From Detroit airport fly to Saginaw airport then taxi to Saginaw. 2hrs 08min $300. From DTW McNamara Terminal bus to East Lansing then bus to Saginaw, MI. 4hrs 52min $32. From McNamara Terminal bus to Detroit Metro Airport, line 125 bus to Detroit, then bus to Saginaw, MI. 4hrs 59min $25. From Detroit drive to Saginaw. 1hrs 49min $15.