Originally Posted by moondog

26. (No Specific Year) Name two U.S. airlines that each operated the DC-9-10 and the 737-100 variants at the same time.
CO is one of 'em

Okay, let's try Aloha for the other (noting that Air Cal is out of the running)

Nope, it's not Aloha which never operated the DC-9-10. It operated a different rear-engined twinjet...

28. (1986) This airline, which actually did exist and actually did operate limited scheduled services with much smaller mainline jet aircraft, is listed in my springtime North American OAG as offering once weekly nonstop F/Y configured 747 services between the following cities and Honolulu: JFK, ORD, IAH, DTW, MCI, MSP. Although these flights apparently never came to fruition, they are nonetheless still published as actual sellable flights in the OAG without any sort of addendum. Can you identify the airline we’re referencing here?

Tower Air

It was not Tower Air. It should be noted the airline we're looking for was planning to operate its 747s with a proper First Class cabin.

Please, guess again!