Severe weather and the closure of a runway for repairs contributed to Perth Airport recording the worst on-time arrival performance of any capital city airport in August.
Only 74 per cent of flights arrived on time, according to the Bureau of Infrastructure, Transport and Regional Economics Domestic Airline On Time Performance report released yesterday.
The report measures the performance of scheduled airlines from major cities that account for 95 per cent of traffic but not fly-in, fly-out charters.
An Airservices spokesman said yesterday that "during the month of August a number of issues impacted on our operations at Perth Airport, which caused an increase in delays".
"These included a series of significant weather events throughout the month including heavy rain, low cloud, reduced visibility and wind shear, as well as runway maintenance works, requiring the use of single runway operations," he said.
"These impacted the arrival and departure of flights at Perth Airport."
The spokesman said "Airservices continues to work collaboratively with Perth Airport and the airlines under the Airport Capacity Enhancement program to manage the best outcomes for demand and capacity at Perth Airport".
The ACE program puts into action a suite of recommendations from British air traffic control provider NATS to increase the capacity of the runways and could, in a best case scenario, lift capacity 15 per cent.
Perth Airport chief executive Brad Geatches said that "no other airport in Australia experiences the peaks in demand that Perth does, due to the resource sector's workforce deployment requirements".
"Since the implementation of the Schedule Co-ordination System on March 31, Perth Airport's on-time performance reached an average of 81.3 per cent, making Perth Airport fourth to Adelaide, Canberra and Hobart," he said.
"On average, arrivals delays have decreased by approximately 60 per cent post-implementation of schedule co-ordination."Perth Airport has also implemented or is well progressed in delivering each of the recommendations from the UK NATS report it has responsibility for, which will also improve the effectiveness and efficiency of traffic flows and overall airport performance and runway throughput."