The cheapest times to fly from BWI to SLU are

  • January 8th to February 11th
  • May 14th to July 1st
  • September 3rd to December 9th (except the week of September 17th)

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 SLU is mid May. Prices can be as high as $2310 for Sunday flights during late July, or as low as $631 for Tuesday flights around mid May.


When to Fly to Saint Lucia

Flying from Baltimore, MD (BWI) to St. Lucia (SLU) will usually cost between $674 to $1248 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid May with an average ticket price of $675. Due to high demand the most expensive time to fly is late July, with an average price of $1565. Planning your trip to low-cost times can easily save you $889 on economy flights and even more on first-class flights. Generally, any price below $818 can be considered a good price for a round-trip BWI to SLU flight.

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

BWI to SLU Flight Prices

Compared to other flights, the BWI to SLU flight is cheaper than the average and costs less than the average flight leaving from Baltimore. The average price per mile (for a direct flight) is $0.26, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to fly to SLU, and Friday the cheapest day to fly back into BWI. Sundays are the most expensive days to fly to Saint Lucia, and Wednesdays are the most expensive days to return to Baltimore. Selecting flights on the least expensive days could save you up to $573 (28%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $795. Return trip prices are from the SLU 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 SLU can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 4 hour 33 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from BWI to SLU while comparing.

Destination alternative #1: Grantley Adams International Airport (BGI) in Barbados/Bridgetown

  • 120 miles (193 km) away from SLU
  • Usually 31.13% less expensive than SLU
  • 1-layover flights available

See BWI to BGI flights

Destination alternative #2: Hewanorra International Airport (UVF) in St. Lucia

  • 20 miles (32 km) away from SLU
  • Usually 26.54% less expensive than SLU
  • 1-layover flights available

See BWI to UVF flights

Destination alternative #3: Maurice Bishop International Airport (GND) in Grenada

  • 149 miles (240 km) away from SLU
  • Usually 23.30% less expensive than SLU
  • 1-layover flights available

See BWI to GND flights

Destination alternative #4: E. T. Joshua Airport (SVD) in St. Vincent

  • 62 miles (100 km) away from SLU
  • Usually 0.49% less expensive than SLU
  • 1-layover flights available

See BWI to SVD flights


Flight Hacking BWI to SLU

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 SLU — but Champion Traveler does!

Hack #1: Port of Spain (BWI > POS > SLU)

  • Price for both tickets: $786
  • Average savings: $32 (3.85%)

See BWI to POS flights

Hack #2: Fort Lauderdale, FL (BWI > FLL > SLU)

  • Price for both tickets: $815
  • Average savings: $3 (0.31%)

See BWI to FLL flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 9 major airlines flying this route most often: Air Canada, Air France, Caribbean Airlines, Delta, JetBlue, LIAT, Qantas, United, WestJet, and potentially more during busy seasons.

How far away is it from George F Charles Airport to Baltimore/Washington International Thurgood Marshall Airport?

The distance between the two airports is roughly 1982 miles or 3190 kilometers.

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

The real-world flight time for a nonstop BWI to SLU flight is about 4 hour 33 minutes.

How many flights go between Baltimore, MD and St. Lucia?

It depends on the day of the week and the date, but a typical day might have around 34 available flights from BWI to SLU.


Airport Location Info


Departing Airport

Origination codeBWI
Origination airport nameBaltimore/Washington International Thurgood Marshall Airport
CityBaltimore, MD
Countrythe United States

Return Airport

Destination codeSLU
Destination airport nameGeorge F Charles Airport
CitySt. Lucia
CountrySt Lucia


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.