Originally Posted by
Often1
You should feel a lot more at ease. UA absolutely will check your bags through to ZRH and if your inbound and outbound gates are as far apart as they could be and you have just missed your inter-concourse train / moon buggy. it will take 20 minutes. UA requires you to be at your departure gate by T-30 for international, so that gives you a minimum of 50 minutes of flex (20 minutes to the UA gate and 30 minutes prior to scheduled departure).
Furthermore the 30 minute rule is just the official rule; obviously not when they close the doors. I board usually 15-20 min before departure on an intl flight. They are not going to require delayed connecting passenger to be there at T-30 min. It just gives UA a disclaimer if they decide to close the door early and ensures that most people get there well ahead of time.