On average, it takes around 90 minutes to complete the DS-160 form online. The time required depends on how prepared you are with the necessary documents and information. Since the form is detailed, gathering your travel history, employment records, and other personal details may take longer if not prepared in advance. The online system automatically times out after 20 minutes of inactivity, so it is advisable to save your progress frequently. If you cannot complete the form in one sitting, you can save it and return to finish it later, provided you use the application ID issued at the start.