I have been told the road between kantary and airport will be closed on Sunday morning from 6:00am and 9am,can someone confirm this information
Do you know the exact times of the road closure
Even if there are publicised exact times, don't rely on them.
The event starts at 6am and if it follows the traditional l'Etape in France, riders will be started in smaller groups every 20 minute or so. I have no idea how many riders signed up, so couldn't estimate how long the start will take. The event rides along Hwy 4 for about 20 kilometers so that adds an hour of closure to whatever time the start finishes.
If your hotel is quoting 6 to 9, then I would count on the road being closed for at least that period, maybe longer.