The US carrier has been waiting for 13 of the wide-bodied Dreamliner aircraft that it expected this winter, chief revenue officer Vasu Raja said.
Without them, “we simply won’t be able to fly as much internationally as we had planned next summer, or as we did in summer 2019”.
Dreamliner deliveries have been delayed for more than a year as the aerospace manufacturer has struggled to correct production problems.
Boeing has dropped the 787 production rate down to two per month.
Flights to Edinburgh and Shannon have also been cancelled, the US carrier said.
In October, American Airlines posted its smallest quarterly loss since the pandemic began but also warned that oil prices were taking a toll.
“A recovery is underway but there are bumps on the runway and more turbulence to navigate that had been hoped for,” AJ Bell financial analyst Danni Hewson said.
- George Russell