Surprised this hasn't been mentioned before, but Frontier announced another expansion at CLE to CLT, DFW (both AA hubs with exorbitant airfares), SAN, SFO (along with SJU, announced earlier):
https://www.cleveland.com/travel/202...charlotte.html
CLE will be the 10th busiest station in the Frontier system by May 2023. Let's see if the "seasonal" flights return next season.