Moreover, another reason that these services have been gaining more overseas tourists is because public transportation such as trains and route buses are not available when an airplane takes off from or arrives at an airport that offers around-the-clock services between midnight and early morning.
また、24時間運用の空港を深夜から早朝にかけて発着する場合、鉄道や路線バスなどの公共交通機関を利用できないことも、海外旅行客の利用を伸ばす要因となっている。