Total U.S. travel agency air transactions processed through ARC in May fell by almost 1 percent year over year, the fourth consecutive month of declining volume

, while total sales increased nearly 6 percent, according to ARC data. International fare sales (up 5.7 percent year over year) grew more than domestic fare sales (up 3.3 percent), but international transaction volume dropped more than 2 percent, compared to the 0.5 percent domestic decline.