American Airlines:
I booked a sweet flight on British Airways through London to Barcelona
12 Weeks before the flight, I received a phone call (I missed the phone call, no voicemail)
Four Days Later, I received an email that my flight has been cancelled (and to call a number)
I called the number early in the morning, waited an hour, before calling back laterThis is not the first time that this has happened, notice of a flight change, sometimes a phone call where you need to make a critical decision without being prepared
This sometimes happens twice for a flight, where I receive a call about a changed/cancelled flight in France the night before the return flight back to the USA
(then faced a challenging day at the airport, waiting in lines, waiting for a later flight, taking a connecting flight, etc)
TAKEAWAYS:
Maybe avoid American Airlines, since this seems to happen repeatedly
When it does happen, ALWAYS take the option of staying an extra day and leaving early the next day
I once chose a flight later in the day, waited hours in the airport, in a terminal which did not support my meal voucher, arrived in NYC when the check out counters were closing, barely obtained my hotel voucher, waited a-long-time for the shuttle bus to the hotel, finally checking into a cold room (I’ll remember this Cancellation for a long time, and I wonder why I chose American again)

Luftansa

Overseas flights sometimes go into a hub airport, then shuttle over to the other European City

Major inconvenience, there is the time-spend, the loading of the plane, move lines, sometimes a shuttle, boarding the aircraft which is type of plane which you usually travel on for short trips, kinda dingy (like an old school bus)