Agree, the whole process of plane travel and new home is very stressful for a cat and is likely to make her stop eating and be unsociable for a while. Are there other pets in the house? That could be causing issues, as well as all the hubbub associated with the wedding.
Give her a quiet space of her own, with food, water and litter box nearby and hopefully she'll adjust in a couple days. If she has any special foods (cat or human) that she loves, you might want to tempt her with that.
I'm going to move this to Behavior for you...
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Holly, Misty & their friend, Jake, the dog.
Onyx, Callie May, Maggie & Kobi forever in my heart.
Yes, I know I need a new signature pic...someday...