To go with its rugged look, all but the base Telluride come with built-in roof rails, while the cross rails will cost you extra and are not automatically a part of the car.
To add some more info, I looked at the official specs for the Telluride and it looks like the roof rails come standard on both the S and EX trim levels, but not on the LX. On the S and EX the roof rails come in a silver finish.
Roof rails also come standard on the top-level SX trim, but come in a chrome anodized finish, to match the detailing on the rest of the car.
The cross-rails can be added on when you order the car for an additional $310.
It likely won't matter, but i also wanted to point out that the roof rails do raise the overall height of the vehicle. Without roof rails the Tellride is 68.9-inches tall, ad when you add them it grows slightly by 0.4-inches to 69.3-inches
I recommend getting the cross rails from Kia direct. Most of the aftermarket sites I've found charge more for them.
On KiaStuff.com they are going for over $400
OEMKiaSuperstore also charges around $400
KiaStuff does, however sell additions like a bike rack or ski/snowboard rack.
Here's a helpful video from Kia about their roof racks