noun
Used in air travel contexts for a planned break in a journey where the passenger leaves the aircraft at an intermediate airport.
途中降機を利用して、シンガポールで一泊した。
I took advantage of a stopover and stayed one night in Singapore.
乗り継ぎ refers to a transfer or connection between flights, while 途中降機 specifically means a stopover where you may leave the airport.
Compound of 途中 (midway) + 降機 (disembarking from an aircraft).