Hello everyone! My Dad and I are planning to leave for another RV trip next Friday the 14th and as usual I will be bringing Cookie (Cookie loves seeing new environments). We will be leaving from San Diego and ending up in Minnesota, exploring as we go of course. However instead of driving back to SD we will be leaving the RV in a storage unit and flying back on the 23rd (Aiming for a United Airlines flight, we haven't bought tickets or anything). This is a method my Dad uses so that we can explore more places without constantly having to start from home. Anyways, I don't want to leave Cookie at home since I don't trust anyone enough to take good care of her, plus she's my partner in crime and I would be miserable without her, as would she. This would be Cookie's first time flying and I've done a bit of research regarding the requirements/restrictions and such (I know it can be different for each airline, I mainly focused on United since we normally fly that airline). I am aware that a health certificate is for sure required if you are traveling internationally, however I did not find anything specific about what documents I would need if I am traveling inside the United States. I called United and the lady on the phone said I wouldn't need anything, I would only need to pay the in-cabin fee of $125 (I could never transport her as cargo, I've heard terrible stories and either way I'd prefer having her close to me). I'm planning to schedule a vet appointment tomorrow so I can receive a health certificate just in case (because if they ask for any documents while I'm in Minnesota I'm screwed). My main question is what documents have you guys needed to provide for your cat when traveling inside the U.S.? It can be any airline, just share your experience. Also, if you have any flying tips or facts that you think would be helpful to me, share it! I would greatly appreciate it!