United Airlines applied with the DOT for 7 additional US-China frequencies to allow double daily service between SFO and PVG.

United says it seeks to commence the double daily service on or about May 6th, 2015 utilizing B777 equipment.

Proposed times of second flight:

UA891 SFO-PVG 1440-1900

UA890 PVG-SFO 2100-1740

和现在的UA857/858相比，旧金山往上海段的时刻只差两个小时；而回程段现有时刻是早上抵达，增加这一班变成晚上抵达。看起来857/858更适合需要转机的乘客，890/891更适合来往两地的商务乘客， 可以在旧金山工作半天后去机场，在上海结束整天的工作后再返回。

加上东航现在的每天一班，浦东和旧金山之间会变成每天三班。