JetBlue is hiking its baggage fees to counter higher fuel costs sparked by the Iran war – potentially a taste of things to come from major US airlines as the cost of oil soars above $100 a barrel.Airlines have been charging hundreds more for tickets as the conflict disrupts global energy supplies, since fuel is typically airlines’ biggest cost along with labor – but JetBlue’s announcement appeared to mark the first sign that carriers could start passing along higher costs in the form of flight add-ons.“As w ...