April air transactions processed by mega travel agencies and settled through ARC rose 1.1 percent year over year,

according to ARC. Mega agencies include American Express, BCD Travel, Carlson Wagonlit Travel, Egencia, HRG and Omega World Travel. Online travel agencies last month witnessed a 10 percent year-over-year rise in ARC air transactions, while the group of travel agencies classified by ARC as "other" posted a 4.6 percent increase. In total, U.S. travel agency air ticket transactions in April rose 5.6 percent year over year, according to ARC.