Yes, children are absolutely allowed in first class on almost all commercial airlines in 2026. While there is often a lively debate among travelers regarding "peace and quiet," airlines do not discriminate based on age as long as a ticket is purchased. In fact, many 2026 luxury carriers like Emirates or Singapore Airlines provide specialized first-class amenities for children, including high-end toys, kid-friendly gourmet menus, and dedicated entertainment channels. A supportive peer tip: for infants under two, many airlines offer a "lap child" rate for first class, though it is often 10% of the full adult fare, which can still be quite expensive. If you are flying with a child in 2026, the general etiquette is simply to ensure they are well-prepared for the pressure changes during takeoff and landing to keep both the little traveler and your fellow passengers comfortable.