Frontier Airlines flight F9-1764 made an emergency landing in Phoenix, Arizona, on May 27th.
The Airbus A320-200 plane heading from San Diego, California, to Tulsa, Oklahoma, was diverted after a number of passengers reported feeling unwell due to an unidentified odor on-board.
The plane landed safely. Seventeen passengers were examined by the medical teams at the airport while one passenger was taken to a hospital.

Transavia flight HV-163 made an emergency landing in Vienna, Austria, on May 13th.
Air India flight AI-120 had to divert and make an emergency landing in Tehran, Iran, on August 9th.
Southwest Airlines flight WN-214 had to divert and make an emergency landing in Jackson, Mississippi, on December 6th.