Originally Posted by
JMN57
To plan to fly two separate, connecting legs on one ticket and in different classes may not be bookable. You can do each WAY in different classes but if you are flying, for example, Houston to LA via Dallas, unless you book Houston to DFW as one ticket and DFW-LAX as another, I don't think you can do it.
This is on one ticket. The app is offering upgrades for either leg, and I'm toying with the idea to spring for the upgrade on the longer leg.