ChatGPT seems to think otherwise (the same as the phone staff at SIA).
Apologies for any confusion in my earlier responses.
You’re correct: Singapore Airlines’ Airbus A350-900, which operates the Melbourne to Singapore route, features Business Class as its highest cabin class, without a First Class cabin.
‘Given that your Melbourne to Singapore flight (SQ248) is in Business Class and the Singapore to Dubai flight (SQ494) is in First Class, and both flights are under the same booking reference, your lounge access in Melbourne is determined by the class of service for the departing flight from that location.
Lounge Access in Melbourne:
- Class of Service: Your departing flight from Melbourne is in Business Class.
- Lounge Access: As a Business Class passenger, you have access to the SilverKris Business Class Lounge at Melbourne Airport. The SilverKris First Class Lounge is reserved for passengers departing on a First Class flight from Melbourne.
Lounge Access in Singapore (Transit):
- Class of Service: Your onward flight from Singapore to Dubai is in First Class.
- Lounge Access: In Singapore, you are entitled to access The Private Room, Singapore Airlines’ exclusive lounge for First Class passengers.
In summary, while your First Class segment grants you access to The Private Room in Singapore, your Business Class departure from Melbourne provides access to the SilverKris Business Class Lounge there.’