Revenues for the world's number two outdoor company were €454m (£313.6m) for the second quarter, up 5% on €432.2m a year ago.
The contrast between the two quarters is greater when looking at the company's organic revenue growth, which more than halved from 7.3% to 3.2%.
The company blamed the decrease in growth on the UK billboard market and weaker advertising conditions in France.
Its second-quarter global revenues from billboards shrank by 2.8% year-on-year to €115.4m.
Jean-Francois Decaux, chairman and co-chief executive, said: "Our good performance over the half year was driven by solid street furniture revenue growth and continued double-digit revenue improvement from our transport division."
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