Originally Posted by Bluehen1

B010. (1999) If you wanted to take a three stop direct flight air tour across America from New York (LGA) to Los Angeles aboard a 737-200, only one airline offers such a service. Identify that airline and the three enroute stops made along the way. And if you’re really an old timer, go ahead and see if you can still remember the aircraft type.

The last stop before LAX was COS, I believe.

And I do believe you would be correct, Sir! Here's the schedule: (Note the 15 minute stop times - exceptionally brief by 1999 standards)

Access Air ZA 21 New York (LGA) 640a-810a Moline (MLI) 825a-905a Des Moines (DSM) 920a-1000a Colorado Springs (COS) 1015a-1145a Los Angeles (LAX) 737-200 Daily