I agree with Paul. I’ve been travelling every week since 1989 and have more than a few million miles with each of the major carriers. In my opinion none are better than the rest, they all have their warts. I personally prefer United as that is who I have most of my miles with and everyone knows me at BWI by name and most of the crews as well that fly out of BWI.
I also manage a staff of 11 that are on the road every week as well and this summer it’s been Northwest that has been struck with the major delays with their pilots running out of monthly time in June/July that are keeping my folks in airports and not getting home until late Saturday (then heading out again on Monday).