Glossary
Dead-Leg
Definition: A dead-leg (or empty leg) is a flight segment that an aircraft must operate without revenue passengers, typically a repositioning flight. In commercial aviation, it can also refer to heavily discounted fares on underbooked segments.
Dead-legs occur when aircraft need to be repositioned between airports for operational reasons. In private aviation, this creates empty flights that charter companies sell at steep discounts — sometimes 50–75% off normal charter prices.
In commercial aviation, the concept is slightly different. Airlines sometimes have flights that are heavily underbooked in premium cabins, particularly on the “weak” direction of a route (e.g., business class from a leisure destination back to a business hub). These flights often have deeply discounted consolidator fares available.
BookMyBusinessClass agents monitor these directional pricing imbalances to find exceptional business class deals. Flying in the off-peak direction on popular routes can yield dramatic savings. For example, business class from Asia to the US is often significantly cheaper than the reverse direction during certain seasons.