I don't remember the airline (maybe United) that flew me from KDEN to KORD during the summer of 2012. This was actually the first time I flew anywhere stateside since the 1990's in anything other than a 737 variant, so I thought it was a unique experience. I remember the kids looking out the window and being fascinated by how high we were compared to the 737's we were used to. Flight was maybe 1 hour 30 minutes.