How far is Alton IL from Woodstock IL?

327 miles taking this route:

1. Take IL-47 SOUTH from Woodstock to I-90 (Jane Addams Mem.) TOLLWAY - WEST. Follow signs.
2. Take I-90 WEST on the Jane Addams Mem. TOLLWAY to I-39 SOUTH. EXIT.
3. Take I-39 SOUTH to I-55 SOUTH to St. Louis in the Bloomington/Normal area.
4. Take I-55 SOUTH to IL-140 to ALTON GREENVILLE and HAMEL off EXIT 30.
5. Turn right off the exit ramp, then follow IL-140 WEST to Alton.