You are technically allowed to fly with a cold, as most airlines do not have strict rules against non-communicable or minor illnesses. However, flying with a head cold can be extremely painful and potentially damaging to your ears. When you have a cold, your Eustachian tubes—which balance the pressure between your inner ear and the cabin—become blocked by inflammation. During the rapid pressure changes of takeoff and especially landing, this can lead to "Ear Barotrauma," causing intense pain, temporary hearing loss, or in rare cases, a ruptured eardrum. In 2026, while masking is no longer mandatory, it is highly encouraged as a courtesy to fellow passengers. To manage the pressure, doctors recommend using a decongestant spray 30 minutes before descent and using "EarPlanes"—specialized pressure-filtering earplugs. If you have a high fever or severe respiratory symptoms, it is always better to rebook, as the recycled cabin air and pressure can worsen your condition and expose others.