Original sentence: All Nippon Airways (Tokyo-Haneda, Sapporo-Chitose).China Eastern Airlines (Beijing-Capital, Dalian, Shanghai-Pudong).Continental Airlines operated by Continental Micronesia (Guam).It is located 18 km (11 miles) northwest of central Okayama City and 30 minutes by bus from Okayama Station.Japan Air Commuter (Kagoshima).Japan Airlines (Tokyo-Haneda).Japan Transocean Air (Okinawa).Korean Air (Seoul-Incheon)
Edited sentence: It is located  northwest of central Okayama City and  northwest or 30 minutes by bus from Okayama Station