Air Southwest has confirmed it will cease operations to Newquay and Plymouth from September, months ahead of schedule.
The carrier - which runs a fleet of four Dash 8 aircraft and employs almost 150 staff - had originally planned to maintain flights until Plymouth city airport is closed in December.
However, the regional carrier will now stop flights from Plymouth on September 14th with some flights to Newquay following on September 30th.
In a statement Air Southwest said: “Despite our original hopes, forward bookings are significantly lower than required and the level of demand is not financially viable.
“The Newquay flights have been reviewed at length, but are not viable on their own without the association with Plymouth.
Newquay routes to Glasgow, Guernsey, Jersey and Manchester will end on September 14th.
Newquay services to Aberdeen, Bristol, Cork, Dublin and Leeds/Bradford will end on September 30th.
This will be the last day of Air Southwest branded flights.
Passengers booked to fly after these dates will be fully refunded, the airline said.
Loss-making Plymouth airport, owned by Sutton Harbour Group, is to shut in December.
Air Southwest, established in 2003, was sold by Sutton Harbour to Humberside-based Eastern Airways last September.
To access all the latest information about the world’s major airlines via one mobile platform visit Airline.City.Mobi.