There are 1,004.86 miles from San Marcos to O'Hare International Airport (ORD) in northeast direction and 1,157 miles (1,862.01 kilometers) by car, following the I-44 E route.
San Marcos and ORD Airport are 18 hours 5 mins far apart, if you drive non-stop .
This is the fastest route from San Marcos, TX to ORD Airport. The halfway point is Reeds, MO.
San Marcos, TX and ORD Airport are in the same time zone (CDT). Current time in both locations is 3:57 am.
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