Together, 坐 (sit) + 飞 (fly) + 机 (machine) creates the logical and intuitive phrase “to sit in a flying machine,” which is exactly what you do when you take a plane.
The most significant cultural insight from 坐飞机 comes from the verb 坐 (zuò). In English, we use a variety of verbs for transportation: we “fly” in a plane, “ride” a train, “take” a bus, and “sail” on a boat. Chinese simplifies this by using 坐 for nearly all modes of transport where you are a seated passenger.
This reflects a focus on the shared physical action of the passenger—sitting—rather than the specific action of the vehicle. This is a key linguistic pattern for learners to master. The main exception is for vehicles you stand in (like a crowded bus, where you might use 站 zhàn) or operate yourself (where you use 开 kāi). The widespread use of 坐飞机 in modern China also reflects the country's rapid economic development, which has transformed air travel from a rare luxury into a common experience for millions.
坐飞机 is the default term used in virtually all everyday situations. Whether you are booking a ticket online, chatting with a friend about vacation plans, or telling a taxi driver you're heading to the airport, this is the phrase to use.