Originally Posted by gobluetwo

I have no issues sending my itineraries from work email to gmail and having it auto-added to my Google calendar.

On a slightly separate note, the United.com generated .vcs files not being compatible with Google Calendars is a long-running issue. Apparently, the workaround is to edit the .vcs file directly in Notepad or other plain text editor, change instances of "End" to "END" (case sensitive), save, and then import.