Originally Posted by
ABZSimy
If you have a connection on the same reservation after arriving in the US, surely it’s the boarding pass for the connecting flight that is the important one, which should have pre check indicated on it in any case? Just trying to understand how you would use your LHR-US BP during a US domestic connection, after that international segment was flown.
Your expectation that this has been carefully thought out and with IT to match is quite interesting. If there is a USA city on your boarding card you get the pre-check, if eligible and that would have also been printed on the BA issued boarding pass from say IAH to AUS. In addition some BA codeshare routes involve TSA security via pre-clearance, for example DUB.