Yes, you can travel alone to the UK at age 17 in 2026, but you must meet specific Home Office and airline requirements. While the UK government considers anyone under 18 a "minor," 17-year-olds are permitted to enter the country without an adult. However, you must carry a notarized letter of consent from your parent or legal guardian that includes their contact details and proof of where you will be staying in the UK. Border Force officers may ask for this to ensure your safety and prevent child trafficking. On the airline side, most carriers like British Airways or Virgin Atlantic treat 17-year-olds as "young adults," meaning you don't need their "Unaccompanied Minor" service and can book a standard adult ticket. However, some low-cost carriers have different rules, so always check the "Minor Policy" of your specific airline. Additionally, you should be aware that while you can fly alone, you may face restrictions when booking hotels or hostels in the UK, as many require guests to be 18+ to check in. It is essential to have a confirmed accommodation that explicitly accepts 17-year-olds and to carry a printed copy of that confirmation.