The aviation transport volume in the Asia-Pacific region continues to grow, with many airports aspiring to become aviation hubs. However, in 2020, the aviation industry faced significant disruptions due to the COVID-19 pandemic. In light of this, this study aims to explore the pre-pandemic and post-pandemic airport competitive advantages of major Asian airports. This study selected six major airports, focusing on the quality of transit services and the number of transit flights. Specifically, the study examines two perspectives: quantity (QVC) and quality (QCI), utilizing connectivity indices such as Hub Connectivity Performance Index (HCPI) and Hub Efficiency Index (HEI). Based on connectivity analysis results, Singapore Airport, Suvarnabhumi Airport, and Kuala Lumpur Airport hold a leading position in HEI due to their geographical advantages. These airports should continue to develop Southeast Asia - Europe routes. Hong Kong International Airport follows closely in connectivity, but its flight numbers were significantly affected by the pandemic and the anti-extradition bill protests factors. Efforts to expedite the recovery of the European market are recommended. Incheon Airport benefits from the rapid development of low-cost aviation in recent years, expanding routes and flight frequencies, resulting in a continuous increase in QVC. However, it needs to enhance transit efficiency to elevate its HEI. Taoyuan Airport lags behind the aforementioned airports in both QVC and HEI. To attract more transit passengers, it should increase flights in this market.