It has been a bit slower the last couple times I have flown although I expect it this time of year. In fact my trips into and out of Ontario this week were a lot fuller than I expected (one was result of a cancelled flight where they switched the passengers to our flight).

According to the Bureau of Transportation Statistics, it looks like February is the slowest travel month for airlines.

http://www.bts.gov/press_releases/20....html#table_02

Since Easter is early this year, you'll start seeing more full planes sooner than you'd like....