The boss of seat-only firm FlyLolo has apologised after the last-minute cancellation of flights from Glasgow to the Canary Islands.
More than 900 holidaymakers are reported to have had their travel plans disrupted.
Four flights with about 230 passengers booked on each failed to operate to Tenerife and Lanzarote.
Glasgow airport said it was made aware on Thursday night that the charter flights planned by FlyLolo to Tenerife South and Arrecife over the weekend would not go ahead.
FlyLolo passengers were advised not to travel to the airport and to contact the operator for further information.
The company’s chief executive Paul Dendle – former boss of seat-only specialist Avro – said the Glasgow flight cancellations stemmed from contractual issues with the aircraft providers.
He told the BBC: “All clients’ monies are fully protected and held in a CAA trust and refunds will take 10 working days.
“I have been working 18-hour days to try and resolve this issue, but alas it was impossible.
“I apologise for the disruption and disappointment caused, I sincerely feel for the affected clients.”
Dendle said the company was working to notify all those affected.