How long do pilots have to go without drinking?

Specifically, the Federal Aviation Administration rulebook states that a pilot may not use alcohol within 8 hours of a flight and cannot have a blood alcohol content above 0.04%.



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Airlines are required by the FAA to randomly test pilots for drugs and alcohol, and tests can also be required after an accident or when someone — such as a fellow crew member or security personnel — has reason to suspect a pilot might be under the influence.

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And because drug tests can't tell the difference between THC and CBD, pilots who are suspected of using THC, accidentally through CBD or otherwise, can be subject to certificate revocation while a positive drug test following an accident could even jeopardize insurance coverage.

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The FAA says a pilot will be removed from a plane if their breath alcohol concentration level is 0.04 or greater. Pilots also must not drink within 8 hours before flying, the so-called “bottle to throttle” time period.

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Single event less than five years ago, or a single event at any time with an unknown BAC or refused a breathalyzer, or with a BAC of . 15% or higher. Two or more events in the pilot's lifetime or history of dependence or substance use disorder.

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Some pilots have a much broader window in which they will not use alcohol within 24 hours of flying. The FAA states, “Even after the body completely destroys a moderate amount of alcohol, a pilot can still be severely impaired for many hours by a hangover.”

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“It can be helpful in relaxing you or easing anxiety in the beginning, and since many people are anxious flyers, this can help,” Shapiro said, while also pointing out that drinking too much can lead to increased anxiety and have a boomerang effect, so it is important to know your limit.

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Pilots and crew members are subject to random drug and alcohol testing throughout their employment. This means that at any given time, they may be selected for testing without prior notice. Random testing helps to deter substance abuse and maintain a high level of safety in aviation operations.

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A medical certificate issued by an Examiner is considered to be affirmed as issued unless, within 60 days after date of issuance (date of examination), it is reversed by the Federal Air Surgeon, a RFS, or the Manager, AMCD.

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These medical conditions include a personality disorder manifested by overt acts, a psychosis, alcoholism, drug dependence, epilepsy, an unexplained disturbance of consciousness, myocardial infarction, angina pectoris, and diabetes requiring medication for its control.

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While the attention these cases receive may make it seem like an escalating problem, statistics suggest otherwise. According to the FAA, between 2010 and 2018, out of nearly 117,000 U.S. pilots tested for alcohol, only 99 were found exceeding the legal limit.

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Do pilots have to take a breathalyzer? For United States carriers operating under Part 121 and 135, the answer is yes. There is a random drug and alcohol test that is performed usually after the pilot lands.

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According to CFR Part 40.85, the standard urine samples are tested for marijuana metabolites, cocaine metabolites, amphetamines, opioids, and phencyclidine (PCP).

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Does the FAA have a list of prescription and over-the-counter drugs that pilots can and cannot take while flying?
  • Tranquilizers, such as but not limited to Valium, Librium, Ativan.
  • Most antidepressants. ...
  • Opiates, such as Morphine, Codeine, Lortab, Percodan, Oxycontin.
  • Muscle relaxants, such as Soma, Sonata, Flexeril.


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