Nonstop
Direct
noun, の adjective, verbal noun
If you think about direct going (aka transportation) how would you make it better? You'd make it so everything was nonstop and direct. Just imagine how much nicer it would be if every airplane you took was direct and you never had to stop. So nice!
Note 直行 is commonly used in business settings to describe traveling directly to a destination without making any stops, like visiting a client’s office straight from your home.
This is a jukugo word and uses the on'yomi readings of the kanji. The ちょく of 直 is shortened with a small っ, though, so make sure to take note of that.
入り口に直行して下さい。
Please go straight to the entrance.
これは、ニューヨーク直行のフライトですよ。
This is a direct flight to New York.
後でトイレに直行した。
I went straight to the toilet afterwards.