Christophe Gagnon considered quitting his avionics studies as COVID-19 crippled aviation, but the 21-year-old stayed in class and now the industry is desperate for more like him to keep planes flying.

Two years after lockdowns nearly grounded the airline industry, repair shops and suppliers are scrambling for students like Gagnon, who received multiple job offers while still at the École nationale d'aérotechnique (ÉNA) in Canada's aerospace hub, Quebec.

The hiring rush is evidence of a sharper than expected recovery in air travel, but also signals a looming labor shortage that is raising costs and could push up repair times as the industry stages an awkward recovery from its worst crisis. Shortages are on the minds of executives at the Farnborough Airshow near London, this year's largest aerospace expo, which starts on July 18.