If people are expecting your arrival (or the arrival of a shipment) ... and you’re going to be late ... you usually have a choice: let them know you’ll be late, or just arrive late.
On-time arrival might be out of your control. Nothing you can do.
But communication — courtesy — is something you can control.
When someone is late, it’s a frustration. When someone is late and silent on the matter, it compounds the error.
Instead, do the uncomfortable thing and let them know before it happens.