The boss of US low-fare carrier JetBlue said it was necessary to hire more staff because of the rate at which people are still leaving the industry.
Even if you get the people, they don't have the same experience as someone who was doing that job for 10 or 15 years, so it's going to take longer for them to learn the skills, said Mr Hayes.
He said airlines would approach 2023 more cautiously than they had this year when many airlines, including JetBlue, had to scale back their operations due to the resourcing challenges.
Between the UK and the US will have increased the number of flights it operates from one to five a day by the end of October.
It comes a year after JetBlue entered the transatlantic market, with its first daily service between New York and London Heathrow, and it now has a new daily service between Boston and London Gatwick.
He said JetBlue had only been slightly affected by the Heathrow flight cap, which saw the airport limit the number of passengers who can depart each day to 100,000 over the peak summer months, 4,000 fewer than current levels.