I flew my dogs cargo because they are large, and we moved to Italy during the summer months and there is a pet embargo during the summer months, where airlines won't fly them, so we came here without them. After the summer, my mom sent them to us by the way of delta cargo. There is no driving them here to Italy, so I did not have a choice. They will be flying back to the states next year. I think as long as you have the vet papers, (you need a health certificate from your vet within 10 days of your pet flying), things should be fine.
People with kids in school, and jobs, can't always put things on hold to drive cross country. Plenty of people here flew with their cats and dogs here to Italy, and you know what, they were all fine!!