Originally Posted by
ChrisA330
PY Flex gives you the ability to upgrade at anytime should space be available, whereas PY Lowest you're limited by your upgrade clearance window. It's possible that an upgrade is available right now for PY Flex.
I'm more curious how you've found PY Flex for only $400 more.
My flights when booked in January were definitely between $400-$500 each way between the two PY fares. I just checked and it's $6000 difference each way!