When using "at the latest", is this correct usage?
"I will be in around 10am or 11am at the latest".
The phrase at the latest means no later than.
"I will be in around 10am or 11am at the latest" means I will be there by 11 am or earlier.
It is somewhat ambiguous to say 10am or 11am at the latest since 10am is obviously not the latest, 11am is. Many would understand this to mean
I am hoping for 10am, but surely by 11am
Given the tone, I wouldn't even bank on noon.