Common airplane habits can have dangerous health impact: 3 mistakes to avoid that people often make

Air travel is now routine for millions, but experts say some everyday habits inside aircraft cabins may quietly increase exposure to bacteria. While flying itself is safe and highly regulated, certain hygiene practices, especially inside the restroom and around onboard water use, may not work the way passengers assume.

Experts and researchers have flagged three common mistakes that people make mid-flight that can increase contamination risk.

Mistake 1: Relying on airplane bathroom

One of the most common habits passengers follow is washing hands inside the aircraft toilet after use. On the surface, it seems like basic hygiene, but experts warn that this step alone may not protect passengers fully.


Flight attendant and travel blogger Josephine Remo pointed out a key issue in restroom sanitation practices. As per New York Post, she explained, “The toilets are regularly cleaned, but the locks and door handles are not.”

This means passengers often clean their hands but immediately re-contaminate them by touching shared door handles and latches while exiting. The cycle reduces the effectiveness of handwashing inside the aircraft restroom itself.

Because of this, experts suggest that passengers should not depend only on washing hands in the toilet, but also use sanitizers before and after contact with shared surfaces.

Mistake 2: Using airplane water for drinking, tea, etc

A second major concern comes from the aircraft’s onboard water supply. Research published in the Annals of Microbiology (2017) examined ice samples used in flights and found more than 50 strains of bacteria, many linked to potential human infections. The study highlighted possible contamination in onboard water systems.

Charles Platkin, executive director of the Hunter College NYC Food Policy Center and author of the study, shared his personal conclusion from the research with Travel and Leisure. He said, “My takeaway from doing the research was to not drink the coffee and the tea. At all.”

He also added that he avoids using tap water onboard for hygiene purposes and prefers wipes instead. His concern is tied to the fact that aircraft water tanks are not always cleaned as frequently as passengers might assume, which increases exposure risk.

Mistake 3: Ignoring high-touch surfaces and poor ventilation

The third mistake is underestimating how contaminated airplane bathrooms can become due to constant shared usage and limited airflow. Unlike regular public restrooms, aircraft toilets are small enclosed spaces with heavy passenger turnover during long flights.

Shanina Knighton, research associate professor at Case Western Reserve University, stressed the importance of being aware of what passengers touch inside the restroom. She specifically pointed out shared surfaces like door latches, which every passenger uses regardless of hygiene habits.

A former flight attendant also highlighted that airplane bathrooms have limited ventilation, meaning air inside the space is not refreshed in the same way as standard facilities. This increases the chance of exposure to lingering particles in a confined environment.

What experts suggest instead

Instead of relying only on in-bathroom washing, experts recommend carrying alcohol-based sanitizers and disinfectant wipes. These can be used after touching tray tables, seat pockets, luggage handles, and restroom surfaces.

As per Unilad, flight attendant Josephine Remo also advises using sanitizer frequently during the flight and washing hands thoroughly only once on the ground where facilities are more reliable.

The overall takeaway from experts is not to panic, but to adjust habits slightly. Small changes in how passengers handle hygiene mid-flight can help reduce unnecessary exposure to bacteria during travel.