United has loaded several new routes to Asia into its schedule. With these schedule filings, all the routes are expected to launch as of the start of the IATA winter season, in late October 2025:

Daily Chicago (ORD) to Beijing (PEK) flights, operated by Boeing 777-200ERs
Daily Chicago (ORD) to Shanghai (PVG) flights, operated by Boeing 787-8s
Daily Newark (EWR) to Beijing (PEK) flights, operated by Boeing 777-200ERs
Daily Newark (EWR) to Hong Kong (HKG) flights, operated by Boeing 777-300ERs
Daily Newark (EWR) to Shanghai (PVG) flights, operated by Boeing 777-200ERs
3x weekly San Francisco (SFO) to Chengdu (CTU) flights, operated by Boeing 787-9s — note that CTU is listed as the airport code, but TFU is now the airport used for long haul flights

All the flights are already bookable, though currently only the highest fare classes are available. One would assume that will change soon, as first loading the highest fare classes is standard practice, though that might not happen… we’ll see!