Translation of kneecap in Spanish

At noon we drove back to the tiny airport near the city and a few moments later we were already in the skies. The flight to Saigon, today's name Ho Chi Minh city, lasted more or less one hour.
I hope you can understand my English. I want to study English over the Internet! Sorry for not having written you during the last few days, but I am starting a new job on Monday and gotta relax till than.
We asked for the price and were surprised to hear it: A hundred dollars a night. We were actually happy to hear the high price because we knew that if we would not find anything else there was still a good place to stay in.