Not to be confused with the Australian grocery company Milkrun.
Transportation route or easy military mission
A milk run, milk round, or milk route is the fixed route taken to pick up milk from dairy farmers, or to deliver milk to consumers, as part of a milk delivery system. In extended usage, it may be a transportation service that has many stops. Metaphorically, it may be a slow or tedious trip, a military air mission posing little danger, or any circular route.
Dairy use
Milk runs are documented in the American Upper Midwest as early as 1917, where it was a train that made frequent stops to pick up farmers' milk cans for shipment to local dairies for processing and bottling.
It may also be the route used to distribute full milk bottles and collect empties by a milkman. The route may be sold by one milkman to another.
Transportation
In scheduled passenger airline or rail travel, a milk run may involve a trip with many stops, and more generally a slow, tedious trip. It may also be an uneventful trip.
Military
Originally from United States Army Air Corps and Royal Air Force aircrews in World War II, a milk run was typically used to refer as a mission posing little danger, the mission could be either a bombing run or a convoy on secured routes (i.e Highway 1 in Vietnam).
Commercial aviation
In the airline industry, a "milk run" is a multi-stop, regularly scheduled passenger flight operated with a single aircraft. Current examples include:
↑Meusel, Winfrid (1995): Realisierung eines Logistikberater-Arbeitsplatzes für das Frachtkostencontrolling mit wissensbasierten Elementen. Nürnberg, Univ., Diss.--Erlangen, 1995. Frankfurt am Main, Berlin: Lang (Europäische Hoch-schulschriftenReihe 5, Volks- und Betriebswirtschaft, 1755).