That's relatively rare on routine domestic flights compared to Amtrak outside the NEC. To pick a completely random data point: there were 5 trains between Seattle and Portland yesterday. 501 Cascades left 2 hours and 48 minutes late. 517 Cascades left 1 hour and 18 minutes late.
Day before yesterday was better. The 501 was only 22 minutes late, but arrived 44 minutes late. The 517 left 10 minutes late and arrived 34 minutes late. The 507 left 10 minutes late and arrived 28 minutes late.
But Monday was worse again. The 501 left 26 minutes late, arriving 21 minutes late. The 11 Coast Starlight left 58 minutes late, arriving an hour and 20 minutes late. And the 517 Cascades left 39 minutes late, arriving 56 minutes late.
I can't remember the last time I had a routine flight between nearby cities delayed.
==I can't remember the last time I had a routine flight between nearby cities delayed. ==
My brother-in-law had a flight from Chicago to Cincinnati (1h and 15min flight time) cancelled on Friday. Shorter flights don't gain as much altitude and tend to use smaller planes so they are more impacted by weather.
More broadly, through November, flights have been on-time 78.7% of the time in 2018 [1]. Keep in mind that on-time can still be as much as 15 minutes late.