QantasLink had the highest cancellation rate of all domestic airlines in May as weather and technical issues took their toll.
The regional carrier suspended 2.2% of its scheduled flights, a total of 209 services.
"A number of factors including weather and some technical issues resulted in the cancellation of 2.2% of QantasLink services in May 2012," a Qantas spokesperson said.
"Customers impacted by cancellations were contacted by QantasLink as soon as possible and in most cases customers travelled on the next available service."
Virgin Australia had the second worst cancellation rate with 1.3% of its schedule cancelled, a total of 151 services, while Skywest had no cancellations at all.
Overall cancellations were highest on the Canberra-Sydney route with 4.5% of all services cancelled, followed by Sydney-Canberra with 4.1%.
Tiger Airways remained the most punctual airline for departures with 90.1% on time, with Qantas second with 89.5%, then Virgin with 87.5%.
But Tiger slipped into second place for arrivals with 87.6%, lagging behind Qantas’ 88.1%. Virgin came third with 85.9%.
Jetstar came fourth for both departures and arrivals with 79.6% and 79.4% respectively.
Of the regional carriers, Virgin Australia’s ATR/F100 operations came top for departures with 88% while Regional Express had the most punctual arrivals with 87.5%.
Melbourne to Darwin was most punctual for departures with 97.7% on schedule, while the return service was top for arrivals with every service on time.
Meanwhile, just 53.2% of departures on the Darwin-Brisbane route were on time pushing it to the bottom of the tables, where it was joined by Townsville-Cairns, the least punctual for arrivals at 58.9%.
