Almost 100 domestic or international services travelling from Sydney having been delayed or cancelled. Almost 100 domestic or international services travelling from Sydney having been delayed or cancelled. Credit: Christian Gilles / News Corp AustraliaFlights between Perth and Sydney have largely avoided the major delays affecting Sydney airport today. This is despite almost 100 domestic or international services travelling from Sydney having been delayed or cancelled. Qantas has reported 50 delays and four cancellations, while Jetstar and Virgin Australia have also been affected, with 20 and 25 delays respectively.