Originally Posted by
sipples
BA has a fuel surcharge, and there's also a premium cabin tax when connecting through Heathrow. JAL also has a fuel surcharge. That's why there's such a high price.
But there are many other routings. For example, what about Turkish Airlines the whole way, via Istanbul? That's a faster routing than via LHR anyway. (It looks like only Korean Air via Seoul is much faster.)
But the OP was trying to redeem an award ticket using JMB miles. So choice is actually limited.