Try to check in online if your airline offers it. That will give you an extra 30 minutes at HLH.
If you are checked in online, you need to be there about 90 minutes before departure. So, I'd leave at 10:15-10:30am.
If you have to get in line, I'd leave about 9:45am.
Either way, you have time to knock one out. If you want to have a little more time so not to have to rush, speak to a chica you like and ask if she can come in a little earlier that day, maybe 8:30. Offer her a monetary incentive (but don't give her anything in advance, not until you actually see her that morning
).