Oriental Airlines is at Pudong International Airport Terminal 1. The subway only goes to the food court between the 2 terminals, there will be a sign when you exit the subway. It's about a 15 minute walk.
Pudong Airport Terminal 1 (T1) Airlines:
Sichuan Airlines 3U, Mandarin Airlines AE, Hainan Airlines HU, Korean Air KE, KLM Royal Dutch Airlines KL, Air France AF, China Airlines CI, Lucky Air HO, Spring Airlines 9C, Japan Airlines JL, ? Gulf Air GF, China Eastern Airlines MU, Tianjin Airlines GS, China Airlines G5.
Expanded Information:
Pudong Airport Terminal 2 (T2) Airlines:
1, Emirates EK, Fuxing Airlines GE, Dragonair KA, Qatar Airways QR, Northwest Airlines NW, Swiss International Airlines LX, Turkish Airlines TK, Indonesia Airlines GA, Air Macau NX, Finnair AY, Air China CA, Leroy Air B7, United Airlines UA, Shandong Airlines SC, Hong Kong Express Airways UO, British Airways BA, Qantas Airways QF;
2, Philippines Airlines PR, Cathay Pacific CX, Malaysia Airlines MH, Aeromexico AM, Shanghai Airlines FM, Singapore Airlines SQ, Virgin Atlantic VS, EVA Airways BR, Aeroflot SU, Asiana Airlines OZ, Continental Airlines CO, China Southern Airlines CZ, Cebu Pacific 5J;
3, Air New Zealand NZ, Chongqing Airlines OQ, Delta Air Lines DL, Lufthansa Airlines Airlines DL, Lufthansa LH, Air Canada AC, American Airlines AA, All Nippon Airways NH, Thai Airways TG, Air India AI, Hong Kong Airlines HX, Shenzhen Airlines ZH.
References:
Baidu Wikipedia-Shanghai Pudong International Airport Terminal T1?