RNS stands for Rennes St Jacques Airport. Codes like this one are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.
Most people fly into Rennes St Jacques (RNS) if they book a flight to Rennes. St Jacques is conveniently located just 6.5 km from Rennes’s city center.
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