The bike shop finally unpacked their shipment of bikes so I picked up a box and did a test run for my upcoming flight. I’ve taken a few pics show my process
This box is 9X34X59 inches. With a rack on the fork you may want to look for a box a little wider.
I unhooked the shifter cables at the hub, then.disconnected the front brake cable and tail light wires, then I put a band on the front brake to keep it applied. Otherwise, when you pull the fork, it's like a dog chasing its tail.
Then I took the handlebars off and tied them to the top tube. Jones H bars will probably require a different attachment process.
After that I dropped the fork, wheel, and fender still attached and tied it to the frame. The last picture shows the bike in the box, upside down, resting on the saddle and rear rack. This leaves enough room to put my handlebar bag in with which contains the pedals and tools.
Whether or not this is easier than removing the front wheel and front fender I do not know, but it works for me, and I think this way has less chance of damaging the fork during shipping. The handlebars would have to be removed regardless. Just turning them would be too long a package for this box.
Hope this helps