– Take note that as a transit passenger, you are only allowed to enter and exit Singapore once during your layover period. That being said, you are not able to join more than 1 tour. – Don't forget to leave your luggage at the airport.

Yes, you can absolutely leave Changi Airport to explore Singapore during a layover, provided you have at least 5.5 to 6 hours between flights. To do so, you must be eligible for entry into Singapore based on your nationality (some may need a visa), complete the online SG Arrival Card, and have a passport with at least 6 months' validity. In 2026, Changi Airport continues to offer its world-famous "Free Singapore Tour" for transit passengers with layovers between 5.5 and 24 hours, which is a great way to see the city skyline and Gardens by the Bay without the stress of navigating on your own. If you prefer to go solo, the MRT train takes about 45 minutes to reach the city center, while a taxi takes about 25–30 minutes. Just remember that you can only enter and exit Singapore once during your layover. If your layover is shorter than 5 hours, it's safer to stay "airside" and enjoy the airport's own attractions, like the Jewel rain vortex or the butterfly garden, which are destinations in their own right.