What bingo? You think B6 with Schumer as their defacto ops manager in the NY region is going to have his baby project that is B6 be giving favors away to WN in none other than JFK? WN in JFK will not offer more than what they offer in LGA. WN doing Longer haul out of JFK will be a repeat of what happened in Newark, proably even worse with just a hanful of slots that won't be near to compete with the B6/DL/AA mass service they offer there.
There are a few within-LGA perimeter markets served nonstop by WN such as MSY, MCO, and TPA that have stronger O&D demand (higher PDEW's) from JFK than from LGA, but both DL and B6 already serve MSY, MCO, and TPA nonstop from JFK.
The other within-LGA perimeter markets that WN serves nonstop from LGA have stronger O&D demand (higher PDEW's) from LGA than from JFK.
Here were the number of passengers, number of seats, and load factors of WN nonstop routes out of EWR in 2019:
EWR-MDW - 321680 passengers, 412756 seats, 77.93% load factor
BNA-EWR - 154143 passengers, 211022 seats, 73.05% load factor
EWR-STL - 137480 passengers, 171948 seats, 79.95% load factor
DEN-EWR - 123463 passengers, 143737 seats, 85.90% load factor
AUS-EWR - 100949 passengers, 124295 seats, 81.22% load factor
EWR-PHX - 84901 passengers, 93117 seats, 91.18% load factor
EWR-FLL - 31256 passengers, 34783 seats, 89.86% load factor
EWR-SAN - 31003 passengers, 40643 seats, 76.28% load factor
EWR-OAK - 25628 passengers, 35130 seats, 72.95% load factor
BWI-EWR - 10523 passengers, 17017 seats, 61.84% load factor
EWR-MCO - 8178 passengers, 9154 seats, 89.34% load factor
EWR-IND - 1422 passengers, 1940 seats, 73.30% load factor
PHX and AUS are both outside of the LGA perimeter, and WN had higher load factors on EWR-PHX than on any of its other nonstop routes out of EWR in 2019. WN also had decent load factors on EWR-AUS in 2019.
WN re-entering EWR or adding service to JFK might be a possibility if WN wants to re-add daily nonstop service to NYC from AUS and PHX. WN re-adding Saturday-only LGA-PHX nonstop service and adding Saturday-only LGA-AUS nonstop service are also possibilities.
There are also a few more within-LGA perimeter nonstop routes such as LGA-ORD/CMH that could be added by WN out of LGA if WN acquires extra slots at LGA. WN increasing nonstop service to MDW, DEN, HOU, BNA, and STL from LGA are also possibilities if WN acquires extra slots at LGA.