Ireland forecasts 800,000 will pass through Dublin Airport, over the St Patrick's day period.
However, Tourism Ireland's plans with international partners elswhere will remain muted, as the Irish government asks that landmarks not be lit green this year.
Buoyed by easing restrictions, unique circumstances that have led to back-to-back public holidays on Thursday and Friday, the Republic's capital is looking to see almost a million travellers and the first official St Patrick's Day celebrations for three years.
"This coming 12- day period is expected to be the busiest the airport has seen since before Covid," said the international airport in a statement on Monday.
77000 passengers a day will pass through the terminals at peak times.
St Paddy's will be a post-pandemic celebration. The airport which is sponsoring Dublin's festival has set the theme of "connections", and is hoping that leisure travel and reunions will be as widespread across the weekend as shamrocks.
While celebrations in Ireland are building up to fever pitch there's one tradition that will not return in 2022.
The Global Greening, which last year saw the Auckland Sky Tower and a record 725 landmarks lit up green, will not be held this year.