How long does it take a letter to get to Houston to Dallas?

A letter was mailed to me on Friday and it’s the following Thursday and it’s still not here. should I be worried or is that normal?
Answers

James

should take 2 - 3 days

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It's 239.1 miles and takes about 3 and 1/2 hours by car -- depending on the traffic conditions.

DEBS

Psst...It's Friday. You should have gotten it by now if it was mailed a week ago. You sure it actually was?