Frontier is discontinuing DEN-MDW in favor of DEN-ORD.

However, TTN and presumably ILG seasonally will remain with service to MDW. It's anyone guess, but would the strategy for MDW be for Frontier to keep it or close it?, and if kept possibly just unserved airports that Southwest, Delta and others at MDW don't currently serve?

I'm surprised it'd offer ILG-MDW again, when it could probably squeeze in ILG-ORD 2x weekly instead seasonally in the summer. I believe there are more hotels around ORD so it'd offer more options for the ILG leisure crowd during the summer. Plus if it offers TTN-MDW, ILG-ORD is more a differentation and might be preferred for the Chicago suburban crowd that prefer ORD.

I'd think the gate at MDW holds value nonetheless so I'd be somewhat surprised if Frontier leaves MDW even if consolidation has benefit. If Frontier keeps some MDW service, it can be ideal for residents in downtown Chicago moreso than those heading into Chicago.

I'd think maybe it could offer MDW-UST, and if it gets a gate at MIA, maybe MDW-MIA, so some destinational Florida spots for Chicago residents, along with MDW-TTN. Lastly, if it can get a slot pair at JFK, it could offer MDW-JFK which is unserved from Southwest, JetBlue or other network carriers.