With two air carriers competing for business, the Paro-Bangkok air fare has evened out giving passengers something to smile about.National airline Drukair is charging Nu 10,500, exclusive of taxes, for a round trip economy class ticket to Bangkok from Paro.A ticket with private airline Bhutan Airlines (Tashi Air) is going for Nu 10,399, also exclusive of taxes, for the same sector and class.Both airfares are about 50 percent of the normal airfare, which is about Nu 21,000.