John Glenn Columbus International Airport (CMH) : Start east. merge onto I-71 S/North Fwy S to Columbus. Merge onto I-270 E/Outerbelt E via EXIT 119A toward Wheeling. Merge onto I-670 W/US-62 W/Northeast Fwy S via EXIT 35A toward Airport. Take the Cassady Ave exit, EXIT 9, toward Airport/Stelzer Rd.Keep right toward Airport/Stelzer Rd. Keep left to ramp for Port Columbus In Merge onto International Gtwy,toward Sawyer Rd on International Gateway.