Missouri and Florida: A thousand miles away literally and metaphorically.
For reference. Calculated with Google Maps, Faurot Field to the various stadiums. Bold is Big 12, underline is Big Eight, italics are neutral sites.
Arrowhead Stadium 120, Edward Jones Dome 125, Kansas 167, Kansas State 249, Iowa State 279, Arkansas 309, Nebraska 327, Oklahoma State 414, Vanderbilt 435, Kentucky 460, Ole Miss 477, Oklahoma 468, Mississippi State 564, Tennessee 610, Cowboys Stadium (Jerryworld) 616, Alabama 620, Georgia Dome 678, Baylor 695, Georgia 736, Auburn 739, Colorado 747, LSU 775, Texas A&M 780, Texas 792, Texas Tech 797, South Carolina 874, Florida 1008.
UPDATE: Added Colorado.