If you flew Air Canada this past long weekend and got off the ground as scheduled, consider yourself lucky as roughly half of all trips on the largest airline did not or were scrubbed.

The 1,965 delays and cancellations are a sharp contrast to numbers from other carriers like WestJet, Air Transat and Flair, which had lower disruption levels.

Social media posts and pictures of long lines at Pearson International and Montreal had passengers venting Saturday through Monday.

Aviation expert and former Air Canada executive John Gradek says bloated flight schedules and fewer backup planes play a role in such travel chaos.