Originally Posted by
rossmacd
For example: LHR O:AA JFK will bring up all AA operated flights between LHR and JFK, but if there is an IB,AY,BA code that is cheaper than the AA prime code, then this will be shown. Sometimes quite a good way to shave off some money from the fare. Also good when you know on a particular sector you want to avoid a particular operator, e.g. BA due to poor overall product on J longhaul.
Conversely, I use "nocodeshare" when I just want to find out who flies a particular route (useful for redemptions).
I haven't worked out a shortcut for 'operated and marketed by' yet other than O:XX together with nocodeshare - is there a simpler way of doing that?