The mix-up was the third incident involving a pet on a United Airlines flight in just a week.
In the latest incident, a flight from New Jersey to St. Louis had to be diverted to Ohio's Akron-Canton Airport on Thursday because a dog had been loaded aboard it by mistake, reports Fox 8.
The plane had to make a stop in Akron, Ohio to drop off the pet and reunite it with its owners.
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And so the plane followed the dog's itinerary. Now, United is under criticism again after the Swindle family realized they'd been swindled when their dog who should've flew to Wichita, Kansas instead crossed two oceans and landed in Japan.
Passengers were provided compensation for the delay. He tells 5 On Your Side about an hour into the flight the captain told passengers they flight had "miss-boarded cargo" and diverted the flight to Akron. The dog, Kokito, suffocated.
Then on Tuesday, another case of mistaken canine identity occurred on a United flight, sending a pet owner into a frenzy when she discovered a Great Dane in the place of her German Shepard, Irgo, in a facility at the Kansas City airport.
United was also under fire past year for the treatment of a passenger who was physically dragged off a plane the airline had overbooked, when videos posted online by other passengers showed a man screaming as officers yanked him from his seat.