Apologies for bike box..that is what certain rail companies provide..only at certain city points and for certain scheduled train times.
My partner has flown several times with his bike via Air Canada over the past 10 yrs. In terms of AC staff, they were quite good and well informed about the bike policy.
I was with him on several occasions when he and I were flying together, but I didn't take my bike along because I had a bike to borrow from someone at destination or due to my work schedule at time, not enough time to bike to justify shipping my bike.