Ryanair's April traffic statistics show that they flew 12.3 million customers last month.
That is a 9% rise in customers from April last year.
The numbers mean that up to the end of April they had 131.4m customers, in increase of 8% on the same period in 2017.
Ryanair’s Kenny Jacobs said: "Ryanair’s April traffic grew, while our load factor remained strong at 96%, on the back of lower fares.
"Ryanair customers can look forward to more low fares and an improved customer experience in 2018 as we roll out more AGB improvements.”