However, the increase was driven almost entirely by favourable exchange rate movements, which boosted its international revenues by $25.1m.
The outdoor media company's US revenues remained flat as income lost due to the disposal of its Taxi Media operation offset posters and airport revenue increases.
International revenues were also flat, but the company noted increased revenues from street furniture across several countries and from billboards in the UK.
The company made a net loss of $47.8m, reduced substantially from $87.9m in the same quarter in 2009.
Its operating loss was $2.9m, down from $26.7m last year.
Mark Mays, CEO of Clear Channel Outdoor, said: "Our first quarter results reflect the market leadership of our asset base in an improving advertising environment, as well as the positive impact of our restructuring initiatives."
The company has spent $92.7m on its restructuring programme since it was announced in the fourth quarter of 2008. Operating expenses have been reduced by 1% between the first quarters of 2009 and 2010, or 6% when excluding exchange rate changes.
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