- Alaska Airlines canceled 230 flights on Sunday and Monday, with more expected this week.
- United Airlines also canceled 270 flights following the FAA's directive.
- It comes after an Alaska Airlines Boeing 737 MAX 9 lost a plug door mid-flight.
Alaska Airlines said it's canceling 230 flights after the Federal Aviation Administration grounded certain Boeing 737 MAX 9 jets.
170 of the cancelations were on Sunday, while the airline expects more through the first half of this week.
It added that the grounding "has significantly impacted our operation."