Ryanair flight FR-1438 had to return and make an emergency landing in Milan–Malpensa Airport, Italy, on December 16th.
The Boeing 737-800 plane took off for Palermo, Italy, but had to turn back after the crew received indication of a fuel leak.
The plane landed safely. Everyone aboard remained unharmed.

Norwegian Air International flight D8-1842 had to return and make an emergency landing in Dublin, Ireland, on July 19th.
Volotea flight V7-1733 had to reject takeoff from Genoa, Italy, on November 5th.
JetBlue Airways flight B6-213 had to divert for an emergency landing at O’Hare International Airport, Chicago, Illinois, on January 5th.