Originally Posted by 24left

So here's a data point that I found interesting. In 2 years of flying the YYZ-YVR-NRT route, I've had an occasional delay ex-NRT due to congestion on the taxiways, but I've never had ALL FOUR flights on a single trip delayed.

AC 153 was delayed an hour due to late inbound international aircraft

AC 3 was delayed 2 hours due to late inbound international aircraft

AC 4 was delayed twice for a total of an hour. First was late inbound AC 3. Then we sat on the taxi way (while NRT airport ground crew drove up and down inspecting the runway. Kind of cool to watch but still)

AC 102 was delayed for idiocy: 40-50 pax were stuck in line at the security checkpoint. Apparently CATSA decided not to have enough screening lanes open

.......

Originally Posted by songsc

I recently had all four flights on YYZ-YVR-PVG delayed/cancelled.

AC103 went mech, cancelled, was put on AC100 and overnighted in YVR.

Next day AC25 diverted to ANC due to medical emergency, delayed for 2 hours.

AC26 was delayed by 1 hour due to late inbound, delayed boarding. And my flight to SHA was late by 5 hours, landed only 2 hours before AC26 departure.

AC100 was late for 30 minute due to crew being late. It was switched from A321 to B789 so different crew members were required.

And I recall in another Asia trip, I had all four flights delayed due to de-icing, de-icing, late inbound due to de-icing, waiting for gate at YYZ and frozen aircraft doors.