Qantas has the BEST on time performance. Simple facts.
Yes that's true, (if you ignore Tiger Airways for the last 5 months). A few coments though:
1. OTP is a self assessed industry benchmark. Watch Virgins OTP sky rocket when it get ACARS and click off the park brake with one minute to go to pushback within 15 mins like Qantas often do.
2. Virgin flys to more destinations than Qantas. If Qantas flew to more destinations, that Jetstar fly and Qantaslink fly to, I think it would be interesting to see Qantas OTP then. For example May 2012, Jetstar and Qantaslink were 79.4% and 75.8% respectively.
3. As far as the routes that both Qantas and Virgin fly on Qantas are ahead 34 to 22. Watch that number come a lot closer when Virgin get more gate room in Sydney and Perth.