The full-service carrier Vistara on Thursday said its traffic grew by a healthy 80 per cent in the January-April period while it recorded a 7 percentage points increase in its average load factor to 82 per cent. The Tata-Singapore Airlines joint venture also increased its fleet capacity by 44 per cent in the period, airline said, adding it will increase its weekly flights by 30 per cent, taking the total to over 700 flights a week.