The first BASIS charter school in Northern Arizona, BASIS Flagstaff opened in 2011 to serve 425 students in grades 5–12, adding 4th grade in fall 2015 and 3rd grade in 2016. BASIS Flagstaff now serves 650 students who go to school every day with the best view in all of Flagstaff. Last year, BASIS Flagstaff joined the Arizona Interscholastic Association (AIA), which opened up incredible opportunities for students to participate in sports and other activities.
In the spring of 2016, BASIS Flagstaff received the extraordinary rank of #2 Most Challenging High School in the U.S. by The Washington Post, followed by a #5 ranking in 2017. The BASIS Flagstaff Class of 2017 was a group of highly dedicated, talented students who received a total of $4.8 million in merit aid. Among these 32 students, eight were recognized as National Merit Semifinalists.