---
kind: "unit"
title: "14"
title_heading: "Aeronautics and Space"
key: "chI/subchG/part121/subpartR"
level: "subpart"
label: "Subpart R"
heading: "Flight Time Limitations: Flag Operations"
release: "ecfr-current"
date: "2026-08-27"
url: "https://uscodex.org/cfr/14/chI-subchG-part121-subpartR"
sections_count: 9
---

# Subpart R — Flight Time Limitations: Flag Operations

Title 14 C.F.R. — Aeronautics and Space › Chapter I — Federal Aviation Administration, Department of Transportation › Subchapter G — Air Carriers and Operators for Compensation or Hire: Certification and Operations › Part 121 — Operating Requirements: Domestic, Flag, and Supplemental Operations

## Sections

- [§121.480. Applicability.](/cfr/14/121.480.md)
- [§121.481. Flight time limitations: One or two pilot crews.](/cfr/14/121.481.md)
- [§121.483. Flight time limitations: Two pilots and one additional flight crewmember.](/cfr/14/121.483.md)
- [§121.485. Flight time limitations: Three or more pilots and an additional flight crewmember.](/cfr/14/121.485.md)
- [§121.487. Flight time limitations: Pilots not regularly assigned.](/cfr/14/121.487.md)
- [§121.489. Flight time limitations: Other commercial flying.](/cfr/14/121.489.md)
- [§121.491. Flight time limitations: Deadhead transportation.](/cfr/14/121.491.md)
- [§121.493. Flight time limitations: Flight engineers and flight navigators.](/cfr/14/121.493.md)
- [§121.495. Fatigue risk management system.](/cfr/14/121.495.md)