Originally Posted by
qukslvr619
It's not a matter of buying the most expensive fare to get the upgrade as you imply but that I'm contractually obligated to book into Y to allow for the most flexibility.
How is booking a Y fare more 'flexible' than booking B or M or any other refundable fare, including a fully refundable P fare that gets you a first-class seat? This doesn't make any sense to me, but I could be missing something.