How long does mail take to be delivered from America to UK?

It depends on where you sent it from to. I ordered something offline from the UK and I live in NC.

They said with Turbo shipping, Max was 3 days. And it would take 9 business days if it was regular shipping and Handleing.

But, when I was 10, I sent a letter to Georgie Henley and that took 2 or 3 months to come back. But then again, that's a person. Just depends on who and where you are sending it to/from