A little more than a year ago air fares at Savannah/Hilton Head International Airport were tied for the fourth highest air fares at the country's top 100 airports. A recently released Bureau of Transportation Statistics' numbers for the second quarter of this year show fares at Savannah's airport have dropped 13.7 percent to 25th most expensive, reports Savannah Morning News. A big reason, the paper says, is JetBlue's arrival. In anticipation of JetBlue's arrival in February of 2014, Delta Air…