Golden West Airlines - March, 1983

This was likely the second-to-last or last timetable from Golden West, as it ceased operations in April, 1983. What's interesting about this timetable is that it features the tails from American, TWA, and United, but doesn't mention American anywhere else.

More about Golden West can be found here.

Hughes Airwest - January, 1978

There are two good resources for those who wish to learn more about Hughes Airwest.  As usual, Airliners.net has a good thread here, and here's an excellent tribute website.  Interestingly, Hughes is now a part of Delta Air Lines, via Northwest and Republic.