With demand taking off, global airlines just raised their profit forecast to $30.5 billion for the year. All as they prepare for about five billion passengers, as noted by the International Air Transport Association. That’s just over 11% higher than last year’s numbers. All of which should fuel undervalued airline stocks.Additionally, travel demand is only getting stronger. According to TripAdvisor, “Americans and travelers around the world continue to place a high priority on summer vacations, according to ...