I tried a search...so Mods please merge if this needs to go somewhere else.

Being of the generation that used to grab the printed airline schedule at the check-in counter for quick reference, does anyone know if there is an actual quick way to see a UA route schedule and flight options...notably when the service is less than daily? It's really frustrating guessing on dates to book or figuring out what seasonal winter get-away flights are available on different days and I otherwise have no idea how to do this now.

Mainly looking for something you could quickly glean from a printed schedule like

(made up) Chicago nonstop to:
AUA 9:30 67 only
LIR 10:00 6 only
MBJ 9:45 357

SFO nonstop to
PPT 23:00 x24

I can piece things together from there, but would like to land on the seasonal routes for winter that don't run daily (internationally as well given this is now more common post Covid). If this is something you can do on the website...would appreciate a quick how to instruction or hint where to look.
Thanks.