United Airlines flight UA-1098 had to return and make an emergency landing in Houston, Texas, on May 20th.
The Boeing 737-800 plane took off for San Jose, Costa Rica, but had to turn back after the crew noticed a hydraulic problem.
The plane landed safely. All passengers and crew members remained unharmed.
Shaheen Air flight NL-902D made an emergency landing in Lahore, Pakistan, on January 8th.
Wizz Air flight W6-1011 made an emergency landing in Liverpool, England, on September 7th.