I have travelled Jetstar many times Perth to Singapore to Manila.
They can and will do baggage transfer so that you do not have to worry about going in and out of the transit area, customs, immigration, etc.(however they can not always do it e.g. if different booking numbers means it is not a given)
Option 1 - they give you the boarding pass for both flights at point of departure - this is the best option
Option 2 - on arrival at Singapore you go to the allocated Jetstar transfer counter (normally Counter C at T1 which is where Jetstar normally land) within the Transit area and get your new boarding pass
Option 3 - you may be unlucky and have to go out of Transit and get a new boarding pass, keeping in mind that you can not get a boarding pass for your new flight until 3 hours prior to the flight (this is if they will not do baggage transfer) If you have to use option 3 then you may get stuck in the Arrivals area for a while
If you have to do down time at any airport Transit area at least Changi is a good choice as they have plenty to do
- if your transits is more than 3 hours then you can do one of the city tours....no need to clear immigration as it is all arranged in the Transist area
- movie theatre
- sleeping lounges (Use the one half way down T1 C as it is very quiet)
- free wifi
- many more , just grab a Changi Airport guide at one of the information counters
Another tip especially if on a tight time frame to get a boarding pass if you have to go out of the Transist area - if the immigration area is full for the terminal you come into e.g. T1 then catch a quick skytrain trip to T2 or T3 and go through immigration there and then go back to get your boarding pass.......especially if you land behind 2 or 3 bigger plane international flights
Singapore Changi airport is one of the most efficient I have experienced, so if you have to do a tight connection time frame then your delays are unlikely to be at the airport, but more likely a late departure of your original flight.
I have missed a Jetstar flight at Singapore due to the late arrival of a prior non-Jetstar flight.......Jetstar put me on the next flight for a Au$75 fee.....and my original booking was a very very basic cheap ticket....so not bad at all
Edited by Kadachiman, 10 August 2018 - 12:26 AM.