CoachUSA's TriState/United Limo (a bus company, not a limo service) operates hourly bus service from the bus/shuttle center at O'Hare to Northwest Indiana, including Gary.
Alternatively, you can take the CTA Blue Line train (follow the signs that say "trains to city") downtown. Exit at the Washington stop. Walk three blocks east to Michigan Avenue. Look for the stair case heading down under Michigan Avenue to Millennium Station. From there you can take a South Shore Line train to Gary.
See related links for more information.
926 miles
OHARE airport
Honolulu International Airport has six runways.
Chicago's O'Hare International Airport.
Midway Airport
There is not a direct train from Wrigley to Ohare. There is public transportation, take a westbound CTA bus along Addison. Get off at the Addison blue line train station. Take the blue line to ORD.
About 31 road miles.
Taxi from ohare airport
50 cents to $5
I'm gonna hazard a guess at no.
Yes, long term and short term.
You can not fly from O'Hare airport to Chicago because O'Hare airport is in Chicago.