It’ll be interesting to see how it all shakes it. I’m probably most interested in what I’m the world WN has plans for with 16 additional gates.
16 new WN gates will go far toward the goal of 300+ daily departures for sure.
Here are the WN destinations in the contiguous U.S. that WN doesn't currently serve nonstop from DEN:
ALB, AMA, BLI, CRP, VPS, EUG, GSP, HRL, JAN, ISP, LBB, MHT, MYR, PNS, PWM, PVD, ROC, SAV, SYR, DCA, and PBI
While WN doesn't currently have any nonstop flights to ALB, PNS, or SAV out of DEN in its flight schedules, WN is likely to resume DEN-ALB/PNS/SAV nonstop service with WN having operated these routes in Summer 2021.
WN is unlikely to ever add DEN-DCA nonstop service (unless additional beyond-perimeter slot exemptions become available) due to the DCA perimeter rule. WN also already uses its beyond-perimeter slot exemptions at DCA on its DCA-AUS route.
I had previously mentioned the possibilities of WN re-adding DEN-MHT/PVD nonstop service as enough demand was still there for WN DEN-MHT/PVD nonstop service after WN added DEN-BOS nonstop service. A post listing the load factors of DEN-BOS/MHT/PVD in 2013 can be found at viewtopic.php?t=1438013#p21977445
While PBI doesn't currently have any nonstop service from DEN, WN adding DEN-PBI nonstop service might be a possibility as PBI has previously had nonstop service from DEN on F9 and UA.
While GSP hasn't seen any new WN nonstop routes in more than 5 years (unlike most of the other WN stations in the U.S.), WN adding DEN-GSP nonstop service might be a possibility with F9 no longer serving GSP.
I had also previously mentioned the possibility of WN adding DEN-PWM nonstop service with WN having added nonstop service out of DEN to a few other destinations inherited through the WN-FL merger such as CLT, DSM, RIC, and ICT in the last 2 years.
WN adding DEN-BLI/EUG nonstop service are possibilities as these adds would provide easier access to DEN and other markets east of the Rocky Mountains from BLI and EUG.