You'll have to investigate the fleet owned by each airline and pick airlines which pick non-Boeing aircraft. Because pilots trained on a Boeing aircraft can't j

You'll have to investigate the fleet owned by each airline and pick airlines which pick non-Boeing aircraft. Because pilots trained on a Boeing aircraft can't just jump to a different airframe (i.e. origin of the MAX disaster,) or manufacturer without training, a lot of airlines will prefer one over the other. But this will vary with the routes they fly, and how old vs. new their fleet is. If you're in the US, that is going to be very difficult. In EU, its more likely but will depend on the carrier. I think it is next to impossible to accomplish on a per-flight basis, given frequent equipment changes can be.