A What an awesome result: you got a shabby arrangement to Las Vegas by tolerating a change of planes in Calgary, and WestJet's mishap is your increase. You have been rebooked on a constant British Airways flight from Heathrow to Las Vegas, which would have taken a toll at any rate twofold what you really paid to the Canadian carrier.
WestJet has propelled a yearning system of flights from Gatwick to key Canadian urban areas this mid year, and is putting forth greatly great admissions to a scope of US destinations. Yet, the armada of Boeing 767s it bought has encountered a lot of getting teeth issues; when I flew out in May from Gatwick to Toronto, there was an unexplained two-hour delays. I have been reached by various individuals after longer defers than that.
Were I in your (lucky) position I may protest to WestJet about the postponement in telling you; they may have known before that there was an issue, and maybe could have advised you. Also, I would request a discount of costs acquired getting from Gatwick to Heathrow; the carrier should have given you with a ticket to the transport association. Yet, by and large I'm inspired that WestJet figured out how to move you onto the BA takeoff, which would have been entirely full as of now of year.