Chalks International Air (OP) was a specialized passenger carrier based in Fort Lauderdale, Florida, and operated scheduled seaplane services to the Bahamas. The airlines had its hub at Fort Lauderdale-Hollywood International Airport. Founded by Arthur "Pappy" Chalk, the airline started ad-hoc charter operations as the Red Arrow Flying Service in 1917. Later in February 1919, the airline started scheduled service between Miami and Bimini in the Bahamas, operating as Chalk's Flying Service. After years of operations, airline suspended operations due to the crash of Chalk's Ocean Airways Flight 101 on December 19, 2005.
As of mid-November 2006, the airline was flying from Fort Lauderdale to Key West and to St. Petersburg, Florida, using aircraft "wet leased" from and operated by Big Sky Airlines. Chalk’s added flights between Palm Beach International Airport, but carried just 14 passengers through PBIA in August, 2007. The airline ceased flying from Fort Lauderdale-Hollywood International Airport after September 3, 2007 but, continued to have its FAR 121 operating with a part 298 authority in good standing.