Starting and rooting is the same for either photperiods or autoflowers. That takes about 2 weeks to ensure your seedlings have a decent root mass.
Veg time depends on the situation but usually falls into 2-6 weeks. This is one of the benefits to growing photos as you can control this stage almost indefinitely. It depends on how many plants and how big you want them.
I like rooting for 2 weeks, vegging for 4 weeks.
-Flipping the lights at 6 weeks is a fairly common timeframe
Flowering is strain dependent but can be as quick as 40-50 days or take double that. I prefer strains that are done by 8 weeks or 55-60 days.
So 2wk Root + 4wk Veg + 8wk flower = 14wks
= 98 days from start to finish or just under 3.5months
"Ideal"
4wk root, 4wk veg, 8 wk flower = 16weeks
Or 4 months
"Average"
This is all a soil growers timeframe. Other methods could be faster.
One example is my "current grow" that you can click on in my signature it gives you a detailed journey of some photoperiod seeds.
D.A.A.S.69 But this grow is taking a while it might be 4.5- 5 months.