UPDATE 1-Southwest Airlines reaches tentative agreement with Transport Workers Union

Southwest Airlines said on Thursday it has reached a tentative agreement with Transport Workers Union that represents nearly 18,000 ramp, operations, provisioning and cargo agents. The agreement was with the union's local chapter TWU 555, which will communicate details of the deal directly to members, Southwest Airlines said. The carrier did not provide any details about the agreement, which will have to be ratified by the workers.