United 867 heavy departed LAX at 12:41 PST, and climbed to FL300. They stepped up to FL320 at 15:24 PST. The flight turned around at 16:04 PST at FL320. Nine minutes later, at 16:13 PST, they descended to FL310. At 16:53 PST, United 867 began their descent to KSEA from FL310. United 867 arrived at Seattle at 16:12 PST. The flight lasted 3 hours and 25 minutes.
Here are actual points of the flight every 30 minutes, the step up to FL320 (just north of Vancouver Island at 5126N 12855W), and the turn around point (at 5441N13329W). The flight flew north on the west side of Vancouver Island and south (the return) on the east side.
Tracklog link - mduell