Airlines are all subject to a lot of the same factors, but there are unequivocally better and worse performers in terms of on-time arrivals, by a lot. Take a look at the Air Travel Consumer report for details.
> unequivocally better and worse performers in terms of on-time arrivals, by a lot.
I don't think it's a very good metric to compare them with, though. Those numbers are going to be heavily weighted by conditions at their hub and focus city airports, and speaking more broadly, the cities they serve. Meaning, things that aren't really in their control, and which are either in your control (often, you get a choice of which connecting hub to fly through), or is a fixed risk to you because of your origin/destination, no matter what airline (e.g. if you're flying from/to Orlando in the summer, expect a risk of thunderstorms interfering. Or snow in winter in Chicago.)
If I'm travelling from, say, LAX-PDX, United's systemwide on-time performance is not the data I'd care about, because it's probably affected far more by the conditions in their O'Hare and Newark hubs, which I'm not visiting.
I don't think it's a very good metric to compare them with, though. Those numbers are going to be heavily weighted by conditions at their hub and focus city airports, and speaking more broadly, the cities they serve. Meaning, things that aren't really in their control, and which are either in your control (often, you get a choice of which connecting hub to fly through), or is a fixed risk to you because of your origin/destination, no matter what airline (e.g. if you're flying from/to Orlando in the summer, expect a risk of thunderstorms interfering. Or snow in winter in Chicago.)
If I'm travelling from, say, LAX-PDX, United's systemwide on-time performance is not the data I'd care about, because it's probably affected far more by the conditions in their O'Hare and Newark hubs, which I'm not visiting.