$1,018 Cheap Flights from Washington (DCA) to São Tomé Island (TMS)

View $1,018 flight on Tue, Nov 18, 2025Opens in a new window

Popular airlines from Ronald Reagan Washington National Airport (DCA) to São Tomé Island (TMS-São Tomé Intl.)

Cheap Flights from Washington to São Tomé Island (DCA-TMS)

Prices were available within the past 7 days and start at $1,018 for one-way flights and $1,386 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$1,386 Roundtrip, found 7 hours ago
$1,386
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $1,386 found 7 hours ago
United
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$1,405 Roundtrip, found 7 hours ago
$1,405
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $1,405 found 7 hours ago
United
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$1,421 Roundtrip, found 7 hours ago
$1,421
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $1,421 found 7 hours ago
United
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$1,462 Roundtrip, found 7 hours ago
$1,462
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $1,462 found 7 hours ago
United
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$1,481 Roundtrip, found 7 hours ago
$1,481
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $1,481 found 7 hours ago
United
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$1,544 Roundtrip, found 7 hours ago
$1,544
Roundtrip
found 7 hours ago
Select United flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $1,544 found 7 hours ago
Air Canada
Fri, Feb 13 - Sun, Feb 22
DCA
Washington
TMS
São Tomé Island
$1,707 Roundtrip, found 1 day ago
$1,707
Roundtrip
found 1 day ago
Select Air Canada flight, departing Fri, Feb 13 from Washington to São Tomé Island, returning Sun, Feb 22, priced at $1,707 found 1 day ago
TAP Portugal
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$2,078 Roundtrip, found 7 hours ago
$2,078
Roundtrip
found 7 hours ago
Select TAP Portugal flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $2,078 found 7 hours ago
JetBlue Airways
Fri, Nov 14 - Sat, Nov 22
DCA
Washington
TMS
São Tomé Island
$2,111 Roundtrip, found 3 days ago
$2,111
Roundtrip
found 3 days ago
Select JetBlue Airways flight, departing Fri, Nov 14 from Washington to São Tomé Island, returning Sat, Nov 22, priced at $2,111 found 3 days ago
American Airlines
Tue, Nov 18 - Wed, Nov 26
DCA
Washington
TMS
São Tomé Island
$2,113 Roundtrip, found 7 hours ago
$2,113
Roundtrip
found 7 hours ago
Select American Airlines flight, departing Tue, Nov 18 from Washington to São Tomé Island, returning Wed, Nov 26, priced at $2,113 found 7 hours ago

Frequently asked questions

How much does a flight from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS) cost?
Get a cheap one-way flight from $1,018 or cheap return flight from $1,386 from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS)?
Planning your trip for November is a great way to save, as it's the cheapest month for flights between DCA and TMS. You'll usually find the lowest prices during off-peak months.
What is the cheapest airline that flies from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest DCA to TMS flight.
How many flights per day from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS)?
Direct flights from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your dates and pick either "1 Stop" or "2+ Stops."
What day of the week has the most flights from DCA to TMS?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can vary depending on a range of factors, including the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS)?
Opt for a flight from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS) that takes off before 3 PM to reduce the risk of delays and cancellations. Later departures have a 22% higher chance of being canceled, on average.**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 Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS) last-minute?
Holding off until just before your departure to book a flight from DCA to TMS often results in higher prices. While you may come across some last-minute offers, there's no guarantee. Keep your travel schedule open for the best chance of getting a bargain.
Is it cheaper to book a DCA to TMS flight and hotel package?
Compared with arranging hotels and flights separately, booking a DCA to TMS flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one convenient place will take the hassle out of travel planning. Just pick your flights and select from our extensive range of stays, then customize your trip with extras like car rentals and activities.
Can I cancel or change the date of my flight from Ronald Reagan Washington National Airport (DCA) to Sao Tome Intl. Airport (TMS)?
If you booked your DCA to TMS flight within the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

Travel information

Travel information

Origin airport
Ronald Reagan Washington National
Destination airport
São Tomé Intl.
Airlines serving
TAP Portugal
Roundtrip price
$1,386
Distance
5866 mi

Book with confidence

Book with confidence

Washington to São Tomé Island Flights

The cheapest times to fly from Washington 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 Washington to São Tomé Island are during the month of November. You can find some of the cheapest flights from Washington to São Tomé Island with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Washington 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 Washington 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 Washington to São Tomé Island in 2025. You can also book with separate airlines for your outbound and return journeys, from $1,018 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 Washington 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 Washington 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.

 

Washington to São Tomé Island Flights
*Available to One Key members.