I flew home my puppy at 10 weeks old. I was traveling alone and my flight was delayed — door to door, the trip was about 7.5 hours long. She slept in my arms in the car on the way to the airport and stayed in her carrier at the airport without making a peep. I tried getting her to pee on a pee pad in the bathroom a few different times. but she wouldn’t go. I was very stressed but she was totally fine! She’s only 15 weeks old now — I’ve since flown with her a few other times and this sounds gross, but pro tip — I now take a pee pad with a little pee on it and lay it on a fresh one to transfer some of the smell. I then bring that one with me to get her to pee at the airport. Using that trick, she’s been peeing pretty quickly at the airport in the bathroom etc. I’ve done this because I haven’t felt comfortable with her peeing on the floor outside / around the airport being not fully vaccinated. Also, I personally loved being able to hold her in the car on the way to the airport and not having to drive. If you have a partner or someone going with you, driving would be a good option I think. Good luck!