Spirit Airlines flight NK-551 had to divert and make an emergency landing in Kansas City, Missouri, on April 30th.
The Airbus A320-200 plane heading from Akron–Canton Airport, Ohio, to Las Vegas, Nevada, was diverted after an unknown odor was detected in the cockpit.
The plane landed safely. All 171 people aboard remained unharmed.

American Airlines flight AA-67 had to divert and make an emergency landing at Heathrow Airport, England, on July 25th.
A Southwest Airlines flight made an emergency landing at Birmingham-Shuttlesworth International Airport, Alabama, on November 22nd.
Tarco Airlines flight 3T-400 was hit by a bird in Al-Fashir, Sudan, on September 10th.