While legally there's no minimum age for babies to travel, airlines have different booking policies and charges. In general, most airlines ask that babies are at least two weeks old when travelling, although some may allow seven-day-old infants to fly.

Yes, a 2-month-old baby can absolutely travel on a plane in the UK. Most airlines allow infants as young as 14 days old to fly, and some (like British Airways) permit babies as young as 48 hours with medical clearance. By two months, a baby’s immune system is slightly more robust, which is often when pediatricians feel more comfortable with air travel. In the UK, infants under two years old usually travel for a small flat fee (or 10% of the adult fare) and must sit on an adult's lap secured by a special loop seatbelt. You are allowed to bring essential baby items like expressed breast milk, formula, and sterilized water in containers over 100ml in your hand luggage, provided you present them for separate screening at security. Most airlines also allow you to check in two pieces of baby equipment, such as a collapsible stroller and a car seat, free of charge.