KEY POINTS
  • United Airlines doesn't expect the Boeing 737 Max planes to be ready to fly by this summer.
  • The summer is the busiest season for U.S. carriers and when their revenue peaks.
  • Boeing executives have been telling suppliers and customers that they don't expect regulators to approve the jets until midyear.
A United Airlines airplane takes off at Newark Liberty Airport.

United Airlines on Wednesday said it does not expect that it will be able to fly the Boeing 737 Max this summer a day after the manufacturer pushed back when it expects regulators to sign off on the planes until midyear, more than six months later than it previously forecast.

The repeated delays mean airlines are set to go another summer — the peak travel season for U.S. carriers — without the fuel-efficient planes.