Ticketing
Before you even get to the airport, a few terms shape how your trip goes if something goes wrong. Open jaw means flying into one city and out of another — efficient for multi-city trips but narrower on rebooking options. Skiplagging is booking a connection with the intent to exit at the layover city for a lower fare — airlines can penalize repeat use and may void other segments.
Groundside — Before Security
Overweight or extra bags trigger fees and slow the check-in process. Real ID verification without a standard ID requires additional screening and significant extra time. Knowing the difference between prohibited and restricted items prevents delays at the checkpoint. Secondary screening — marked SSSS — means a pat-down, explosive swab test, and possible questioning.
Boarding
Equipment change means your aircraft has been swapped — seats can shift and departure typically delays by 45 minutes or more. Crew timeout means the crew reached its legal duty limit and cannot operate the flight without replacement. Gate hold means you are aboard but waiting at the gate for clearance. Out of service usually leads to a cancellation — open your airline app immediately.
Inflight and Landing
A go-around is an aborted landing attempt — standard and safe. A holding pattern means the aircraft circles while waiting for clearance. A diversion means landing somewhere other than the destination. Once an emergency is declared, the flight will return or divert to the nearest suitable airport.
Deplaning and Show Stoppers
Gate occupied means another plane is still at your gate and you wait on the taxiway. Involuntary bump means you are denied boarding on an oversold flight. A ground stop pauses all departures to a destination. An airspace closure grounds all aircraft in the affected airspace — an extremely rare event that changes everything.