Originally Posted by
pineappley

This is so disappointing. I'm Columbus-based and was flying this route 1-2x/monthly due to a family situation in New Jersey. I was previously spending 400/flight to make these trips. I won't be able to drive to Cleveland or Cincinnati so I guess it's time to start saving up again!

Thanks for posting this, I hadn't heard of it yet.
WN also sells CMH-MDW-PHL for $115 one-way. Ever since WN discontinued PHL-CMH nonstop, it has been generous on the CMH to PHL with a connection in MDW fares, and similarly with PIT service with a connection in MDW. This might have made it difficult for F9 via TTN as even though it was offering a nonstop, the connection choices via PHL from WN were relatively low fare and multiple frequency daily.
You could probably do CMH-BWI on WN, and then take Amtrak up also. It should be less than $400 all in as well.
But, WN is charging $102 WGA lowest getaway for CMH-BWI in January and February. I remember Southwest used to sell short-haul flights out of BWI for much less.