Other posts have referenced that Southwest is now showing flights in to EWR based on their ATA "codeshare" but now ATA is showing scheduled flights out of CLE via their codeshare with Southwest. As an example, I just searched on ITA for flights to SFO and ATA popped up as cheapest. Interestiing I thought, so I clicked for more information. Sure enough, it was SW to MDW and ATA to SFO. This is great for vacation travellers & I am unsure as to how good it is for us FFs unless it drives down fares across the board.