This is the 16398th most frequent Korean word.
비행시간은
"Flight time."
Here, '비행시간은' refers to the overall duration of the flight in terms of time.
비행시간은 얼마나 걸리나요?
How long does the flight time take?
This usage of '비행시간은' indicates the actual measured duration of the flight compared to the expected time frame.
비행시간은 예상보다 짧았습니다.
The flight time was shorter than expected.
In this sentence, '비행시간은' highlights the significance of the flight duration as a consideration in planning travel.