I’ve been checking various flight options on ITN and was surprised to find that a flight’s available seats in a particular class change depending on the destination. It makes sense from a revenue management perspective, but it reduces the value of ITN for predicting upgrade/bump possibilities for us! Of course ITN is still useful, but now I check a few flights to be sure that I get a good idea of how full the flight really is!

(More seats available only to MSP)
12/23 NW1973 FAR-MSP...... P9 F9 Y9 B9 M9 H9 Q5 V5 L0 T0 K0
12/23 NW1973 FAR-MSP(-CVG) P9 F9 Y9 B1 M0 H0 Q0 V0 L0 T0 K0

(More seats available only to MSP)
12/23 NW3012 FAR-MSP...... Y9 B9 M9 H9 Q9 V9 L9 T9 K8
12/23 NW3012 FAR-MSP(-CVG) Y9 B0 M0 H0 Q0 V0 L0 T0 K0

(Less seats available to MSP in expensive classes more seats in cheap classes)
12/23 NW3004 ABR-MSP...... Y4 B3 M2 H2 Q2 V0 L0 T0 K0
12/23 NW3004 ABR-MSP(-ATL) Y7 B4 M2 H0 Q0 V0 L0 T0 K0
12/23 NW3004 ABR-MSP(-MCO) Y7 B5 M3 H0 Q0 V0 L0 T0 K0