Quick bit of googling suggests this is DAY-PHL operated by American Eagle which presumably means the PHL-LHR segment is operated by AA? (“Same operator”).
EU261 only applies for flights into the EU if they are operated by an airline based in an EU member state (flights from the EU out are covered on all airlines)
I suspect this means that EU261 won’t help you
Last edited by Buswinker; 6th Apr 2018 at 04:33.
Reason: Typos