United Airlines saw domestic traffic climb substantially as load factors fell in January, according to the carrier's January ops report released Thursday. Domestic traffic climbed a substantial 3.8% year over year with growth coming in both mainline operations (3.8%) and regional operations (3.7%), which had been shrinking for much of 2017. Internationally, traffic dropped a marginal 0.6%, with most of the decline coming from falloffs in the Pacific and Latin American regions. Trans-Pacific traffic was down 2.3% year over year, and Latin American traffic was down 3.8%. The picture was rosier trans-Atlantic, however, where traffic was up 4.3% year over year in what is traditionally a very slow month. United's consolidated traffic in January was up 1.8% year over year. <br/>