I don't know of any U.S. airline that flies that route. The FAA says that car seats have to be used per the manufacturer's instructions, which is kind of vague, but if the child is within the rear-facing limits, by law, they can't force you to turn it around.
Those infant bucket-style seats can't be installed any other way.
Careful as some foreign airlines won't let you even use a car seat for babies under a certain age. Some like Virgin Atlantic (doubt they fly this route anyway) won't allow the parent to use their own car seat in the cabin!!
Frustrating and I've run into these funky rules that don't let parents fly with their children safely.
Depending on the age of your child, find out if you can at least use the car seat at all on the flight. Rear facing is 11 times safer than forward facing but still, if you can at least get your car seat on board, and not have to check it below, that's a start!
Let's hope that some of these airlines "wake up" soon!
Sorry I couldn't help more
