Why don't American passenger airlines operate dedicated cargo flights any more?
Alaska Airlines, Hawaiian Airlines still have dedicated freighters.

American, Delta, Southwest and United all have thriving cargo shipping operations, but as far as I can tell, no longer have freighters.


https://www.aacargo.com
https://www.alaskaair.com/content/cargo/general
https://www.deltacargo.com
https://www.hawaiianaircargo.com
https://www.swacargo.com


Alaska used to run 737 Combi to ship cargo and passengers in the main cabin on their “Milk Run” up the Alaskan panhandle. They now have dedicated freighters to handle the cargo.


https://thepointsguy.com/2017/10/final-flight-alaska-airlines-737-400-combi/


Good luck shipping your parcel.