Definition
A change of route during a flight to land at an airport other than the one originally planned, made in response to weather, mechanical issues, fuel concerns, passenger needs, or other operational factors that make continuing to the intended destination unwise or impractical.
Plain English
Choosing to land somewhere other than where you originally intended, because something has changed and going to the planned airport is no longer the best choice.
Context Anchor
Seen in flight planning, scenario-based training, cross-country flying, and in-flight decision-making when weather, fuel, aircraft condition, passenger needs, or time pressure changes the plan.
Derivation
From the Latin 'divertere', meaning 'to turn aside.' In flying, the pilot turns aside from the planned route to a different airport.
Why Pilots Care
A timely, well-planned diversion prevents fuel exhaustion or arrival at an unsuitable airport and keeps the flight safe.
Intuition Check
Do not read diversion as only an emergency. In aviation, a diversion can be a planned, calm change of destination or route whenever continuing the original plan is not the best choice.
Example Sentence 1
Faced with a line of thunderstorms blocking the route, the pilot elected to make a diversion to a nearby airport.
Example Sentence 2
During the scenario, the student performed a diversion when headwinds increased fuel burn beyond what was planned for the original destination.