Originally Posted by
ThreeJulietTango
E is technically a fare class on every AA flight as it is used for employee positive-space travel. It's routine to see E "availability" even on flights that aren't eligible for SDFC.
JFK-LHR remains the only "international" (excluding the Caribbean) route that can be SDFC'd.
So, it's just a fluke that E is now showing up in EF?