Originally Posted by
rylan
And unfortunately you don't see the /WNUP unless you go ahead to try to buy the ticket. Just searching for fares won't show if DL is selling a /WNUP on certain ones, although in general if you see a fare on EF that shows a blank for booking class and B for cabin instead of E, then it can be an UP fare.
In those cases where ExpertFlyer does not show a Fare Class code for the fare in the initial results, you can click the Booking Class icon for the fare on the fight side and that will show the booking class which will allow you to determine which cabin the fare books into.