The unfortunate thing is that they can change it at anytime. So you basically have to avoid airlines that have the MAX in their fleet, such as Southwest.
The only major U.S. airline to not currently operate the MAX is Delta. Frontier, Hawaiian, JetBlue, Spirit, and SunCountry also do not operate it.
And Delta has an outstanding order for 100 of them, with delivery scheduled throughout 2025. We'll see if these continued incidents alter that, but I think the inertia is that this is what boeing selling these days. Everyone will have them.
On the other hand, Hawaiian, JetBlue, Spirit, Allegiant and others are all strapped with Airbus A320neos that are going to be grounded shortly due to engine issues related to P&W's GTF engine.
Would be cool if you can get a refundable flight and cancel last minute if it switches to a MAX.
It almost seems it should be regulated. But it also seems the regulations should have prevent a shitshow of an airplane being deployed.