noun
direct flight; direct service
Refers to a non-stop flight or a direct transportation service without transfers. Commonly used in travel contexts.
東京からロンドンへの直通便は毎日運航しています。
There is a direct flight from Tokyo to London every day.
直通便なら乗り換えがなくて楽です。
A direct flight is easier because there are no transfers.
Compound of 直通 (direct connection) and 便 (service, flight). The word is transparently derived from its components.