I was recently searching for a flight from MKE-DEN and came across a flight that would work the best, it was a T fare on a ERJ from MKE-CLE-DEN. I had searched for a flight that had at least a leg in first, and when realising that I'd be in coach i searched again. Same flights came up, same fare codes came up but this time instead of being $670 it ws $290. Is this a common occourance? I somewhat figured that if all things were the same that the cost of the tickets would be the same.