Ryanair and Wizz Air both saw surges in passenger carryings in September.
Traffic at the Irish budget carrier grew by 12% year-on-year to a record 9.55 million with the load factor up by four percentage points to 94%.
The September performance means Ryanair’s annual carryings have soared by 16% to 97.3 million.
Chief marketing officer, Kenny Jacobs, said: “These record monthly numbers and load factors are due to our lower fares, our stronger forward bookings and the continuing success of our ‘Always Getting Better’ customer experience programme, which continues to deliver stronger than expected traffic and load factors on our biggest ever summer schedule.”
Central and eastern carrier Wizz Air achieved a 22% increase in passengers last month to 1.8 million over September 2014 with an improved load factor of 90.9%.
The September figure gave the airline a rolling annual total of 18.2 million passengers.