Fair, and someone mentioned that Kayak does display that, but I think you will probably have to move to a different airline to get a different aircraft type (ai

Fair, and someone mentioned that Kayak does display that, but I think you will probably have to move to a different airline to get a different aircraft type (airlines use one common type for most flights on a given route) and the price differences are often steep and/or there are other sacrifices to be made (frequent flyer miles, more expensive bag checkins, etc).