Presently, as per the regulations, children under the age of two are allowed to sit in their parent's lap, however, the safest place for a baby is a separate seat all buckled up. But if you can't afford another ticket, just go for a window seat or an aisle spot. This is all that we know and see today.
As opposed to the present day facilities, 1950s photos reveal how babies traveled in the past. As we already know about some of the interesting facts about airplanes, the baby-traveling-fact adds another.