Intro: Long queues are frustrating, but the causes are predictable.
1. Staff shortages
Airports often run with reduced teams.
2. Peak travel times
Early mornings and evenings are busiest.
3. Extra checks
Random bag searches slow the line.
4. Unprepared passengers
Liquids and laptops cause delays.
5. When to arrive early
Busy airports recommend 2–3 hours.
Summary: Most long queues come from staffing and peak travel times.