Flying with pets can be complicated (especially internationally), but what are 
United Airlines, 
American Airlines, and 
Delta Air Lines pet policies? There is certainly plenty that passengers should know before flying with pets in the United States – flying with pets is an area where regulations have changed over the years. Not only is this article about flying with these three carriers and only domestically, but flying internationally with pets can be very complicated – especially to destinations like Australia and New Zealand. Service dogs and military pets normally have different regulations (and are only touched on in this article).