American Airlines flight AA-2250 had to make an emergency landing in Hartford, Connecticut, on February 26th.
The Boeing 737-800 plane took off for Chicago, Illinois, but had to turn back after the crew noticed an unusual smell on board.
The plane landed back uneventfully. All ninety-three passengers and six crew members remained unharmed.
Alaska Airlines flight AS-1506 had to return and make an emergency landing in Seattle, Washington, on February 26th.
The Airbus A320-200 plane took off for Santa Ana, California, but had to turn back after the crew noticed an unusual odor on board.
The plane landed safely. The cabin crew were taken to a hospital for evaluation.
Austrian Airlines flight OS-509 made an emergency landing at Milan Malpensa Airport, Italy, on February 25th.
The Airbus A319-100 plane flying from Vienna, Austria, was descending toward Milan Malpensa Airport when the crew reported an unusual smell in the cabin.
The plane continued for a safe landing. All passengers and crew members remained unharmed.
EasyJet flight U2-426 made an emergency landing in Birmingham, England, on February 25th.
The Airbus A320-200 plane heading from Edinburgh, Scotland, to Bristol, England, was diverted after the crew noticed a burning electrical odor on board.
The plane landed safely. All passengers and crew members remained safe.
Qantas flight QF-58 made an emergency landing in Cairns, Australia, on February 10th.
The plane heading from Port Moresby, Papua New Guinea, to Brisbane, Australia, was diverted after a burning odor was noticed on the flight deck.
The plane landed safely. All passengers and crew members remained unharmed.
TAROM flight RO-275 made an emergency landing at Henri Coanda International Airport, Romania, on January 28th.
The plane took off for Thessaloniki, Greece, but had to turn back after the crew noticed an odor of oil on board.
The plane landed safely. All passengers and crew members remained unharmed.
Air France flight AF-792 made an emergency landing in Lajes, Portugal, on January 24th.
The Boeing 777-300 plane heading from Paris Orly Airport, France, to Pointe-a-Pitre, Guadeloupe, was diverted after the crew noticed a burning odor on board.
The plane landed safely. All passengers and crew members remained safe.
Lufthansa flight LH-2135 made an emergency landing in Munich, Germany, on January 21st.
The Airbus A320-200 plane flying from Muenster, Germany, was on final approach to Munich when the crew reported a strong acid odor in the cockpit.
The plane continued for a safe landing. All passengers and crew members remained safe.
Icelandair flight FI-441 made an emergency landing in Glasgow, Scotland, on January 14th.
The Boeing 757-200 plane heading from Manchester, England, to Keflavik, Iceland, was diverted due to a burning odor in the cabin.
The plane landed safely. All passengers and crew members remained safe.
British Airways flight BA-2578 made an emergency landing at Charles de Gaulle Airport, France, on December 26th.
The Airbus A320-200 plane heading from Gatwick Airport, England, to Turin, Italy, was diverted after a burning odor was noticed in the cockpit.
The plane landed safely. All passengers and crew members remained unharmed.
Lufthansa Cityline flight LH-843 made an emergency landing in Hamburg, Germany, on December 23rd.
The plane heading from Billund, Denmark, to Frankfurt, Germany, was diverted due to a burning odor on-board.
The plane landed safely. All ninety people aboard remained unharmed.
Austrian Airlines flight OS-125 had to return and make an emergency landing in Vienna, Austria, on November 18th.
The Airbus A321-200 plane took off for Frankfurt, Germany, but had to turn back after a strong odor and smoke was noticed on-board.
The plane landed safely. The crew were taken to a hospital for precautionary examination.
Air France flight AF-116 made an emergency landing in Irkutsk, Russia, on November 11th.
The plane heading from Paris, France, to Shanghai, China, was diverted after the crew reported smoke on-board.
The plane landed safely. All two hundred and eighty-two passengers and sixteen crew members remained unharmed.
