United Airlines flight UA-1704 had to return and make an emergency landing at Newark Liberty International Airport in New Jersey, on March 14th.
The plane took off for Austin, Texas, but had to return shortly afterwards due to strong odor in the cabin.
The plane landed safely. Everyone aboard remained unhurt.
The incident is being investigated.


Cargolux flight CV-775 had to return and make an emergency landing at Calgary International Airport, Calgary, Alberta, Canada, on May 28th.
JetBlue flight B6-39 made an emergency landing in San Jose, Costa Rica, on June 7th.