Latinos have a higher rate of mortality and lower rate of colorectal cancer (CRC) screening than most racial groups in the United States. This study examines the predictors of screening colonoscopy (SC) for CRC among Latinos in a patient navigation (PN) intervention. Participants were randomized to either a culturally-targeted PN group (n = 225) or a standard PN group (n = 167). Each completed an interview assessing sociodemographic and intrapersonal information. There was no difference in SC completion between PN groups (80.9 and 79.0 %). Logistic regression revealed that low language acculturation (OR = 2.22) and annual income above $10,000 (OR = 1.97) were independent predictors of completion. Both standard and culturally-targeted PN successfully increased SC completion by nearly 30 % above the recent estimation for physician-referred patients. Our findings suggest a need to further reduce barriers to SC in low income and highly acculturated Latino groups.