Yes, Grab is generally available 24 hours a day, particularly in major Southeast Asian metropolitan hubs like Singapore, Bangkok, Jakarta, and Ho Chi Minh City. Because Grab utilizes a network of independent private-hire drivers, there are almost always drivers working the "night shift" to cater to airport transfers, hospitality workers, and nightlife crowds. However, availability can vary significantly depending on your exact location and the time. In 2026, if you are in a more suburban or rural area at 3:00 AM, you may face longer wait times or find that no drivers are currently online. Additionally, Grab often applies "Surge Pricing" during late-night hours when demand outstrips the number of active drivers. For critical early-morning trips, such as a 4:00 AM flight, many travelers prefer to use Grab’s "Advance Booking" or "Scheduled Ride" feature (where available) to ensure a driver is assigned to them ahead of time.