I also flew from Northern California. I flew American Airlines and they told me that there were two potential problems in terms of getting the dogs on the flight:1. if, on the day of the flight, the temperature was above or below certain limits in any of the stops, they wouldn't let the dogs fly. I don't remember what the temperatures were nor do I know whether these temperatures are different for cats, but the airline should be able to tell you. I flew in March and went through Miami, instead of Chicago or New York, to avoid possible temperatures below the lower limit. It was fine, but it could have been a problem if it was really hot in Miami or BA on that day. But I don't see how having Las Lunas in charge would change that. 2. They couldn't guarantee me a spot in the baggage section for the dogs. They said that it was 1st come, 1st served and if there were lots of pets that day, my dogs might not get on. But they said that rarely, if ever, happens. I suppose it could be a problem if there was a group of people flying to a dog or cat show on your flight, but that seems pretty unlikely. I don't know whether Continental's policies are the same. But, again, I don't see how Las Lunas' involvement would change things. The only reason to involve Las Lunas is for troubles once you reach Buenos Aires. And based on my experience, as long as you have the proper documentation from the USDA, it will not be a problem. Just in case the rules have changed, give the Argentine Embassy in DC or LA a call. I'm actually apalled that Las Lunas was quoting you that price. I cannot for the life of me imagine what "services" would call for such a large amount.