Phoenix Sky Harbor International airport recorded a 9% rise in passenger throughput during the month of August.
The growth mirrors the 9.2% rise in passengers travelling through the airport recorded in July and an improvement over the 6.3% increase posted in June.
In a statement the airport explained July and August are typically busy for the airport.
Between January and August 27 million passengers travelled through the airport, a 6.1% rise versus the year prior.
Phoenix serves as a hub for US major US Airways, which had a 38% market share at the airport from July 2010 through June 2011, according to data collected by the US Department of Transportation. Southwest also has a significant presence in Phoenix, holding a 32% market share.