Yes, a 14-year-old can fly overseas, but the specific rules depend on the airline's Unaccompanied Minor (UM) policy. Most major international carriers, such as British Airways, Lufthansa, and Emirates, allow 14-year-olds to fly alone as "Young Passengers," meaning they are not required to use the formal UM escort service but can request it for an extra fee. However, some low-cost carriers, like Ryanair, strictly prohibit anyone under 16 from flying without an adult. Beyond the airline, the most critical factor is legal documentation. Many countries require a notarized "Consent to Travel" letter signed by both parents to prevent international parental child abduction. Additionally, if the teen is traveling to a country within the Schengen Area or a nation with specific visa requirements, they must have their own valid passport and any necessary entry permits. It is vital to check the specific requirements of both the departure and arrival countries, as some border officials may question a minor traveling solo.