Another ex-BOS fare where the CPM isn't great ($.047/mi?), but this sure beats the usual for US-Canada flights. Great availability from 10/16 on through November, at least. Route via LAX (on AC metal LAX-YVR), SFO or IAH for ~3500-3700 miles one-way. One might attempt routing via both IAH and LAX for ~4000 miles OW, but I couldn't get that to work. Exact fare varies based on airport fees, of course. Because of Canadian airport taxes and US CPB fees, the return is ~$210. Or one could take Amtrak or the bus to Seattle... I saw some US availability in the YVR-BOS direction, but not so much BOS-YVR.