmSEA - STT

3 stops18h 37mUnited Airlines

Deal found 4/22

$334

mer. 4/3010:30 pmSEA - STT

1 stop13h 35mDelta

Deal found 4/22

$379

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

dim. 8/31

10:32 pm-12:40 pm

1 stop11h 08m

Saint Thomas Island Cyril E King

lun. 9/8

4:50 pm-12:33 am

1 stop10h 43m

$443

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

mar. 6/3

3:20 pm-9:57 am

2 stops15h 37m

Saint Thomas Island Cyril E King

mar. 6/10

10:52 am-2:25 pm

2 stops30h 33m

$462

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

mar. 6/3

5:50 pm-12:07 pm

2 stops15h 17m

Saint Thomas Island Cyril E King

mar. 6/10

1:19 pm-11:05 pm

1 stop12h 46m

$485

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

ven. 6/6

3:20 pm-9:57 am

2 stops15h 37m

Saint Thomas Island Cyril E King

ven. 6/13

10:47 am-3:03 pm

3 stops31h 16m

$530

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

lun. 6/30

11:58 pm-3:43 pm

1 stop12h 45m

Saint Thomas Island Cyril E King

mar. 7/8

4:45 pm-12:56 am

1 stop11h 11m

$631

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

mer. 4/30

11:45 pm-3:43 pm

2 stops12h 58m

$334

SeattleSaint Thomas Island

SEA - STT

SEASTT

Seattle/Tacoma Intl

mer. 4/30

10:30 pm-3:05 pm

1 stop13h 35m

$379

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

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*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 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 AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Saint Thomas Island flight deals on Cheapflights vs. AranGrant >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 AranGrant the most. AranGrant 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

7,920 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

7,920 reviews

Delta

8.0

Very good

7,920 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

8,683 reviews

Delta

8.0

Very good

7,920 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

7,920 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

7,940 reviews

Delta

8.0

Very good

7,920 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 $450 and $485, respectively. American Airlines is 38% 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$479	FlexibilityNo cancel fee	On-time65%
Delta	Cheapest$426	Average$772	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$485	Average$735	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$539	Average$714	FlexibilityNo cancel fee	On-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.

$334+ 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 4/30. 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 avril 22, 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 avril 22, 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 April 18, 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 avril 22, 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?

Traveling to a place near Seattle?

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.

Top 4 airlines flying from Seattle to Saint Thomas Island

100% Free

Book with Flexibility

Travel Smart

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 avril 22, 2025.