Ryanair Holdings issued a stark assessment of the threat to airlines as they seek to rebound from the coronavirus crisis, saying it's concerned that a series of local lockdowns followed by a second wave of infection will hold back the recovery from the pandemic.

Ryanair Holdings Chief Executive Officer Michael O'Leary said he won't take delivery of Boeing's 737 Max jetliner until summer 2021 as air travel claws its way back from the coronavirus outbreak.