The cheapest times to fly from BOI to GST are

  • May 21st to July 15th (except the weeks of June 25th and July 2nd)
  • August 6th to August 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 GST is mid August. Prices can be as high as $831 for Friday flights during late July, or as low as $559 for Thursday flights around mid August.


When to Fly to Gustavus

Flying from Boise, ID (BOI) to Gustavus, AK (GST) will usually cost between $559 to $777 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid August with an average ticket price of $559. Due to high demand the most expensive time to fly is late July, with an average price of $759. Planning your trip to low-cost times can easily save you $200 on economy flights and even more on first-class flights. Generally, any price below $561 can be considered a good price for a round-trip BOI to GST flight.

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

BOI to GST Flight Prices

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


Flight Prices by Day of the Week

Thursday is usually the cheapest day to fly to GST, and Wednesday the cheapest day to fly back into BOI. Fridays are the most expensive days to fly to Gustavus, and Thursdays are the most expensive days to return to Boise. Selecting flights on the least expensive days could save you up to $42 (7%) 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 $573. Return trip prices are from the GST 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 GST can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 3 hour 22 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 GST while comparing.

Destination alternative #1: Juneau International Airport (JNU) in Juneau, AK

  • 41 miles (66 km) away from GST
  • Usually 19.16% less expensive than GST
  • 1-layover flights available

See BOI to JNU flights

Destination alternative #2: Sitka Rocky Gutierrez Airport (SIT) in Sitka, AK

  • 96 miles (154 km) away from GST
  • Usually 5.88% less expensive than GST
  • 1-layover flights available

See BOI to SIT flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 1 major airline flying this route most often: Alaska, and potentially more during busy seasons.

How far away is it from Gustavus Airport to Boise Air Terminal Airport?

The distance between the two airports is roughly 1321 miles or 2126 kilometers.

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

The real-world flight time for a nonstop BOI to GST flight is about 3 hour 22 minutes.

How many flights go between Boise, ID and Gustavus, AK?

It depends on the day of the week and the date, but a typical day might have around 17 available flights from BOI to GST.


Airport Location Info


Departing Airport

Origination code BOI
Origination airport name Boise Air Terminal Airport
City Boise, ID
Country the United States
Latitude 43.6
Longitude -116.2

Return Airport

Destination code GST
Destination airport name Gustavus Airport
City Gustavus, AK
Country the United States
Latitude 58.4
Longitude -135.7


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.