The cheapest times to fly from BWI to TMS are

  • mid January
  • February 12th to April 22nd
  • August 13th to December 9th (except the weeks of August 20th and October 29th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from BWI to TMS is late November to early December. Prices can be as high as $7261 for Saturday flights during late December, or as low as $1604 for Thursday flights around late November to early December.


When to Fly to São Tomé

Flying from Baltimore, MD (BWI) to Sao Tome Island (TMS) will usually cost between $3097 to $4439 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late November to early December with an average ticket price of $2917. Due to high demand the most expensive time to fly is late December, with an average price of $5556. Planning your trip to low-cost times can easily save you $2639 on economy flights and even more on first-class flights. Generally, any price below $3632 can be considered a good price for a round-trip BWI to TMS flight.

See below for a graph of average weekly prices for the BWI to TMS route. All prices are for round-trip tickets in USD.

BWI to TMS Flight Prices

Compared to other flights, the BWI to TMS flight is more expensive than the average and costs more than the average flight leaving from Baltimore. The average price per mile (for a direct flight) is $0.39, which is a bit above average.


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to TMS, and Tuesday the cheapest day to fly back into BWI. Saturdays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $640 (15%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Thursday and returning a week later will cost an average of $3628. Return trip prices are from the TMS to BWI flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from BWI to TMS can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 11 hour 30 minutes may not be realistic.


Flight Hacking BWI to TMS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from BWI to TMS — but Champion Traveler does!

Hack #1: Lisbon (BWI > LIS > TMS)

  • Price for both tickets: $1337
  • Average savings: $2295 (63.19%)

See BWI to LIS flights

Hack #2: Accra (BWI > ACC > TMS)

  • Price for both tickets: $1377
  • Average savings: $2255 (62.09%)

See BWI to ACC flights

Hack #3: Washington, DC (BWI > IAD > TMS)

  • Price for both tickets: $2093
  • Average savings: $1539 (42.37%)

See BWI to IAD flights


Flight Questions Answered

Still have questions about flying from BWI to TMS? We’ve got answers.

Which airlines fly this route?

You can find 4 major airlines flying this route most often: American, Delta, Tap Air Portugal, United, and potentially more during busy seasons.

How far away is it from Salazar Airport to Baltimore/Washington International Thurgood Marshall Airport?

The distance between the two airports is roughly 5847 miles or 9410 kilometers.

How long does it take to fly from BWI to TMS?

The real-world flight time for a nonstop BWI to TMS flight is about 11 hour 30 minutes.

How many flights go between Baltimore, MD and Sao Tome Island?

It depends on the day of the week and the date, but a typical day might have around 37 available flights from BWI to TMS.


Airport Location Info


Departing Airport

Origination code BWI
Origination airport name Baltimore/Washington International Thurgood Marshall Airport
City Baltimore, MD
Country the United States
Latitude 39.2
Longitude -76.7

Return Airport

Destination code TMS
Destination airport name Salazar Airport
City Sao Tome Island
Country Sao Tome and Principe
Latitude 0.4
Longitude 6.7


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.