Chhatrapati Shivaji Maharaj International Airport (CSMIA), ranked 28th in the world and 14th in Asia in the fiscal year 2022 in terms of passenger traffic is one of the busiest airports located in the financial capital of India. It is the second busiest airport in India after Delhi. With the privatisation of Mumbai’s CSMIA, the Indian airport industry saw a dramatic transformation in 2006. With the expansion of the new terminal, the economic value that the airport will hold in terms of trickling down economic benefits to the city and the financial growth opportunities will be immense. The International Civil Aviation Organisation (ICAO) has created a thorough set of Standards and Recommended Practices (SARPs) for airports in its Annex 14 to the Chicago Convention in order to guarantee the security, regularity, and effectiveness of international air navigation. The chapter attempts to provide an overview of ‘International Standards’ and ‘Best Practices’ at the CSMIA, specifically in the areas of ‘Security Regulations’, ‘Passenger Service’ and ‘Sustainability’. The chapter evaluates Mumbai Airport’s adherence to ICAO and IATA security protocols, including passenger screening, access controls, and threat detection. The second part of the chapter will focus on airport management along with global benchmarks for efficient processing, amenities, and overall traveller experience. The third part of the chapter delves into the initiatives to minimize environmental impact, optimize resource usage, and promote green operations. To achieve global net zero targets, the Mumbai airport will play a key role in accelerating renewable energy adoption, optimising resource consumption, and driving circular economy initiatives. The chapter is the outcome of an in-depth review of processes, and performance data against global benchmarks, feedback from airport management, airlines, regulatory authorities, and a first-hand assessment of operations, infrastructure, and passenger experience. The chapter also explores the issues associated with customs, human rights violations and the curious case of illegal wildlife trafficking that happens at the Mumbai Airport. The chapter provides a detailed understanding of Mumbai Airport’s performance and compliance with global best practices. The chapter will also guide the airport’s efforts to enhance security, passenger services, and sustainability and suggest mechanisms to promote coordination with regulatory authorities for the successful implementation of the improvement initiatives.