I returned back to ORD from YYC last Saturday afternoon. Upon leaving the ORD area I saw UA an A319 taking off.
I watched this and couldn't understand to see that the landing gear wasn't up until it was well away from ORD and pretty high in altitude. It was a pretty clear day and this was quite visible. Afterwards I saw another A319 taking off but landing gear was retracted quickly after being airborne.
What did I see? Is this something normal?
Any info would be appreciated! Thanks!