i find it incredible, that Ralf (a constant world traveller) would scew up & mis-book his flight out. i will also say that FRI nights are THE WORST to fly out of Vegas & require a minimum 2hrs before departure.
the only plausible reason i can discern, is that he took that flight, because he booked w/ skymiles & that's all that was available? but - likewise, when you change flights w/ skymiles, it's only a $150 change fee & no fare difference (might be $200 now). period.
so, if he paid for the ticket & needed to change, it'd be the change fee plus fare difference, or a new one-way ticket. approx $1500. this, is where skymiles really come into play. and i'd guess Ralf has at least 500K skymiles.
now, throw in the rumors of "whole/partial ëxpenses covered by CSI".
if, his flight story is true, then this probably cost him a lot more than a one-way ticket. unless he had a bigger reason to leave.... and he might should have simply called-in sick w/ food poisoning.