Thank you for your reply; definitely much appreciated!
I can see how it works, although it looks weird to me for an airline with open seats left and a ZED agreement in place to leave somebody behind, just because they prefer ZM iso ZL, since in the end it means some revenues are lost for them, doesn't it? Okay, maybe they could have taken 100 dollars from a regular ZM ticket, but why snub at let's say 70 from the ZL and prefer nothing instead?
BTW, do you happen to know how it is done when taxes aren't identical to the ones paid on your ticket, for instance due to a last minute swap from hubbing through MUC to a routing through the more expensive FRA, even though both are in the same milage zone?
FWIW, I've been taken onboard by a certain ZED carrier which doesn't have an agreement with my company, although that was on a regular ZM fare, so maybe that's completely different then?
As a last question: how common are ZL tickets actually? We're entitled to them on a handful of airlines since a few months now, so I am fairly new to this, hence me asking.
Bookmarks