The cheapest times to fly from BOI to STT are

  • January 1st to February 25th (except the week of February 12th)
  • July 30th to December 16th (except the week of November 19th)

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 BOI to STT is late October. Prices can be as high as $1671 for Sunday flights during late December, or as low as $631 for Tuesday flights around late October.


When to Fly to Saint Thomas

Flying from Boise, ID (BOI) to Charlotte Amalie, VI (STT) will usually cost between $695 to $1238 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October with an average ticket price of $685. Due to high demand the most expensive time to fly is late December, with an average price of $1255. Planning your trip to low-cost times can easily save you $570 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 BOI to STT flight.

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

BOI to STT Flight Prices

Compared to other flights, the BOI to STT flight is cheaper than the average and costs about as much as the average flight leaving from Boise. The average price per mile (for a direct flight) is $0.15, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays 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 $262 (24%) 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 $760. Return trip prices are from the STT to BOI 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 BOI to STT can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 7 hour 9 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 BOI to STT while comparing.

Destination alternative #1: Luis Munoz Marin International Airport (SJU) in San Juan, PR

  • 68 miles (109 km) away from STT
  • Usually 21.65% less expensive than STT
  • 1-layover flights available

See BOI to SJU flights

Destination alternative #2: Princess Juliana International Airport (SXM) in Philipsburg

  • 124 miles (200 km) away from STT
  • Usually 3.61% less expensive than STT
  • 1-layover flights available

See BOI to SXM flights

Destination alternative #3: Henry E. Rohlsen Airport (STX) in Christiansted, VI

  • 45 miles (72 km) away from STT
  • Usually 3.49% less expensive than STT
  • 2-layover flights available

See BOI to STX flights


Flight Hacking BOI to STT

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 BOI to STT — but Champion Traveler does!

Hack #1: Los Angeles, CA (BOI > LAX > STT)

  • Price for both tickets: $708
  • Average savings: $110 (13.39%)

See BOI to LAX flights

Hack #2: Denver, CO (BOI > DEN > STT)

  • Price for both tickets: $732
  • Average savings: $86 (10.52%)

See BOI to DEN flights

Hack #3: Orlando, FL (BOI > MCO > STT)

  • Price for both tickets: $758
  • Average savings: $60 (7.34%)

See BOI to MCO flights


Flight Questions Answered

Still have questions about flying from BOI to STT? We’ve got answers.

Which airlines fly this route?

You can find 7 major airlines flying this route most often: Alaska, American, Cape Air, Delta, Seaborne Airlines, Silver Airways, United, and potentially more during busy seasons.

How far away is it from Cyril E King Airport to Boise Air Terminal Airport?

The distance between the two airports is roughly 3430 miles or 5520 kilometers.

How long does it take to fly from BOI to STT?

The real-world flight time for a nonstop BOI to STT flight is about 7 hour 9 minutes.

How many flights go between Boise, ID and Charlotte Amalie, VI?

It depends on the day of the week and the date, but a typical day might have around 75 available flights from BOI to STT.


Airport Location Info


Departing Airport

Origination codeBOI
Origination airport nameBoise Air Terminal Airport
CityBoise, ID
Countrythe United States

Return Airport

Destination codeSTT
Destination airport nameCyril E King Airport
CityCharlotte Amalie, VI
Countrythe United States


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.