The cheapest times to fly from BOI to CIU are

  • January 1st to March 18th
  • August 20th to November 18th (except the week of August 27th)
  • early December

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 CIU is mid to late September. Prices can be as high as $1314 for Saturday flights during early August, or as low as $328 for Tuesday flights around mid to late September.


When to Fly to Sault Ste. Marie

Flying from Boise, ID (BOI) to Sault Ste. Marie, MI (CIU) will usually cost between $394 to $771 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid to late September with an average ticket price of $409. Due to high demand the most expensive time to fly is early August, with an average price of $811. Planning your trip to low-cost times can easily save you $403 on economy flights and even more on first-class flights. Generally, any price below $565 can be considered a good price for a round-trip BOI to CIU flight.

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

BOI to CIU Flight Prices

Compared to other flights, the BOI to CIU 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 $0.23, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. 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 $139 (21%) 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 $517. Return trip prices are from the CIU 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 CIU can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 3 hour 47 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 CIU while comparing.

Destination alternative #1: Cherry Capital Airport (TVC) in Traverse City, MI

  • 117 miles (188 km) away from CIU
  • Usually 9.65% less expensive than CIU
  • 1-layover flights available

See BOI to TVC flights

Destination alternative #2: Sawyer International Airport (MQT) in Marquette, MI

  • 140 miles (225 km) away from CIU
  • Usually 6.55% less expensive than CIU
  • 1-layover flights available

See BOI to MQT flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 3 major airlines flying this route most often: Alaska, Delta, United, and potentially more during busy seasons.

How far away is it from Chippewa County International Airport to Boise Air Terminal Airport?

The distance between the two airports is roughly 1554 miles or 2501 kilometers.

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

The real-world flight time for a nonstop BOI to CIU flight is about 3 hour 47 minutes.

How many flights go between Boise, ID and Sault Ste. Marie, MI?

It depends on the day of the week and the date, but a typical day might have around 24 available flights from BOI to CIU.


Airport Location Info


Departing Airport

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

Return Airport

Destination codeCIU
Destination airport nameChippewa County International Airport
CitySault Ste. Marie, MI
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.