Six hours, and that's Texas law talking, not the school. Every TDLR-approved driving safety course in Texas teaches the same state-mandated 300 minutes of instruction, so a school advertising a faster course is advertising something that can't legally exist. Pick on price and experience; the clock is fixed.
What varies is how the six hours feel. Texas caps how much of the course can be audio and video, so even the slickest course mixes clips with reading, quizzes, and validation questions that confirm you're actually there. Online courses save progress, so the realistic pattern is two or three sittings across an evening or a weekend rather than one six-hour block.
The deadline wrapping the six hours belongs to your court: after granting permission to take the course, the court sets a completion date, typically 90 days. Six hours against 90 days is generous; the drivers who miss it are the ones who file the paperwork and forget.
Every approved online course we track is compared on the Texas page, and what the course actually buys is on our points page.