Originally Posted by
bldr1k
I am not talking about how non-refundable fares go from $200 to $300 to $150 over time by changing availability of fare buckets. That is fine and airlines have been doing that forever.
I am talking about buying a full-fare (F) ticket that one day costs $1200, then costs $1800, then costs $800 and availability
There are plenty of existing threads on how /UPDI fares work. The fare structure isn't changing, so I'd recommend just using Google Flights fare alerts instead of checking 3 times a day.