Re: SIN - If you're on what appears to be the sole departure from SIN (DL1066) at 0645, perhaps consider bagging what's described to be an unsatisfying lounge visit - if you can even get in at all - and stay at the airport Crowne Plaza the evening before you depart? I stayed there last November, slept-in a bit and my travel time was 5-8 minutes all-in from the hotel's direct access entrance into Terminal 3 to the DL check-in in Terminal 1 via a non-stop 60-90 second train ride between T3/T1.