欠航 and 中止: a canceled flight or sailing and a canceled activity
Compare cancellations of flights and sailings with cancellation of an event, limiting each statement to the service or activity named.
A scheduled flight or sailing does not operate
欠航, read けっこう, means cancellation of a scheduled flight or sailing. 強風のため、朝の便が欠航しました。 says that the morning service was canceled because of strong winds.
島へ行く船は欠航です。 says that the sailing to the island is canceled. 欠航 is not limited to aircraft.
Canceling or stopping a broader activity
中止, read ちゅうし, means canceling or stopping a planned or ongoing activity. 屋外の催しを中止しました。 says that an outdoor event was canceled.
飛行機は欠航ですが、会議は中止になっていません。 says that the flight is canceled but the meeting is not. Transport and the event may have different statuses.
The specified service and the next action
朝の便は欠航ですが、午後の便は運航予定です。 says that the morning service is canceled but the afternoon service is scheduled to operate. Scheduled operation is not already completed operation.
欠航が決まったので、別の移動方法を調べました。 says that another means of travel was researched because cancellation was confirmed. It does not establish a replacement booking or compensation.
Are all services canceled in 朝の便は欠航ですが、午後の便は運航予定です。?
Show the answer and why
No. The morning service is canceled, while the afternoon service is scheduled to operate. Separate its actual operation from the stated plan.