Yes, I could now explain how to use ITA Matrix commands with
specific fare codes which would help you find these fares but that's just unnecessarily complicated.
Not exact matches
The rules vary among airlines and are based on the
fare code of your ticket,
specific routes, the market price of airfares, and whether you booked directly with the airline.
For $ 25 per flight (on select, but most, airlines I'll monitor the award space in either economy, business or first class, or a
specific seat assignment or
fare code.