United Airlines already has similar regulations in place, NPR reported.
The proposed regulations allow passengers with psychiatric disorders who have a service animal to be able to bring their dog on a flight, but it has to be trained similarly to the animals that help owners who have physical issues, NPR reported.
Passengers who say they depend on their animals for emotional support to deal with mental health issues say they should not have restrictions placed on them, but disability rights groups and mental health professionals say that emotional support animals that are untrained could pose a danger.
Airline officials had more than 3,000 complaints in 2018 about animals biting passengers, defecating or urinating during a flight or fighting with other pets, The Wall Street Journal reported.
The public can comment for 60 days on the proposed regulations.