(CNN) -- At least 12 airplanes shared the trans-Atlantic sky with doomed Air France Flight 447, but none reported any problems, deepening the mystery surrounding the cause of the plane's disappearance.
Airlines confirmed that at least a dozen aircraft departed roughly at the same time and traversed approximately the same route, but did not report problematic weather conditions.
All of these flights took a similar route toward Paris, heading first toward Recife on the east coast of Brazil and then continuing northeast over the Atlantic. None of the other flights experienced anything unusual, the spokesman said. All arrived in Paris the next day, with no significant delays of any kind.
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