YUL April 2018 numbers.
Total passengers: 1,482,221 +2.3% (April 2017 was up 17% over April 2016)
Domestic: 537,541 +1.1% (+12% last year)
International: 575,898 +1.8% (+25% last year)
Transborder: 368,782 +4.8% (+11.8% last year)
So a modest increase compared to last year, but accounting for last years' tremendous growth in April, the 2 year growth average isn't too bad.
Easter traffic was during March, plus the 🞵🞵🞵🞵🞵🞵 weather we had in April (freezing rain, canceled flights) can help partly explain the weak numbers.
https://www.admtl.com/sites/default/files/2018/ADM_Statsdet_2018_EN.pdf