The number of passengers flying Ryanair has soared 12 per cent, with 9.55m traveling on the Irish airline in September, compared with 8.49m last year.
Load factors - how many seats were filled - increased four percentage points to 94 per cent.
"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," said Ryanair marketing chief Kenny Jacobs.
Rolling annual traffic - the number of passengers who have travelled with the carrier so far this year - now stands at 97.3m customers, a rise of 16 per cent on the previous year.
Ryanair said it will continue to introduce new services such as car hire and embark on a makeover of its plane interiors in a bid to woo customers beyond cheap air fares.