It's one of several mishaps this week involving United Airlines. "United Airlines does not care about the safety of their furry travelers".
And on Monday, a United Airlines flight attendant forced a passenger to load a French bulldog carrier into an overhead bin during the three-and-half hour trip from Houston to New York's LaGuardia Airport.
The dog was on a flight from Newark to St. Louis, when it was supposed to be on a plane to Akron, Ohio, according to the airline.
On Wednesday, the airline mistakenly shipped a dog to Japan instead of Kansas City.
The flight was scheduled to fly direct from Newark to St. Louis.
United said in a statement that the flight attendant did not realize the dog was inside the carrier because she did not hear the passenger's warning.
Kara Swindle paid to ship Irgo as cargo on a flight from OR to Kansas, but instead the German Shepard was put on a flight to Japan.
Kokito died after a United Airlines attendant stored him in an overhead bin in March of 2018 against the wishes of his owner.
Maggie Schmerin, a United Airlines spokeswoman, told CNN the dog had been "loaded onto the flight in error" and was now "safely with its owner".
Prosecutors in Houston are investigating to determine if criminal charges are warranted, AP said. United issued an apology after the discovery of the switched dogs.
Irgo was flown back to the U.S.in first class, Swindle said, but she is considering taking legal action against the airline.