Asia - SGN domestic arrival transfer time to Int'l?

Hi:
Mrs. Mo and I are traveling from DAD arriving SGN on Jet Star at 13:45.

We are connecting to SQ (in C) from SGN to SIN. Will are not planning on checking baggage. Will we have enough transfer time? Will we have enough time if we have to check baggage from DAD to SGN? Thank you in advance...

Uh, what time is your SQ flight leaving?

Uh, what time is your SQ flight leaving?

Whoops!

1500 SQ flight to SIN.

Seems rather tight to me. Jetstar could well be a bit late... Can you check-in online with SQ? Else you don't have much time to check-in at SGN.