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Originally Posted by ThrowDownYourLeavyScreens
The range for a fully-loaded 77L is only ~10,500 miles.
A nonstop SIN-SEA is quite doable for a 77L. SIN-LAX and SIN-MSP are in the neighborhood of ~9000 mi. A SIN-MSP route would be long but doable, but it would also have the advantage of providing a single connection for the vast majority of the US, and out of DL's major hubs.
SIN-JFK is 9500 mi, and SIN-ATL is 10,000 miles. Is Delta really going to reconfigure at least 3 77L's to an all-J (or mostly-J) configuration to reduce the weight and get a flight going in each direction, plus have one reserve for MX/WX, from the east coast? (Could you imagine the outcry if an all-J 77L got swapped for a Y+J 77L due to MX?)
http://www.gcmap.com/mapui?P=sin-sea...in-atl,sin-msp
I regards to ATL, I agree that would be challenging. For JFK, why would the need to reduce seatin capacity? SQ did SIN - EWR with a full offering of classes (business, economy plus, and economy). What makes you think the 77L is less capable than the a345 on such a route? Again, profitability aside, the 77L should be able to do JFK-SIN as is.