ATA Airlines flight I3-5653 had to return and make an emergency landing in Tabriz, Iran, on April 9th.
The plane took off for Tehran, Iran, but had to turn back due to cabin pressure problems.
The plane landed back safely. All passengers and crew members remained unharmed.

Aer Lingus flight EI-109 had to return and make an emergency landing in Dublin, Ireland, on August 31st.
An Emirates flight made an emergency landing in Ahmedabad, India, on December 22nd.
Norwegian Air Shuttle flight DY-7088 had to divert for an emergency landing in Keflavik, Iceland, on July 16th.