Union leaders fear airport jobs could be lost soon unless the government gives support to the aviation industry.
Unite said all UK airports are being affected by the impact on travel caused by the coronavirus crisis, including Glasgow.
An estimated 1.2 million UK workers rely on aviation for their employment, many of them in the airports, airlines, retail, services and transport jobs associated with air travel, according to research by the union.
Glasgow Airport supports 8,200 jobs and generates £590 million for the Scottish economy, the report points out.
And it explains that Heathrow supports 190,000 jobs across the UK and generates an income of £9.7 billion for the surrounding and national economy,
Unite assistant general secretary Diana Holland said: "Airports are hubs for massive economic activity for our towns and cities, supporting jobs from cabin crew and ground handling to engineers and cleaners.
"But they are facing huge challenges at the moment and need urgent assistance to secure a future where they can continue to provide important routes and support millions of direct and indirect jobs.
"To lose them or see them diminish as employers will open up huge holes in local economies the length and breadth of the country.
"It is crucial that regional airports are supported by the government to ensure that regional connectivity and local economies are not irrevocably damaged with mass job losses, especially in those parts of the country where they are a major employer or the heart of the economy."
