The number of domestic passengers going through Auckland Airport increased by 7.9 percent last month compared to April 2009, while international arrivals remained flat.
In its monthly traffic update for April released today, the airport said there were 512,108 domestic travellers, up from 474,627 a year earlier, while the rolling 12-month total gained 5.4 percent to 6.17 million.
International passenger traffic volumes, including transits, were flat against the corresponding year despite European long haul travel being impacted by restrictions on flight movements due to volcanic ash, the airport said.
There was a 3 percent decline on Australian arrivals versus April 2009, but combined growth for March and April 2010 was 6.2 percent.
The number of travellers from the United Kingdom took the biggest blow with 19.8 percent fewer compared to the same period last year, with 11,914.
Behind was the United States, with 8.8 percent fewer passengers going through the airport.
Korean arrivals however, hiked 24.5 percent to 3869 "on the back of increases in seat availability in the South Korean market," the airport said.
Auckland Airport also saw 48.3 percent more passengers from Thailand, from 2682 last month compared to 1809 in April 2009.
Domestic aircraft movement was slightly down 0.4 percent to 9526, after being up for two months in a row, and the 12-month rolling total was down 4.7 percent.
International aircraft movement lifted 7.3 percent to 3500 from 3262, and the 12-month rolling total was up 4.8 percent.