Coach Journey is pure BE.
"Coach" s used in AE to refer to a fancy, comfortable bus used for long distance (out of city) travel. HOWEVER, I don't think you can use it (in AE) to speak about a bus trip IN GENERAL -- only if you are specifying the means of transport more specificaly. Analogously, you would say you "flew to Paris" or you "took a plane to Paris", not that you "travelled by Boeing 747 to Paris", unless you mean to be specific about the model of plane, which is odd if you are speaking generally about going from one place to another.
Furthermore, "coach", at least to AE ears, has as its primary meaning "Kutsche". So Coach Journey or Coach trip sounds bizarre. "Coach", referring to a type of bus, is not a commonly used word in AE and I would bet a significant portion of the population would not be familiar with its meaning to refer to a type of bus.
"Journey" is also bizarre here. In AE, a journey is like an odessey or a trip that requires the overcoming of obstacles. It has the sound of an adventure. If you say you "made a journey somewhere", it sounds like you had to cut your way through the jungle with a machete.
"Ride" is not very good here either, as it sounds like too short. This is a longer trip.
I think "Bus trip" is the best here for AE. For BE, "Coach journey" is probably best, and would probably be understood to some AE ears, even though it sounds like "Odyssee per Kutsche".