The northernmost distribution of the Thick-billed Kingbirds is in southern Arizona in the US. The species occurs in western Mexico south to Oaxaca. As with most other kingbirds, this is a bird of open habitats which forages for insects by aerial hawking flights. It nests inaccessibly, high in trees, and detailed study of its breeding biology is lacking; even general statements of its breeding biology have limited factual basis. Indeed, little has been published on almost any aspect of this species' life history.
Much of this species' biology is likely similar to that of other kingbird species: Cassin's Kingbird (Tyrannus vociferans), Tropical Kingbird (T. melancholicus), Couch's Kingbird (T. couchii), Western Kingbird (T. verticalis) and Eastern Kingbird (T. tyrannus).