許多大都會早年因市區機場周邊土地使用受限、噪音管制及運量不勝負荷，而於市郊或衛星城市另新建國際機場，舊機場則轉型運用，這類機場發展即形成一都會區雙機場模式。最近幾年，此類亞洲都會區雙機場模式漸轉型，運用市區機場接近市中心的優勢，重新定位舊市區機場為區域國際機場，陸續發展區域之市區機場與市區機場對飛航線。本研究旨針對於亞洲首都（重要都市）市區機場對飛航線之成型下，探討都會區雙機場中之市區機場市場涵蓋範圍與規模。本研究以解析性概念模式及連續性網路分析方法為基礎，進一步將個體時間價值分配之實證數值整合於解析性之市場範圍區隔模式中，透過同一「城市對」航線市場中不同「機場對」之一般化旅行成本比較關係與解析模式推導，及運用連續性網路方法，推估雙機場之市場範圍區隔與市區機場之市場涵蓋範圍與規模。透過本研究模式分析結果，推估松山機場於亞洲區域市區機場對飛航線啟航後，在這些城市對航線市場中能與桃園國際機場分配到多少市場、及其地理上之市場涵蓋範圍。再透過情境分析與敏感度測試，探討重要參變數之影響，並推論雙機場市場區隔策略意涵以及機場發展參考。研究結果顯示，時間價值越高、出發可及時間縮短、到達接駁時間縮短，會較偏向選擇松山機場之市區機場對飛航線。而透過本研究分析可瞭解松山機場的市場涵蓋範圍以臺北市為主要核心，推論其定位以首都商務機場並應提升可及性為首要之務，且一區雙機場發展確有必要性。 The roles of a metropolis s two airports have changed. Many years ago, due to urban development, airport noise regulation, and traffic congestion, major metropolises built new international airports and transformed existing city airports into domestic airports. But more recently, this pattern of "one domestic airport, one international airport" for major metropolises has been changed. Their city airport has been redefined as a regional airport, now allows direct flights to other capital city airports, which takes advantage of city airports proximity to the city. As the development of Asia city-to-city airport pair flights, this study focuses on analyzing market catchment area and distribution of a metropolis s two airports for regional city-to-city airport pair flights. This study integrates empirical data of time values in analytical market area approach. Analytical formulations are developed for estimating market area boundaries of a metropolis' two airports (one major international airport, one minor city airport). This study also uses continuous network approach to estimate the catchment area and market size of the city airport for city-to-city airport-pair markets. A case study with airport-pair flights among Taipei Songshan Airport, Tokyo Haneda Airport, and Shanghai Hongqiao Airport was provided to illustrate the results and the application of the proposed models. Market catchment area and market size of Songshan Airport for those Asia city-pair markets was determined. Sensitivity analysis and scenario analysis were also discussed. In addition, it is envisaged that the results of this study not only provide a better understanding on how to estimate market catchment area of a metropolis's two airports but also may shed light on city airport development.