How long does it take to drive from Jasper Park to Calgary via Banff ?

Google even calculates the time to enjoy the scenery?

But why does Google Maps show only 200 kilometers, but it takes 7 hours to travel from Jasper town to Banff National Park?

It depends on how fast you drive. They are all expressways: distance/vehicle speed = time. It takes about 4.5 hours to get to Banff Town; it takes more than 1 hour to get from Banff to Calgary Airport or downtown. Because it is close to Calgary, there will be traffic jams. If you are in a hurry for the plane, you should budget more time.

Most of the maps are outdated, the roads are still relatively smooth, so it shouldn't take too long. There have been landslides and other incidents in the area recently.

There are many scenic spots on the road that need to be stopped to see, and the mountain road will naturally slow down the speed.