PDX-SMF had more than enough demand for daily nonstop service on WN in May 2020, but had weak load factors due to extra frequency on the route.
Here are the numbers for WN PDX-SMF nonstop service in May 2020:
36.02% load factor
1 daily nonstop in each direction on a WN 737-700: 143 seats x 2 x 31 = 8866 seats
WN might be able to be profitable on the PDX-SMF during the COVID-19 pandemic if (a) WN further reduced frequencies on PDX-SMF nonstop service, (b) WN is able to fill the PDX-SMF nonstop flights, and (c) fares on WN PDX-SMF nonstop flights are at normal levels.
There were some other WN nonstop routes that had more than enough demand for daily nonstop service in May 2020, but with extra frequencies and weak load factors, including the following:
ATL-BWI, ATL-DAL, ATL-HOU, ATL-MDW, ATL-TPA, AUS-DAL, AUS-DEN, AUS-PHX, BNA-DAL, BNA-DEN, BNA-ECP, BWI-CLT, BWI-FLL, BWI-MCO, BWI-MDW, BWI-ORF, BWI-PBI, BWI-RSW, BWI-TPA, CLE-MDW, DAL-DEN, DAL-ELP, DAL-HOU, DAL-LAS, DAL-LAX, DAL-MCI, DAL-MDW, DAL-PHX, DAL-SAN, DAL-SAT, DAL-STL, DAL-TUL, DEN-HOU, DEN-IND, DEN-LAS, DEN-LAX, DEN-MCI, DEN-MDW, DEN-MSP, DEN-OKC, DEN-PHX, DEN-SAN, DEN-SEA, DEN-SLC, DEN-SMF, DEN-STL, DEN-TPA, FLL-MDW, GEG-LAS, HOU-LAX, HOU-MDW, LAS-LAX, LAS-MDW, LAS-PDX, LAS-PHX, LAS-RNO, LAS-SAN, LAS-SMF, LAX-MDW, LAX-PHX, MCI-MDW, MCO-MDW, MDW-MSP, MDW-PHX, MDW-RSW, MDW-TPA, MKE-PHX, OAK-PHX, OAK-SAN, PHX-SAN, PHX-SLC, PHX-SMF, PHX-SNA, SAN-SJC, SAN-SMF