prepositions - is "Where are you going to?" correct

— Where are you going?
— I'm going to Paris.

vs.

— Where are you going to?
— I'm going to Paris.

I'm pretty sure the first one is correct, but what about the second?

Answer

The “to” in “Where are you going to?” sounds superfluous to me just because “Where are you going?” is perfectly fine and I cannot think of any reason to add “to” to it.

The reason why “Where are you going to?” sounds strange is not because the sentence ends with a preposition. For example, there is nothing wrong with the sentence “Who are you talking to?”