[arsenal]

Go deerfoot north, and follow the signs that say airport. It will be on your right hand side. Drive down that road (not sure the name) and you will want to turn right again. This should bring you to the terminal, but there maybe one more right turn.
The road does split, you will want to get in your left 2 lanes. It will split again into short term and long term parking. Go into the short term parking area. From the parking garage, it is easy to walk into the arrivals section. You will need their flight number to see what gate they are arriving at.
Find out about what time they are going to be arriving (flight number) and check the calgary airport website to see if they are on time or delayed. This is important, as if you are in short term stay for under 30 minutes, you will get free parking. If you there for about an hour, i think it is like 1 or 2 dollars. Not sure exactly as when I have ever picked someone up, I have been in and out in under 30 minutes.