Originally Posted by nystateofmind

There are too many airline that make up Delta but to use US Airways decision of not using the carriers that were acquired by the companies whose liveries they used (so no Mohawk, Empire, and other airlines that Allegheny purchased) that would probably leave for Delta:

1) Delta in widget scheme (a 757 in its original livery would work)
2) Northwest in any livery (once again a 757 or A320 would be most realistic)
3) Western (probably would use a 737-800 for this)
4) Northeast (since they were acquired in 1972 nothing in the current fleet looks like an aircraft they operated unless maybe you go with a 717 or paint a 737-800 just because Delta has a large fleet of them and they serve many destinations)