In certain cases, it is possible to fly with a fever. However, it is preferable, if not strongly advised, to avoid boarding a scheduled flight while being feverish. When you or your child's temperature rises a few degrees above normal, it means your immune system is working to fight off an infection.

Flying with a baby who has a fever is generally discouraged by medical professionals and may be restricted by airline policies. A fever is often a sign of an underlying infection, and the low humidity and pressure changes in an airplane cabin can exacerbate a child's discomfort or lead to dehydration. One of the most significant risks is ear pain; if the fever is caused by an ear infection or a cold, the baby's Eustachian tubes may not function properly, leading to excruciating pain or even a ruptured eardrum during ascent and descent. For infants under three months, any fever is considered a medical emergency requiring immediate evaluation. In 2026, many airlines reserve the right to deny boarding to passengers who appear visibly ill or infectious to protect other travelers. If your baby has a fever, it is essential to consult a pediatrician to determine if they are fit to fly and to ensure they have been on any necessary antibiotics for at least 24 hours before travel.