Flight might be rescheduled, who to trust?

Question

I have a booking from CPH -> LHR -> JFK -> RDU booked with American Airlines. In the AA app the first leg appears as rescheduled meaning I will miss the long leg. I called AA and they confirm it is rescheduled and offered to find alternatives but because of limited capacity they suggested I call British Airways who is the operator of the first flight. British airways says the plane leaves on time and there is no reschedule. On the airport website the plane is also listed as "on-time", in fact there exists no departure for the rescheduled time.

Should I trust the operator of the actual plane (BA) or the company I made the booking with (AA)?

Details:

• LHR airport website shows the original arrival time.

• all three legs on same itinerary, but i would strongly prefer not arriving delayed

• flight BA811 from CPH->LHR 7:30am 8th of July

• rescheduled time is 9:14am which does not match any departure from CPH

AA app shows 9:14:

BA website shows 7:30

Answer 1

This is indeed quite odd. I'm suspecting it's some error in AA's scheduling data for code shares. All other websites show the flight on time. Even AA initially does if you do a route search (See below).

The weirdness only happens if you click through to "check status" where it indeed shows the odd screen that makes little sense including "Flight Status not available" and "departed".

They also didn't bump you to a different flights: there are only 4 flights from CPH to LHR on July 8 and none goes anywhere near that time

There is 95% chance that AA is wrong, everybody else is right and you will be fine with your original plan. If you want to make sure, you can call AA and insist on resolving this. "BA operates the flight and they say it's on time as booked. Why do you say otherwise? What is the source of this discrepancy?".