How do I peer with someone on the same exchange, but different region?

We are looking to jump onto the Equinix exchange in San Jose. (SV10 specifically).

According to PeeringDB the main carrier we want to peer with is on the Equinix exchange, but only in Equinix Dallas and Equinix Chicago.

My question is, if we jump on the Equinix IX in San Jose, can we get to this specific carrier over in Dallas or Chicago? Or do we need to order another transit circuit from San Jose to Dallas and then jump on the Equinix IX in Dallas also?