United has said that they will "exit several unprofitable markets in April."

As a result, they will end service to PAP (Port-au-Prince, Haiti), CUR (Willemstad, Curacao) and DRT (Del Rio, Texas). They are also eliminating flights in the following markets, although they will continue to serve the spoke cities shown below from other hub markets.

EWR-PHL (Philadelphia)
ORD-SJU (San Juan, Puerto Rico)
IAD-MHT (Manchester, N.H.)
IAD-PNS (Pensacola, Fla.)
IAH-CID (Cedar Rapids, Iowa)
LAX-TUL (Tulsa, Okla.)

These changes are clearly financial, as United states "In general, we are making the changes due to the financial performance of the flights and our continuing efforts to put the right aircraft in the right market to meet customer demand."