Some airlines utilize line bidding where a pilot selects a “line” – an entire month's worth of flying and days off while others utilize a preferential bidding system (PBS), such as NavBlue, where pilots elect certain preferences (weekends off, less morning flying, overnights in a certain city, etc.).

Airline pilots do not have the freedom to choose their own hours in the way a freelancer might; instead, their schedules are determined by a complex "bidding" system based on seniority. At most major airlines, pilots "bid" each month for their preferred routes, flight times, and days off. Those with the most years at the company get their first choices, while junior pilots are often assigned "reserve" shifts, where they must be on call to cover for sick colleagues or delayed flights. While a senior Captain might successfully bid for a schedule that mimics a 9-to-5 or a specific four-day-on, three-day-off pattern, the majority of pilots must be highly flexible. All schedules are strictly governed by aviation authorities (like the FAA or EASA) to ensure pilots do not exceed maximum flight time limits—typically 100 hours per month or 1,000 hours per year—and receive mandatory rest periods to prevent fatigue.