Inflight smoking is prohibited by almost all airlines. The bans on inflight smoking have been imposed in a piece-meal manner around the world beginning in the 1980s.
In October 2015, the United States Department of Transportation prohibited the use of electronic cigarettes on flights, as well as transporting such devices in checked luggage, because of fire risk from their batteries. In July 2019, an Air China aircraft made an emergency descent after cabin oxygen levels dropped, which has been linked to a co-pilot smoking an e-cigarette during the flight.
In 1969, consumer advocate Ralph Nader was among the first in the United States to call for a smoking ban on airlines. Pressure for an inflight smoking ban also came from flight attendants' unions, such as the Association of Flight Attendants.
In the United States, both tobacco companies and airlines fought any regulation. In 1976, the US Civil Aeronautics Board banned cigar and pipe smoking on aircraft, but under pressure from tobacco interests, it sought to limit this ban in 1978. Also, CAB banned and then unbanned smoking in 1984, with chairman Dan McKinnon saying, "Philosophically, I think nonsmokers have rights, but it comes into market conflict with practicalities and the realities of life." After years of debate over health concerns, Congressional action in 1987 led to a ban on inflight smoking. In 1988, United States based airliners banned smoking on domestic flights of less than two hours duration, which was extended to domestic flights of less than six hours in February 1990, and to all domestic and international flights in 2000. The 1990 ban applied to the passengers and the cabin of the aircraft, but not the flight deck; pilots were allowed to continue smoking after the 1990 ban due to concerns over potential flight safety issues caused by nicotine withdrawal in chronic smokers. In 1994, Delta was the first US airline to ban smoking on all worldwide flights.
In 1990, Air Canada adopted a nonsmoking policy on all its routes. In 1994, Canada was the first country to ban smoking on all flights operated by Canadian carriers, which also covered charter flights, but not foreign airlines flying to Canada. It had previously banned smoking on commercial domestic flights in Canada and international flights of less than six hours, which obviously did not cover the Japan route. Canadian Airlines had opposed the blanket ban, saying it would put the airline at a competitive disadvantage especially on the lucrative Japan route. It said it would lose millions of dollars in business from smoking passengers. It estimated it would lose $22 million in annual revenues on its 14 flights a week to Japan. It said that three quarters of its passengers on the Japan route were Japanese and that 60% of them smoked.
In April 1988, Japan Airlines (JAL) was the first Japanese airline to introduce a smoking ban on domestic flights of up to one hour's duration, which was extended in October 1990 to two-hour flights. In 1998, All Nippon Airways and JAL banned smoking on all domestic flights, which covered more than 50% of Japanese domestic travelers. These airlines extended the ban to international flights in March 1999, among the last airlines to ban smoking on international flights. Japan Tobacco lobbied the airlines to reconsider the ban, noting that smoking was earlier banned on all flights of 22 foreign airlines using Japanese airports and that with the smoking ban by the two major Japanese airlines more than 80% of seats on international flights departing from Japan would be nonsmoking.
In 1988, SAS made domestic flights in Sweden and Norway non-smoking and in 1989, the policy was expanded to domestic flights in Denmark and flights between the Nordic countries. In 1996, SAS flights to the Benelux countries, France, Germany, Switzerland, Austria and the UK became non-smoke. In 1997 SAS banned smoking on all flights. Also in 1997, the EU banned smoking on flights in member states. Air France, the French state-run carrier, did not allow inflight smoking from November 2000, The United Kingdom banned smoking in enclosed public places in July 2007.
Australia banned smoking on domestic flights in December 1987, on international flights within Australian airspace in 1990, and in 1996 banned smoking on all Australian international flights.
Cuba’s state-owned Cubana banned smoking on international flights in 2014. China banned inflight smoking in October 2017. Individual airlines were given two more years before a cockpit ban was to take effect; however, this concession was scrapped in January 2019 following incidents that triggered safety concerns.
Following a fire in an airline bathroom waste bin that caused a crash and killed 124 people, in 1973 the US Federal Aviation Administration banned smoking in aircraft lavatories. Following a fire that originated in a lavatory (not necessarily from smoking) on Air Canada Flight 797 in June 1983, resulting in the death of 23 passengers, new requirements to install smoke detectors in lavatories were brought in.
Normally, passengers found to be smoking on non-smoking flights will at least face a fine and at worst be arrested and detained upon landing. Due to stringent security measures, this often causes disruption; a flight may have to be diverted or a scheduled landing might have to be expedited upon arrival at the destination airport in order to escort the smoker from the plane.
Such regulations have on occasion met with defiance; in 2010 a Qatari diplomat was arrested upon arrival at Denver International Airport for smoking in the onboard lavatory on United Airlines Flight 663 and for making threats; when confronted by airline staff, he jokingly suggested that he was attempting to set his shoes on fire. On February 3, 2013, a family of four were accused of smoking during a Sunwing Airlines flight from Halifax to the Dominican Republic. The flight made an unscheduled landing at Bermuda L.F. Wade International Airport, where the two eldest of the family were arrested by Bermuda Police Service and subsequently sentenced to a $500 fine or 10 days in prison.