Giving Scotland the power to slash Air Passenger Duty could suck business out of North East airports, it is feared.
Graeme Mason, Planning and Corporate Affairs Director at Newcastle Airport, said chiefs are now lobbying MPs to ensure the levy remains level across the border.
It is thought slashing or abolishing the tax in Scotland under devolution plans could save the average family hundreds of pounds on a long-haul flight.
Newcastle Airport, which employs some 3,200 people, will now launch a campaign against changes to APD.
“Obviously, the referendum has been entirely a matter for the people of Scotland but now they have voted, we have to make sure devolution to Scotland doesn’t damage our region,” said Graeme Mason.
“We are making representations to the Government and all political parties that further devolution should not include the power to vary or abolish APD.
“There is already competition between airports in the North of England and those in Scotland.
“Newcastle Airport is a strong and successful regional airport and can certainly hold its own in this competition provided there is a level playing field.
“The abolition or reduction of APD in Scotland would give airports in Scotland an unfair advantage.”