Cheap Flights from Boise to Williston, ND, United States - BOI to ISN Last modified: Jul 1, 2016 6:47 AM
When Can I Buy the Cheapest Flight from Boise to Williston (BOI to ISN)?
Airlines can adjust prices for plane tickets from Boise to Williston based on the day and time that you decide to book your flight. We have collected data from all airlines, and have discovered that the best days to book flights are Tuesdays, Wednesdays, and Saturdays. Read our article to find more information about the best time to buy airline tickets.