Their captain had more than 30 years of flying experience - but he had only recently started to pilot the type of plane they were in.
This meant he had not passed the necessary low-visibility training. After making the unsettling announcement at the end of the 300 mile journey, the captain flew back to Cardiff airport instead.
Stunned: Passenger Cassandra Grant was on the plane Cassandra Grant, 29, said: 'We were about 20 minutes from landing, when the captain said: "Unfortunately I'm not qualified to land the plane in Paris. We'll have to fly back".'
She added: 'It was amazing. The whole thing beggars belief. The captain apologised but said it was down to his qualification status.'
Miss Grant and her fellow passengers on flight BE1431 had already been delayed for three hours by fog at Cardiff International Airport on Tuesday morning. Luckily, by the time the plane returned to Wales, the runway was clear. Miss Grant added: 'There were a lot of puzzled and disappointed people on board. 'When the pilot said he couldn't land the plane we all thought: "Pardon? You can fly a plane but you can't land it?"
'Everyone was pretty appalled but there was some concern that the pilot wasn't fully qualified.
'I would expect an airline pilot to have every qualification possible - then a few more.
'If he couldn't land in the Paris fog what would have happened if it was foggy back in Cardiff?'
Yesterday a spokesman for Flybe stood by the decision taken by its unnamed captain.
She said: 'He has relatively recently transferred his type-rating from a Bombardier Q300 to a Bombardier Q400.
Fuente: DailyMail Online