You have to figure out the reason for the delay.
Disclosure, I'm a very frequent flyer with AC status. Been to Europe 15 times in the last 18 months and only had one flight delay that was caused by a mechanical issue with the inbound plane. I was in London but they got me on a flight leaving a little later and I made it out that day.
Usually with International flights (I'm assuming trans-Atlantic?), you've got one flight in and one flight out the same day. And it's the same plane.
If there were weather issues, that screws everything up which clearly wouldn't be the airlines' fault. If there are mechanical issues, yes, a pain in the butt but who wants to be over the Atlantic in a plane that they put some duct tape on to get it going? Take your time, fix it… I'll be at the pub.
With some of the security issues, I just assume that there is a potential for delay whenever I'm traveling.
Usually flying through a hub like London, Paris or Frankfurt, you will have options if your flight is cancelled. If you are going through a place with one a day routes back home… like Zurich or Munich or Copenhagen, you are crossing your fingers on the weather, mechanics and security.
Where were you going? And any other circumstances?
Ya I get this. I've flown on other airlines to the same/similar cities in Europe as availability allows with minor delays due to weather crew etc. AC lately - twice to Heathrow delayed 16 hours & 24 hours and once to Rome 24 hours all a mechanical explanation. I'm fine with not flying on a plane that's not going to make it for mechanical reasons but the frequency is crazy lately. No idea about the background reasons - less planes in the fleet, planes getting older requiring more maintenance, heavy route. All I know is it's a pain having to reschedule everything on the other end.
Thanks for sharing - it is interesting to hear other's experiences being smoother.