While airlines are filling their planes with passengers, the struggle to keep their pilots in the cockpits is a deepening crisis in the global air travel business, aviation experts are saying.

'With the advent of low-fare airlines, really you've just become a glorified bus-driver.'—Bill Tompkins, flight-school student

The shortage of commercial pilots flying the skies above Canada and the world over is so serious that the International Civil Aviation Organization predicts at least 15,000 new pilots will be needed every year in the next two decades. Canada and the U.S. will need at least 60,000 new pilots by 2020.

For Canadians, massive retirement, competition from the air force and foreign airlines, and low salaries are among the factors contributing to a general fading of the romance of the skies.

Flight classes at the Algonquin Flight Centre in North Bay, Ont., still have too many vacant seats, the school's owner, Stefan Corriveau, told CBC News.

Corriveau said that an airline in the U.S. last month had to cancel four per cent of its flights because no flight crews were available. He worries for the future of pilots at home.

"I think those problems will come to Canada," he said.

Although Corriveau said he knows he can handle more students to train for the major airlines, he said the flight business has lost its appeal to a younger generation discouraged by low starting salaries and sky-high training costs.

'Salaries are way too low'

"The salary issue is a very sensitive issue for a lot of pilots and in Canada right now, the opinion of many is that the salaries are way too low," he said.

To earn the minimum license required by commercial airlines at similar flight schools, students such as Bill Tompkins have to pay as much as $60,000, while starting salaries often barely crack $30,000.

"With the advent of low-fare airlines, really you've just become a glorified bus-driver," Tompkins said. "They've just cheapened it. For me, it's still there — there's a bit of magic, but the romance of flying is gone."

Travis Griffin graduates next year from the school, but he'll return to his native Ireland to work, where he can make a more comfortable living.

"It's 50,000 to 60,000 euros to start off, and then you get benefits on top of that, so it's better at home," Griffin said.

European and Asian airlines flush with cash are also coming to Canada and luring away home-grown pilots.

Air forces want to retain pilots

The military, meanwhile, is working hard to retain the young pilots it has trained in the air force. Before Jack Desmarais retired after decades of flying 747s for Air Canada, he began his career in the military. Many of his colleagues also learned their skills in the air force before later turning commercial.

But now, air forces around the world are giving better financial incentives to keep their pilots in uniform.

CBC workplace specialist Frank Koller said baby boom pilots are also retiring quickly, and that the airline industry has still not recovered pilots who left after the economic turmoil immediately following the Sept. 11, 2001, attacks in the U.S.

He said some airlines, such as Air Canada Jazz, are trying to curb the pilot shortage by taking young pilots fresh out of flight school and mentoring them on the job in the cockpits. Although there are safety concerns, Koller noted that it's been done for years in Europe.