Open F Seats but no UG Seats?
I am looking at ORD-BOS and the AAgent said my flight (lunchtime flight) has many F seats available (at least 10) but no UG seats. The whole day is wide open. KVS Sabre shows F7 A6 P4. I would have thought there would be more UG availability on a flight like this less than 72 hours before departure. What are your experiences?