Subtract the invisible minutes: taxi to gate, deplaning, restroom breaks, and the inevitable first-photo pause. Add potential immigration lines, transit to the city, return transit, security, and boarding. What remains is your true sightseeing window, a realistic slice of time that respects airline schedules and your stress levels without eliminating spontaneous discovery.
Airlines close boarding earlier than many travelers expect, and security lines fluctuate wildly around shift changes and banked flights. Work backward from the published boarding time, adding a generous margin for document checks and secondary screening. Treat this return deadline as sacred, and your layover excursion becomes delightfully calm instead of dangerously compressed.
Weather, gate changes, temporary immigration surges, and rail delays happen even at impeccably organized airports. Buffer time is not wasted; it is freedom. A thoughtful cushion lets you linger on a viewpoint, enjoy a spontaneous pastry, or reroute calmly if a train platform changes, preserving both your adventure and your onward flight.