44. Not including Alaskan or Canadian airlines, identify ten airlines that were still operating DC-3s within the continental United States

Per jrl767: Okay, here's my Top Ten list:

1.Central
2.Continental
3.Frontier
4.Lake Central
5.North Central
6.Ozark
7.Provincetown-Boston
8.Southern
9.Trans-Texas
10.West Coast

Pretty good, J. You've got nine of the ten (There are actually eleven but 10 is a nice round number...) So - one of them is wrong. Just to keep it interesting for you, can you determine which one is wrong and which one (or two if you like) are missing from the above list?
HINT: Both as yet unlisted airlines operated exclusively east of the Mississippi

Per jlemon: I believe we can add Northeast Airlines to this list.....

I believe you can, JL! Now then, any thoughts on the single incorrect entry from the list above as well as the other DC-3 operator not listed?

Per jrl767: I'll speculate that PBA was an erroneous guess

Right on, J!

The answer to the other airline lurks somewhere in the subsequent posts...