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Adoption of Software-Defined Networks(SDN) as a new networking paradigm, promises solutions for Quality of Service(QoS) management issues raised at the service providers level due to the massive increase in connected devices (e.g., Servers, Mobile devices, M2M, Things, etc.), traffic in between, and the diverse user and service demands (e.g., delay, bandwidth, etc.). Although its advantage in network control flexibility compared to traditional networking, SDN still requires a design of robust and fast QoS guaranteeing routing algorithms due to its central control computation overhead. In this article, we present a new QoS-aware routing algorithm designed to work on top of SDN and serves delay-sensitive services that require certain delay requirements with low computation time. Such problems are usually modeled as Delay Constrained Least Cost (DCLC) problem which is a well-known NP-hard problem. We …