I think it's more like you plan to sleep over at Eve's house, but visit Bob on the way. As you drive to Bobs house, you run into a huge forest fire, so you turn back and go to Eve's - which was always your ultimate destination, but in this case you failed to visit Bob. (Also - Addis Ababa is Ethiopian's hub - so it makes sense for regional flights with connecting legs to terminate there)

Was my interpretation as well. In this case ultimate just means "where they ended up".