The Huffington Post – On most trips to Las Vegas, the party starts long before hitting the Strip… and apparently even before hitting the airport landing strip. In May, passengers on Vegas-bound flights spent over twice as much on drinks than the average passenger, a survey found. Technology group GuestLogix reviewed data from six North American airlines to determine spending patterns among travelers. Check out some of the most intoxicating findings: Of all product sales made on flights, 62% were beverage sales. Of those beverages, 55% were liquor, 24% were wine, and 20% were beer. On an average flight, airlines…