In article ,
OccasionalFlyer wrote:
I'm watching prices for a flight between LAX and YVR in May. The
prices keep jumping all around.

It's hard to predict. I see $269 fares on Westjet, which are pretty
good, so if one of those works for you, buy it.

Air Canada has fairly frequent fare sales, so I'd sign up for their
email newsletter and see if that route goes on sale.

R's,
John