Personally, I could never live with myself if my child were injured or killed because I wouldn't fork over the $300 or whatever for her to be in a safe seat. I know the chances are relatively slim, but I'm just not willing to take that chance with my child. I figure if they government requires me to strap her in for a 25 mph trip around the block, she should be at least likewise secured at 500mph. We have a very light carseat for airplane travel (Cosco Scenera) and always take it.