Houston Business Journal | Southwest Airlines begins international shipping between Houston, Mexico Houston Business Journal The company is starting the program with shipping cargo between the U.S. and Mexico City, but it will add Cancun, Puerto Vallarta and Cabo San Lucas/Los Cabos, Mexico, later this summer. Other international destinations within Southwest's network will ... Southwest Airlines Cargo Begins Shipping Internationally Oakmark Global Fund: Second Quarter 2018 Southwest goes international with cargo business |