While the year is currently 2026, looking back at the rules from 2023 and the current 2026 standards, the answer is yes, you can leave Singapore Changi Airport during a layover, provided you meet specific criteria. To leave the transit area, your layover should be at least 5.5 to 6 hours long to account for immigration and travel time. You must have a valid visa for Singapore (though many nationalities are visa-exempt) and you must complete the SG Arrival Card online before clearing immigration. In 2026, Changi continues to offer the "Free Singapore Tour" for transit passengers with layovers between 5.5 and 24 hours, which is the easiest way to see the city without the stress of planning your own transport. If you choose to explore on your own, the MRT (train) can take you to the city center in about 30 minutes. It is vital to remember that you must clear "Arrival" immigration to leave and "Departure" immigration/security to return, so you should aim to be back at the airport at least 2 hours before your next flight to ensure a smooth connection.