City officials announced Monday that March marked the busiest month in the history of Sky Harbor as well as a 3.2 percent increase over the numbers recorded in March 2013.
Phoenix Aviation Director Danny Murphy says spring training, students on spring break and Arizona's weather helped to attract visitors in March.
In the first three months of this year, the airport saw a 3.3 percent increase in passenger numbers compared to the same time period in 2013.
Officials say April statistics for Sky Harbor are not yet available.
Hotels and resorts throughout the valley also saw a nearly 3 percent increase in occupancy in March compared to the same time last year.