It seemed like there was a lot more widebody domestic flying during the most recent holiday season as well.

While more of these flights are popping up again like what it was in the late 2000s pre-merger, SFO-DEN doesn't seem to be benefitting quite as much. 763s used to be common on at least one or two flights everyday pre-merger. Now, almost every flight is a 737 or A320, especially with the 752s being retired.