JetBlue is one of the few major airlines that allows passengers to travel with their pets on board. Passengers who wish to bring their pets along when they book a flight with JetBlue must adhere to the JetBlue Pet Policy. For example, your pet must be well behaved, clean and odor-free, fit under 80 pounds in both weight and size for transport in the cabin area, and be at least six months old in order to be flown.