Well if it's approximately 3 or so hours from Minnesota to LA, and it's about 14 hours to Sydney/Melb...roughly 17-18 hours in all, not including change over times or time zone changes etc. Have a nice flight!
Ummm... that is a rather vague question. I assume you mean leaving from MSP, but where are you flying to? LAX? SFO? some other city perhaps? Are you flying non-stop? Somewhere around 3-4 hours I...