The cheapest times to fly from BOI to GTF are

  • January 8th to March 11th (except the weeks of February 5th and February 12th)
  • April 30th to May 13th
  • July 2nd to July 29th (except the week of July 16th)
  • October 15th to December 9th (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 GTF is early December. Prices can be as high as $616 for Friday flights during mid December, or as low as $194 for Tuesday flights around early December.


When to Fly to Great Falls

Flying from Boise, ID (BOI) to Great Falls, MT (GTF) will usually cost between $214 to $458 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early December with an average ticket price of $231. Due to high demand the most expensive time to fly is mid December, with an average price of $505. Planning your trip to low-cost times can easily save you $274 on economy flights and even more on first-class flights. Generally, any price below $296 can be considered a good price for a round-trip BOI to GTF flight.

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

BOI to GTF Flight Prices

Compared to other flights, the BOI to GTF flight is much cheaper than the average and costs much less than the average flight leaving from Boise. The average price per mile (for a direct flight) is $0.51, which is above average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays 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 $83 (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 $255. Return trip prices are from the GTF 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 GTF can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 1 hour 38 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 GTF while comparing.

Destination alternative #1: Bert Mooney Airport (BTM) in Butte, MT

  • 118 miles (190 km) away from GTF
  • Usually 4.05% less expensive than GTF
  • 1-layover flights available

See BOI to BTM flights

Destination alternative #2: Bozeman Yellowstone International Airport (BZN) in Bozeman, MT

  • 118 miles (190 km) away from GTF
  • Usually 2.36% less expensive than GTF
  • 1-layover flights available

See BOI to BZN flights


Flight Questions Answered

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

Which airlines fly this route?

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

How far away is it from Great Falls International Airport to Boise Air Terminal Airport?

The distance between the two airports is roughly 358 miles or 576 kilometers.

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

The real-world flight time for a nonstop BOI to GTF flight is about 1 hour 38 minutes.

How many flights go between Boise, ID and Great Falls, MT?

It depends on the day of the week and the date, but a typical day might have around 57 available flights from BOI to GTF.


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 GTF
Destination airport name Great Falls International Airport
City Great Falls, MT
Country the United States
Latitude 47.5
Longitude -111.4


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.