It looks like GRR-DCA has been pulled from the booking engine.

This route was doomed from the very beginning. I never understood why Frontier thought they could profitably serve a third-tier business market flying a large Airbus jet only 3x weekly. And to start the route in the dead of winter with a late evening arrival from in DCA/early morning departure from DCA.

I've heard MSN-DCA has only done marginally better than GRR. Perhaps with a better flight schedule and smaller aircraft this route can hang on a bit longer.

It's quite obvious Frontier doesn't know how to utilize their DCA slot portfolio. And they want the DOT to give them slots for SDF and COS.

Part of me says that Frontier should simply pull the remaining point-to-point flying from MKE, MCI, and OMA. With some of the poor decisions Frontier's market analysts have made over the past year, I really wonder if they want what remains of the former Midwest route network to actually work. It would be far better for them to focus on making DEN and COS successful.