You May Want to Think Twice About Drinking the Coffee on a Plane

Is Your Airplane Coffee a Risky Choice? New Study Suggests Caution

Next time you're flying, you might want to skip the steaming cup of airplane coffee. Recent findings have cast doubt on the safety of in-flight beverages.

The Breaking Point

A 2026 study by the Center for Food as Medicine and Longevity uncovered surprising risks associated with the water quality used onboard U.S. flights. Routine tests revealed traces of coliform bacteria and E. coli, known for potentially compromising passenger health, in the water supplies of many airlines.

Beneath the Surface

While coliform and E. coli are generally harmless, their presence might indicate unsafe water—a risk that escalates for vulnerable travelers. The study highlights how irregular water testing and adverse storage conditions onboard planes can foster contamination.

The Ripple Effect

Amid growing concerns, airlines like Delta and Frontier score high for clean water, while others, such as American Airlines and JetBlue, fall behind. Travelers are advised to rely solely on bottled beverages during flights to minimize risks and maintain hand hygiene with alcohol-based sanitizers.

As the showdown on water safety continues, passengers are encouraged to be vigilant and prepare with bottled water or alternative drinks when flying.