![US Travel Industry Online Ad Spending By Channel, 2014 [CHART]](http://www.emarketer.com/images/chart_gifs/172001-173000/172150.gif "Chart - US Travel Industry Online Ad Spending By Channel")
eMarketer estimates that mobile spending will make up 35.5% of the US travel sector’s $4.15 billion in digital ad investments in 2014 as travel marketers make changes to deal with high mobile device usage. Because of the relative newness of mobile compared with other digital advertising formats, marketers will experiment with a variety of mobile ad units in 2014, including search, mobile video and mobile app advertising. Read the rest at eMarketer.
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