IndiGo flight 6E-452 had to return and make an emergency landing in Bangalore, India, on October 8th.
The Airbus A320-200N plane took off for Ahmedabad, India, but had to turn back after the crew needed to shut down one of the engines due to loss of oil pressure.
The plane landed safely. All passengers and crew members remained unharmed.

Bulgaria Air flight FB-8798 had to return and make an emergency landing in Rijeka, Croatia, on June 1st.
Pakistan International Airlines flight PK-194 had to divert and make an emergency landing in Muscat, Oman, on June 24th.
Allegiant flight G4-676 had to divert and make an emergency landing at McGhee Tyson Airport, Tennessee, on April 30th.