Post-flight confusion could be construed as a form of delirium. Acute confusional state or delirium is a common clinical syndrome characterised by disturbed consciousness, decline in cognitive function or changes in perception.

Yes, feeling disoriented after a flight is extremely common and is often referred to as "Post-Flight Brain Fog" or a mild form of Disembarkment Syndrome. Several factors contribute to this: the slight oxygen deprivation in pressurized cabins, significant dehydration from the dry airplane air, and the disruption of your inner ear's vestibular system. When you spend hours in a vibrating tube moving at 500 mph, your brain adapts to that motion; once you step onto solid ground, it can take time for your sensory input to recalibrate, leading to a "swaying" sensation or dizziness. Furthermore, crossing time zones causes Jet Lag, which disrupts your circadian rhythm and impacts cognitive function, making you feel "spacey" or confused. To combat this, it is vital to drink plenty of electrolytes, get some natural sunlight immediately upon arrival to reset your internal clock, and engage in light physical activity to stimulate blood flow. If the disorientation persists for more than a few days, it could be a sign of a more serious inner ear issue.