The problem for both UA
since the mid-1980s has been the lack of slots. If NRT
didnft have slots problem, NW
could base more 757s and fly them to many of the medium-sized cities in Asia within reach from NRT
and this does include far south as Vietnam as the 757 does have legs for it. NW
had a short-lived KIX
flights with DC-10 in the late 90s, therefore, I believe UA
have rights to most countries to Asia from Japan except the number of flights to US carriers to China is limited. Therefore, UA
puts the aircraft/slots on where it can make the most revenue.
has started abandoning its 5th freedom routes and transferring it to longer-haul travel. This year SFO
route eliminating an NRT
and a second daily NRT
was started. Next year an extra NRT
flight will start instead of NRT
. Also UA
no longer needs to fly to PVG
can do the flying for them. NRT
could be discontinued all together in the future in favor of OZ
picking up the frequencies for the late afternoon/evening time slots.
obviously has to use NRT
as a focal point because it doesnft have a wide-ranging codeshare arrangement with carriers in the region, at least currently, nor the aircraft available to do non-stop US to Asia.