Originally Posted by
Jumper Jack
I plan on building a three plus hour layover in LHR which should be enough even with moderate delays but not sure if its too short or even necessary.
Three hours really isn't too much for LHR if you're 6+ months out as the inevitable schedule changes could eat into that gap. If you are intent on booking separate tickets I'd at least double that connection time if possible but that's merely MHO.