As part of the US Airways huge decrease in service from their Las Vegas hub, the following routes they served from Canada are being axed:
Las Vegas – Edmonton CANCELED eff 16DEC09 (currently 1 Daily Express)
Las Vegas – Toronto CANCELED eff 23NOV09 (currently 1 Daily)
Las Vegas – Vancouver CANCELED eff 01DEC09 (planned resumption from 16DEC09, shelved)
(Source Airline Route Updates)