Passenger volumes to and from continental Europe fell by 60%, with more than 491,000 passengers travelling to continental European destinations last month.
UK traffic declined by 57% compared to last year, as more than 373,000 passengers travelled to and from Britain in March.
Passenger volumes to and from North America declined by 53%, with just over 133,000 people travelling on transatlantic routes in March.
Other international passenger traffic, mainly to the Middle East, fell by 40%, with over 43,000 passengers travelling last month. The number of passengers on domestic routes declined by 56%, with just over 3,400 passengers taking domestic flights to and from Dublin last month.
The number of passengers using Dublin Airport as a gateway to connect to another destination declined by 58%, with almost 53,000 passengers connecting through Dublin Airport last month.
Almost 5.2 million passengers have travelled through Dublin Airport in the first quarter of this year, which is a decline of 20% compared to the same period in 2019.