I have to agree that if you feel like say ILY then you should when its appropriate. Not all the time but if you feel its okay then go for it.
I know my H travels for bus quite often and I tried to give him a hug before his last cross country trip as I often wonder the same things about plane flights etc. But he wasn't really into to it so I didn't push it. Next time I just told him to have a safe flight.
Me: 30 EX-H: 37 DD: 5 Separated 6/07. MC for months, EX-H quit MC. Divorce Final 8/14/08. Trying to move on with new life.