When flying from Portland, Maine to Taiwan, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Most people fly from Portland (PWM) if they book a flight from Portland to Taiwan. Portland is conveniently located just 2.9 mi from Portland’s city center.
Great question - PWM to TPE just means Portland Airport to Taipei City Taiwan Taoyuan Intl Airport. Now you’ll know what these unique codes when you look for flights! Kaohsiung City Airport (KHH), Taipei City Sung Shan Airport (TSA), Taichung City ChingChuanKang Airport (RMQ), Magong City Makung Airport (MZG), Jinhu Township Kinmen Airport (KNH) are other airports near this flight route and their unique identifiers/IATA codes.