The Swissôtel in Oerlikon closed up at the beginning of Corona. I noticed that yesterday it had a bunch of scaffolding on it, so perhaps it will return soon. But there are other hotels in Oerlikon, and along the Tram 10 line from the airport through to Oerlikon. There are also a couple of hotels in Rümlang, but those are going to be a bit more hassle to get to as you have to grab the bus.