Definition
Airports identified during preflight planning as suitable landing options if the planned destination becomes unreachable or unsafe due to weather, mechanical issues, fuel state, or other in-flight changes. Contingency airports are selected in addition to any legally required alternate, and are chosen along or near the planned route so they can be reached with available fuel and within the aircraft's capability.
Plain English
Backup airports a pilot picks before the flight in case something changes and the original destination is no longer a good choice.
Context Anchor
Used during preflight planning for an instrument flight rules flight, especially when reviewing weather, fuel, route options, and possible changes before departure.
Derivation
Contingency comes from the Latin contingere, meaning 'to happen' or 'to befall.' A contingency is something that might happen but isn't certain. A contingency airport is one chosen for a 'what if' situation, not the planned landing.
Why Pilots Care
Meeting contingency airport requirements keeps the flight legal under fuel regulations and provides real safety margins during instrument conditions.
Intuition Check
Do not assume a contingency airport is always the same thing as the legally required alternate airport. A contingency airport is any suitable backup airport the pilot has considered for a possible change of plan.
Example Sentence 1
During preflight, she identified two contingency airports along her route in case thunderstorms blocked her path to the destination.
Example Sentence 2
When low ceilings developed at the destination, the crew diverted to the nearest contingency airport identified during preflight.