Sorry, no. Hydrogen though economically nonsensical at least can produce an emissions reduction on the ground. Use solar or wind electricity to make hydrogen. Burn the hydrogen. Voila, low emissions, if high costs and huge thermodynamic losses in the two combined conversion steps.
In the air it s another story. NxOx from the heat of jets, and water vapor are the main emissions from airplanes, dominating carbon by 2 to 1. (Water vapor is a feedback on the ground, but a forcing in the stratosphere or upper troposphere, because it tends to stay there in various forms.) Hydrogen planes, if you could make one with sufficient passenger capacity, would produce more water vapor , and because of higher temperatures probably more NxOx as well. So a Hydrogen plane would contribute *more* emissions* than our current jets.