Bilişik, Candan CanSarikaya, Mehmet Zeki2026-07-012026-07-0120260354-5180https://doi.org/10.2298/FIL2609267Bhttps://hdl.handle.net/20.500.12684/23073In this paper, we establish several new generalizations of Iyengar-type integral inequalities within the setting of Riemann-Liouville fractional calculus. By employing a fractional version of the Montgomery identity, we derive sharp estimates for the deviation between the fractional integral of a function and its discrete weighted averages at n arbitrary nodes. We extend these results to functions whose derivatives belong to the Lr [a, b] spaces by utilizing Hölder’s inequality. The established inequalities provide a unified setting that recovers the classical Iyengar-type results as special cases when the fractional order α = 1. Moreover, the influence of the node distribution on the associated error bounds is examined, and several corollaries corresponding to midpoint and trapezoidal-type rules are derived. © 2026, University of Nis. All rights reserved.en10.2298/FIL2609267Binfo:eu-repo/semantics/closedAccessHölder’s inequalityIyengar-type inequalityL_p spacesMontgomery identityRiemann-Liouville fractional integralArticle409326732742-s2.0-105036634595Q2