How do you say "I'll be a little late"? I've learned that 来不及 means that I can't make something at a specific time. I've most often seen it used in the sense that "I can't make the appointment at all". How do you indicate to someone that you won't be able to make the appointment at the prescribed time, but you still want to meet and will be just a little later?

My best guess would be: "我晚一点到吧。"
There are many ways you can say this. Some examples:


我会迟到一点
我要来得晚些
我会晚来一会儿
我会晚一点到达


You can also say it your way. It is not really necessarily, but I would add 要 or 会. I also wouldn't use the 吧 in this sentence. So something like


我要晚一点到
我会晚一点到