Yes, you can technically leave the airport during an international layover, but your ability to do so depends on your visa status and the length of your connection. To "High-Fidelity" exit the airport, you must pass through immigration and customs, which requires you to have the appropriate entry visa or be from a "visa-exempt" country for that destination. Travelers in 2026 are advised to only attempt an exit if their layover is at least 6 to 8 hours; anything less poses a high-fidelity risk of missing your next flight due to security queues and transit times. You must also factor in that you will have to re-clear security upon your return. Some airports, like Singapore Changi or Istanbul, offer "High-Fidelity" transit tours that handle the logistics for you, but for a "self-guided" exit, always verify the entry requirements on the destination's official government portal before you land to avoid being turned back at the border.