Spokeswoman Brie Ogle said Thursday that while the airline can understand the threats are generating a great deal of interest, it will not comment on rumors.
A bomb threat believed to be a hoax Wednesday night prompted WestJet to divert a Vancouver-to-Toronto flight to Calgary.
A flight on Tuesday from Toronto landed at Saskatoon following a threat. Police say no bomb was found.
A flight from Edmonton to Toronto was diverted to Winnipeg on Monday because of an unspecified threat.
