When the Dr. Chadwick is looking from the tower, on the apron stays B737-300. But when there is the shot of exiting passengers the aircraft is B737-200.
After they almost crash into the mountains they turn south, according to the lady flying the plane and the ground controller, but the next shot shows the rising sun and clearly shows their path, over the clouds, heading straight into the sun, which would be east. Then, in the very next shot, two passengers on the right-side of the plane mention the sun coming up and are looking straight out their window. For them to see the rising sun the plane would have to be heading north.
It is apparently a surprise to the passengers that their cell phones do not work. Their plane is above the Pacific Ocean, thousands of miles from land. Cell phones never get signal over the middle of the ocean.
The plane they are in is repeatedly called a "737", which has six seats across and a single aisle (3+3), but all interior shots show a "wide-body" type plane with two aisles and seven seats across (2+3+2). (One viewer commented that the interior shots are of a DC-10.)