I don't think she is being unreasonable. She doesn't work on weekends. I don't either. Neither do many, many people I know. Period. She didn't ask you to come visit her. Your travel plans were not contingent on seeing her. If you want to see her in person, it would be your responsibility to plan your schedule to meet her office hours.

Understand your feelings, but your expectation is not really founded on the reality of her professional boundaries about her work time. This isn't about you honestly. This is her professional/personal boundary that she has set for her life.