CALGARY — WestJet is warning customers after uncovering a **** involving a deeply discounted airfare offer for travellers headed to an upcoming conference in the United States.

The ******* says the **** advertises return flights for up to 50 per cent lower than fares available through the WestJet website.

WestJet says as many as 100 conference-goers accepted the offer and paid for the airfare only to discover their ticket was invalid because it was actually bought with a stolen credit card.

The ******* says it has turned over information regarding the scheme to ******.

The latest fraud aimed at WestJet follows a telephone **** that involved fraudsters selling questionable holiday packages and suggesting those being called had won 999 WestJet dollars.