We conducted a cross-sectional study to evaluate timeliness of patient arrival at a pediatric multispecialty clinic. Bivariate and ordered logistic regression analyses were conducted to determine the odds of late arrival by specified patient- and visit-level characteristics. A total of 64 856 visits were available for analysis, of which 6513 (10.0%) were late arrivals. The odds of late arrival were higher for patients who spoke English (odds ratio [OR] = 1.34, P < .001) compared with those who spoke Spanish, had Medicaid (OR = 1.54, P < .001) or no insurance (OR = 1.49, P < .001) compared with those with insurance other than Medicaid, and were late to their previous visit (OR = 2.46, P < .001). Visit-level variables associated with late arrival included appointment time earlier in the day (i.e. 8-10 AM, OR = 2.77, P < .001 compared with 4-6 PM), earlier in the week (i.e. on Mondays, OR = 1.21, P < .001 compared with Wednesdays), and for certain subspecialty clinics (P < .001). Numerous variables are significantly associated with late arrival for pediatric clinic appointments.