OK, so Im no noob to taking limos. Pretty much use them all the time for airport runs here in Chicago. Though I was thinking about this today as Im getting ready to head out to Vegas tomorrow. I normally tip the limo/car driver $25 each way for the airport run in Vegas. Presidential limo charges $99. This means that Im basically tipping the driver 50% which seems high. Anyway, I was wondering what others tip the driver.