Aer Lingus Regional, operated by Stobart Air, experienced its best month on record in July since the franchise began in March 2010.
The record passenger numbers beats the previous record set only last month.
The airline carried 141,737 passengers in July, a 22pc increase on the same month in 2013.
This marks the 13th consecutive month of passenger growth as all of the airline's Irish bases reported growth. Over 762,000 passengers have flown with Aer Lingus Regional since the start of the year, up 25pc.