$1,226 Cheap Flights from Seattle (SEA) to São Tomé Island (TMS)

View $1,226 flight on Sun, Nov 9, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to São Tomé Island (TMS-São Tomé Intl.)

Cheap Flights from Seattle to São Tomé Island (SEA-TMS)

Prices were available within the past 7 days and start at $1,226 for one-way flights and $1,462 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Oct 23 - Sun, Nov 9
SEA
Seattle
TMS
São Tomé Island
$1,462 Roundtrip, found 1 day ago
$1,462
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 23 from Seattle to São Tomé Island, returning Sun, Nov 9, priced at $1,462 found 1 day ago
United
Fri, Oct 24 - Sun, Nov 9
SEA
Seattle
TMS
São Tomé Island
$1,474 Roundtrip, found 1 day ago
$1,474
Roundtrip
found 1 day ago
Select United flight, departing Fri, Oct 24 from Seattle to São Tomé Island, returning Sun, Nov 9, priced at $1,474 found 1 day ago
United
Wed, Oct 22 - Sun, Nov 9
SEA
Seattle
TMS
São Tomé Island
$1,479 Roundtrip, found 1 day ago
$1,479
Roundtrip
found 1 day ago
Select United flight, departing Wed, Oct 22 from Seattle to São Tomé Island, returning Sun, Nov 9, priced at $1,479 found 1 day ago
United
Thu, Oct 23 - Wed, Nov 12
SEA
Seattle
TMS
São Tomé Island
$1,504 Roundtrip, found 1 day ago
$1,504
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 23 from Seattle to São Tomé Island, returning Wed, Nov 12, priced at $1,504 found 1 day ago
United
Thu, Oct 23 - Fri, Nov 14
SEA
Seattle
TMS
São Tomé Island
$1,511 Roundtrip, found 1 day ago
$1,511
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 23 from Seattle to São Tomé Island, returning Fri, Nov 14, priced at $1,511 found 1 day ago
United
Thu, Oct 23 - Sat, Nov 8
SEA
Seattle
TMS
São Tomé Island
$1,513 Roundtrip, found 1 day ago
$1,513
Roundtrip
found 1 day ago
Select United flight, departing Thu, Oct 23 from Seattle to São Tomé Island, returning Sat, Nov 8, priced at $1,513 found 1 day ago
United
Thu, Nov 27 - Wed, Dec 17
SEA
Seattle
TMS
São Tomé Island
$1,516 Roundtrip, found 1 day ago
$1,516
Roundtrip
found 1 day ago
Select United flight, departing Thu, Nov 27 from Seattle to São Tomé Island, returning Wed, Dec 17, priced at $1,516 found 1 day ago
Lufthansa
Wed, Nov 26 - Wed, Dec 17
SEA
Seattle
TMS
São Tomé Island
$1,534 Roundtrip, found 1 day ago
$1,534
Roundtrip
found 1 day ago
Select Lufthansa flight, departing Wed, Nov 26 from Seattle to São Tomé Island, returning Wed, Dec 17, priced at $1,534 found 1 day ago
Air Canada
Fri, Nov 28 - Wed, Dec 17
SEA
Seattle
TMS
São Tomé Island
$1,598 Roundtrip, found 1 day ago
$1,598
Roundtrip
found 1 day ago
Select Air Canada flight, departing Fri, Nov 28 from Seattle to São Tomé Island, returning Wed, Dec 17, priced at $1,598 found 1 day ago
TAP Portugal
Sat, Dec 27 - Sat, Jan 3
SEA
Seattle
TMS
São Tomé Island
$7,397 Roundtrip, found 5 days ago
$7,397
Roundtrip
found 5 days ago
Select TAP Portugal flight, departing Sat, Dec 27 from Seattle to São Tomé Island, returning Sat, Jan 3, priced at $7,397 found 5 days ago

Alternative airports near São Tomé

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Sao Tome Intl. TMS. Cheapest option available. Flights from $1,543
TMS
Sao Tome Intl.
Cheapest
Flights from $1,543

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Sao Tome Intl. Airport (TMS) cost?
Lock in a cheap one-way flight from $1,226 or cheap return flight from $1,462 from Seattle - Tacoma Intl. Airport (SEA) to Sao Tome Intl. Airport (TMS) 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 Sao Tome Intl. Airport (TMS)?
Flying in October is a good way to save, as it's the cheapest month for flights between SEA and TMS. You'll often find the lowest prices during the off-season.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Sao Tome Intl. Airport (TMS)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SEA to TMS flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Sao Tome Intl. Airport (TMS)?
There aren't any daily direct flights departing from Seattle - Tacoma Intl. Airport (SEA) to Sao Tome Intl. Airport (TMS). But you can choose flights with layovers. Filter your search results on Expedia to include one or two stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from SEA to TMS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*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 Sao Tome Intl. Airport (TMS)?
To reach Sao Tome Intl. Airport (TMS) on schedule, pick 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 time.**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 Sao Tome Intl. Airport (TMS) last-minute?
Holding off until right before your break to book a ticket from SEA to TMS often results in higher prices. Although you may find some last-minute deals, they aren't always guaranteed. Allow some flexibility in your schedule to maximize your chances of scoring a bargain.
Is it cheaper to book a SEA to TMS flight and hotel package?
You'll generally save money by booking a SEA to TMS flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've chosen your preferred accommodations and flights, you can add extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Sao Tome Intl. Airport (TMS)?
Typically, you can reschedule or cancel your SEA to TMS flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you'd like further information, head to our Customer Service portal.

Travel information

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
São Tomé Intl.
Roundtrip price
$1,461
Distance
7937 mi

Book with confidence

Book with confidence

Seattle to São Tomé Island Flights

The cheapest times to fly from Seattle to São Tomé Island

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 São Tomé Island are during the month of October. You can find some of the cheapest flights from Seattle to São Tomé Island with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to São Tomé Island

Sunday is one of the best days to book for cheap flights from Seattle to São Tomé Island: 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 São Tomé Island

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 São Tomé Island in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,226 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 São Tomé Island 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 São Tomé Island 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 São Tomé Island Flights
*Available to One Key members.