Hello, I am flying from Charlotte, North Carolina to Portland, Oregon with my pet and was wondering if I had to have a health certificate for her upon arrival??

I have never done it myself. It would be a question for staff. I would call or email well in advance just to be safe

Yes, you must and you need to call your airline carrier asap and ask 1. What is their pet policy 2. If there is even a spot for your pet on that plane, because they typically only allow 3 pets on board per trip

Family pets coming into Oregon from within the US must obtain a Certificate of Veterinary Inspection (Health Certificate) within 30 days prior to entry.