A hundred times this. If you're flying very rarely and your dates and destinations are set... in my experience there's not even much choice between a lot of air

A hundred times this. If you're flying very rarely and your dates and destinations are set... in my experience there's not even much choice between a lot of airlines, usually 1-3 for a given time. So price is more like 'can I move this one to one day later to save x%' - I don't recall ever just shopping around for different airlines.