Wizz Air flights to Warsaw and Gdansk, which began in March, continue to prove popular.

BBC: Edinburgh Airport

Wizz Air started up in 2004 and now offers more than 250 routes across 30 countries.

BBC: Glasgow Airport poaches Polish flights from Prestwick

In January, European airline Wizz Air announced it was switching two of its services from Gdansk and Warsaw from Prestwick to Glasgow Airport.

BBC: Passengers at Prestwick Airport

Likewise Wizz Air, a Hungarian low-cost carrier, also said it would expand its Budapest schedules to fill the gaps left by Malev.

ECONOMIST: Business travel

Wizz Air said the move to Glasgow would be more "convenient" for existing customers and was a "a step towards future passenger and route growth".

BBC: Glasgow Airport poaches Polish flights from Prestwick

Eastern Airways, Easyjet, Flybe, German Wings, Lufthansa, Thomas Cook, Thomson (TUI) and Wizz Air have already made changes to their pricing structures, websites and marketing material.

BBC: Airlines include debit card charges in headline price

While looking for other airlines to use the airport - Wizz is the only other significant operator, linking to Gdansk and Warsaw - its operators fear the rise in air passenger tax will hurt business further.

BBC: Prestwick Airport sees drop in winter passengers