Danish Air Transport flight DX-31 had to return for an emergency landing in Bornholm, Denmark, on December 3rd.
The plane took off for Copenhagen, Denmark, but had to turn back after the crew noticed smoke in the cabin and cockpit.
The plane landed safely. All 14 passengers and 4 crew members remained unharmed.

British Airways flight BA-2607 had to return and make an emergency landing at Naples International Airport, Naples, Italy, on March 31.
American Airlines flight AA-2023 had to divert and make an emergency landing at Des Moines International Airport, Polk County, Iowa, on March 18.