An aerospace engineer has shed light on why ashtrays are still present on commercial aircraft, even though smoking has been banned on flights for decades. The explanation centers on safety regulations and the assumption that some passengers will still break the rules.
Background of the Smoking Ban
Smoking was banned on domestic flights in the UK lasting up to six hours in 1990. By 1997, the UK and the European Union had enforced a comprehensive ban across all flights within EU airspace. Today, lighting a cigarette or vaping on a plane can result in hefty fines, arrest at the destination, or even aircraft diversion, leading to serious penalties.
Despite these strict prohibitions, ashtrays remain a standard feature in aircraft lavatories and other areas. This has puzzled many frequent flyers, who question why newly manufactured planes still include them.
The FAA Requirement
According to aviation regulations, including those from the Federal Aviation Administration (FAA), ashtrays are a mandatory safety feature. A Reddit user explained: "It's an FAA requirement so that when someone does light up, there's a safe way to dispose of the ashes. You'll still get in trouble, anyway."
An aerospace engineer confirmed this, stating: "Aerospace engineer here. The trash bins are also fireproof, because while you're correct about the reason why we provision an ash tray, we have so little trust in passengers that we expect them to do what you suggested anyway."
Fire Risk Mitigation
The primary purpose of ashtrays is to prevent fires. If a passenger smokes in defiance of the ban, the ashtray provides a fireproof place to stub out a cigarette, rather than discarding it in a waste bin filled with paper, which could ignite. Even though trash bins are also fireproof, the ashtray offers an additional layer of safety.
One commenter expressed frustration: "This rule is actually one of my big pet peeves, as there are other mitigations in place, e.g., extinguishers in the trash, and the ashtrays on the newest products are so small you couldn't fit a cigarette in them anyway. People mistake them for coat hangers, break them, and ground the aircraft. Grinds my gears."
Consequences of Missing Ashtrays
Interestingly, a missing or broken ashtray can ground an aircraft. Another commenter noted: "Also, fun fact, it's a no-go item if it's broken/missing, had an aircraft grounded before because they couldn't find a spare." A fellow traveler added: "I remember reading an article a few years ago that the toilet door was broken (and subsequently the ashtray was unavailable) and the flight was cancelled."
This underscores the regulatory importance of ashtrays, as they are considered essential safety equipment. Despite the global smoking ban, aviation authorities assume some passengers will still violate the rules, making ashtrays a necessary precaution.



