Tweet from @FrontierCare in reply to customer inquiring about GRB-MKE and MSP-MKE flights being cancelled:
A detailed analysis of all Frontier flights has proven that we have been sustaining significant losses on many of our MKE flights, and as such we have had to adjust our November scheduling.
The changes we are making now will result in a stronger MKE operation.
When will there be a press release or announcement about the cutbacks?
The cancellation notices are just beginning to be sent out; the delay in notifications could leave travelers in the lurch, unless they are soon made aware of the cancellations. The longer Frontier waits, the more angry customers there will be.
Customers need to have enough notice, so they are able to make alternate plans.