Originally Posted by
CPMaverick
Unless I am mistaken, when you arrive at SIN you will be airside. So you can stay airside until you want to leave for Jetstar check-in.
Not when arriving at T4 (CX, KE and many of the LCCs). SIN T4 uses a more classic split level security design.
Like all the airlines at SIN you can utilise early checkin
https://www.jetstar.com/au/en/help/a...early-check-in
Dont see any reason why you couldnt use mobile boarding pass either.