When Reggie and Becker board the plane for Chicago they start to sit down in a row on the right side of the plane. However, we next cut to a close up of them sitting several rows up and on the left side of the plane.
The aircraft is shown as being a Boeing 767, then a 757, then a 767 again. The 767 is a wide body aircraft with two interior rows. In addition, the seating configuration is of a McDonnell-Douglas DC-9 type aircraft, with two seats and the left side of the cabin and three on the right.