Delta and Continental will ship dogs when it is hot because the cargo holds are climate controlled and they move the dogs to and from the planes to the terminals in air conditioned vans. As far as I know, delta and cont. are the only airlines that offer this special "summer pets" service and it's only offered at their major hub airports. the quote I got from Delta from missouri to South Carolina was $329 (large puppy in a large crate), plus the cost of the crate. Since i was getting two pups, I couldn't afford it. I found a shipper using Uship.com who promised me that he would pick the pups up and deliver them directly, although my pups were not his only passengers. with stops, I should have had my pups in 20 hours, max. It ended up being the most stressful and worrisome 44 hours of my life (well, almost....). they did arrive safely and happy but I would not go that route again. I'd either fly them or go with a dedicated shipper. The quote I got for dedicated shippers ranged from $900 to $1400.