Just got back in from Vegas. I usually fly direct to and from Vegas. But since I didn't book this go around, my return flight was connecting in SF. One thing that dawned on me when in the air from SF back to Houston. Why does it take 3.5 hours from Houston to Vegas, but it only takes 3 hours (2 hours and 50 min actual flight time)? Kinda puzzling to me since I have been to Vegas about a dozen times and the flight time is always the same time. SF is at least I'm guess 4-5 hundred miles northwest of Vegas but yet it's faster from SF to Houston? Jet stream? Different plane? Different route? I believe the mileage is more when going to the SF route.