Frontier Airlines reportedly plans to launch the following services (Airline Geeks, 11-Apr-2021):
- Chicago-Dallas Fort Worth: Four times weekly from 11-Jun-2021. American Airlines and United also serve the route;
- Chicago-St Louis: Four times weekly from 11-Jun-2021. American Airlines and United also serve the route;
- Dallas Fort Worth-Nashville: Four times weekly from 10-Jun-2021. American Airlines also serves the route;
- Myrtle Beach-Buffalo: Twice weekly from 11-Jun-2021. The route is unserved;
- Myrtle Beach-Portland: Weekly from 12-Jun-2021. The route is unserved;
- Orlando-Rochester: Three times weekly from 20-May-2021. The route is unserved;
- Philadelphia-Portland: Four times weekly from 13-Jul-2021. American Airlines also serves the route;
- Philadelphia-Providence: Three times weekly from 12-Jul-2021. American Airlines also serves the route;
- Miami-Montego Bay: Three times weekly from 28-May-2021. American Airlines also serves the route.
Route competition data is provided by OAG.