Programs: A3*Gold, SPG Plat, HyattDiamond, MarriottPP, LHW exAccess, ICI, Raffles Amb, NW PE MM, TWA Gold MM
Anything's possible, but it's not likely that DL would copy a new route being started by its partner. Also, DL tends to operate most of its West Coast TPAC flights from SEA or LAX, so SEA-PVG would be much more likely (but I'm not saying it's likely).
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MU is going to restart this route after a decade long absence. If MU, which has a hub at one end, is only now resuming service here how is DL going to make the route work on pure O/D traffic competing against MU and UA?
I know MU will start operating this route from 4/26/2013. A330
Only way you will see China growth from Delta that isn't to a hub(ATL/DTW/JFK/MSP/SEA and LAX would be the only ones that have a real chance) is if the Us and China get an open skies agreement and Delta can get a Joint venture with its China partners (so MU and CZ) That would give Delta hubs in PVG/CAN and PEK in the same way Delta has hubs in CDG/FCO and AMS. (and even then, Delta would only fly the route if they were to make the most money/ have the right aircraft for the route.)
so long story short, you wont be seeing non-hub China growth from Delta any time soon.