What are the differences between "A qué hora" and "A qué horas"?
What are the differences between A qué hora and A qué horas?
Can anyone explain to me, please?
Thank you.
4 Answers
"A qué horas" is also used to mean "at what time" just like "a qué hora". It's one of those regional things I guess, and strictly speaking it's probably a grammatical error.
These regions also tend to use "¿Qué horas son?" instead of "¿Qué hora es?" when asking the time. Apparently that usage in Spain is limited to old nursery rhymes.
I agree with Jason. One of our Spanish speaking members at church used these expressions a couple of weeks ago. He intended to visit me at work, so he asked what time I went to work.
"¿A qué hora?"
Then he asked how long I would be at work by "¿A qué horas?", which I first took to mean "how many hours will you be there?". I now believe he meant "when will you be leaving work?".
At least that is what I thought he meant. I replied accordingly. He came to visit, so it must have worked out.
In my humble opinion, I do believe "A qué hora" is saying at what time.... like At what time to you get out of bed? and "A qué horas" is saying At what time... like At what hours do you sleep? It's more than one hour (horas) vs. an hour (specific). por horas, for example is by the hour (in regarding pay). Hope this helps get the ball rolling with this thread. 
I had always thought that it was because of "Es la una." and "Son las dos." I thought they were the same, as when someone asks the time, it could be either 1 or 2. So, the both can be used.. But it can just be my imagination. 
