Student or Learner
What is more common 'to arrive at' or 'to arrive in' a city, airport and so on?
This is not a good question, northpath. It doesn't matter which one is more common and it does matter where you arrive.
You could ask a more general question about the differences in meaning/use between the prepositions at and in.
Or, if you offer us an example sentence (or pair of sentences) in context, then maybe we can help.