Originally Posted by
CMK10

AA operates 4x RDU-ORD, all mainline too. The last few years it's been either 4x or 5x with a mix of Eagle and Mainline. Incidentally, WN operates 4x RDU-MDW.
I must have caught then on a schedule transition day, you're correct. And that's good news because the RDU-ORD-LHR eastbound dayflight connection will reopen.