Jetstar Airways flight JQ-772 had to return and make an emergency landing in Melbourne, Australia, on October 20th.
The Airbus A320-200 plane took off for Adelaide, Australia, but had to turn back after two flight attendants reported feeling unwell due to an odor in the cabin.
The plane landed safely. Both flight attendants were taken to a hospital.
Virgin Australia flight VA-465 made an emergency landing in Adelaide, Australia, on October 18th.
The Boeing 737-800 plane heading from Perth to Brisbane, Australia, was diverted after the crew noticed an electrical odor in the cabin.
The plane landed safely. All passengers and crew members remained unharmed.
Lufthansa flight LH-278 had to return for an emergency landing in Frankfurt, Germany, on October 12th.
The Airbus A319-100 plane took off for Milan Linate Airport, Italy, but had to turn back due to an unusual odor on-board.
The plane landed safely. All one hundred and thirteen passengers and five crew members remained unharmed.
Delta Airlines flight DL-2848 had to divert and make an emergency landing in Indianapolis, Indiana, on October 1st.
The Airbus A319-100 plane heading from Detroit, Michigan, to Saint Louis, Missouri, was diverted after an odor was noticed in the cockpit.
The plane landed safely. All passengers and crew members remained unharmed.
United Airlines flight UA-1640 made an emergency landing in Denver, Colorado, on September 18th.
The Boeing 757-200 plane heading from Los Angeles, California, to Newark, New Jersey, was diverted after an odor was noticed on board.
The plane landed safely. All passengers and crew members remained unharmed.
Hawaiian Airlines flight HA-23 made an emergency landing in Kahului, Hawaii, on August 31st.
The Boeing 767-300 plane was flying from Oakland, California, when the several passengers complained of breathing problems due to an unusual odor on board.
The plane continued for a safe landing.
Twelve passengers and three crew members were checked by medical teams at the airport.
It is believed that the odor was caused by a pepper spray.
American Airlines flight AA-95 had to divert and make an emergency landing at Shannon Airport, Ireland, on August 20th.
The Boeing 767-300 plane heading from Madrid, Spain, to John F. Kennedy International Airport, New York, was diverted after an odor was noticed in the cabin.
The plane landed safely. All one hundred and seventy people aboard remained unharmed.
Frontier Airlines flight F9-1674 made an emergency landing at Raleigh–Durham International Airport, North Carolina, on August 15th.
The Airbus A321-200 plane heading from Orlando, Florida, to Philadelphia, Pennsylvania, was diverted due to an unknown odor in the cabin.
The plane landed safely. Seven passengers and a crew member were treated by the medical teams at the airport. Two passengers and a flight attendant were later taken to hospital.
Alaska Airlines flight AS-1390 made an emergency landing in Los Angeles, California, on August 12th.
The Airbus A320-200 plane heading from San Francisco, California, to New Orleans, Louisiana, was diverted after a strong odor was noticed in the cabin.
The plane landed safely. All one hundred and thirty-six people aboard remained unharmed.
Lufthansa flight LH-681 had to divert and make an emergency landing in Athens, Greece, on August 4th.
The Airbus A321-200 plane heading from Tel Aviv, Israel, to Munich, Germany, was diverted after an electrical odor was noticed on-board.
The plane landed safely. All passengers and crew members remained unharmed.
Spirit Airlines flight NK-779 had to divert and make an emergency landing in Myrtle Beach, South Carolina, on July 26th.
The Airbus A321-200 plane heading from LaGuardia Airport, New York, to Fort Lauderdale–Hollywood International Airport, Florida, was diverted after several passengers and crew members started feeling ill due to a strange odor on board.
The plane landed safely. Ten people were taken to hospital.
British Airways flight BA-864 had to return and make an emergency landing at Heathrow Airport, England, on 
July 23rd.
The Airbus A320-200 plane took off for Warsaw, Poland, but had to turn back due to an unidentified odor onboard.
The plane landed safely. All passengers and crew members remained unharmed.