Per YVR Cockroach: 2. Further perusal of your pocket flight guide reveals that as of late 1988, there is only one type of foreign built twin jet serving Las Vegas. A total of two flights are operated into LAS with this aircraft type, each of them by a different airline, and each from a different city. Identify the twin jet, each airline that flies it and each route it flies into Las Vegas.

Too early for the A320 (and too late for the Caravelle and BAC 1-11) so I'm going to guess it was the A300. Continental had a hub in DEN Stapleton then and the other operator would have been Eastern, out of ATL perhaps?

You are definitely on the right track here with the A300, YVR. Continental was one of the operators, but Eastern was not. So then, now all there's left is to identify that last operator and then figure out the correct airport. CO should be easy if it wasn't DEN...

Per YVR Cockroach: This airline’s 1977 ad described “Super Orange 747 Service” to a variety of domestic and overseas destinations. Which airline was it?

The only other 747 operator I can think of that had an orange livery was CP Air. I can't say I ever saw CP using such a slogan though.

CP Air it was! As for the ad, check on This Page.