I figure this is the best place to ask: If I no-show for the last segment of my BA flight, do I have to let them know? Or would that actually be detrimental?
If I book a BA-flight at the same time which I'll ACTUALLY take, will that raise flags?
(e.g. I have a connection booked YVR-LHR-CDG, but I actually want to fly YVR-LHR-ZRH, so I'm thinking of ditching the LHR-CDG leg and just book a 4k avios flight LHR-ZRH oneway that I'll actually take, which will basically leave at the same time my booked LHR-CDG flight would leave...)