I'd say it's the LH
340 to Portland. Can't think of any other 340 series 300 that would overfly Seattle -- Cathay has one into Vancouver from New York but it would not overfly SEA
. Also, LH
340 flights to the West Coast (LAX
) would not pass over SEA
. Then it has to be the PDX
flight, still 210 km out so starting or just about to start descent.