Originally Posted by ntrader
To explain, we are 70 and only fly about once a year and are on our way to Lisbon to catch a cruise. While this isn't a big deal to most folks, it is to us and we really appreciate your patience explaining the details to us.
Enjoy the trip. While interlining can be often be a pain with switching terminals, going through security, and whatnot, you probably picked one of the easiest major airport interlines in the country.
UA <--> CO at LAX is really quite painless.