First the good news, Delta will add Destin/Fort Walton Beach-New York-LaGuardia nonstops in March, the same month United shuts down its service to the airport completely.
Frontier is moving Chicago-O’Hare nonstops to Tampa over to Midway Airport and dropping O’Hare-Miami nonstops immediately and adding Midway-Fort Lauderdale in its place next winter.
Breeze will be placing brand-new A220 jets on several routes from its Tampa base this summer. Routes from Tampa that will get the new planes include Akron/Canton, Charleston, Huntsville, Louisville, Norfolk, Oklahoma City, Richmond and Tulsa.
The following JetBlue nonstop flights from Florida will see its frequency trimmed through the end of March:
Fort Lauderdale- Atlanta/Aruba/Bogota/Buffalo/Charleston/Chicago-O’Hare/Grand Cayman/Jacksonville/Kingston/Los Angeles/New Orleans/Philadelphia/Providenciales/Port-of-Spain/Richmond/Santo Domingo/San Jose, CR/ St Maarten
West Palm Beach-Hartford
NOTE: none of these flights are being cut outright, but frequencies are being reduced through the end of March and presumed end of the Omicron situation which is leading to reduced staffing.
Avianca is cutting service levels into Miami and Fort Lauderdale for February.
American has like JetBlue, slashed frequency on a number of routes that touch Florida until late March. However, I do not have a full list of those changes.