By Kyle Arnold The Dallas Morning News American Airlines plans to buy a minority stake in a second South American airline, Brazil’s Gol, as it aims to strengthen its ties to its strongest international region. American plans to spend $200 million on the 5.2 percent interest in São Paulo-based Gol, an ultra-low-cost carrier that flies throughout South American but is strongest in Brazil, American announced Wednesday morning. American and Gol have been engaged in a codesharing deal since February 2020, allowing the two sides to sell tickets on each other’s routes and letting customers seamlessly transfer flights between the two entities. The partnership comes less than two months after American Airlines announced it planned to buy a minority stake in another South American ultra-low-cost carrier, JetSmart out of Chile. JetSmart has the same private equity majority owner, Indigo Partners, as U.S. competitor Frontier Airlines. American Airlines also has a small …