41 CFR § 301-10.133 - U.S. flag air carrier service.

---
identifier: "/us/cfr/t41/s301-10.133"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "41 CFR § 301-10.133 - U.S. flag air carrier service."
title_number: 41
title_name: "Public Contracts and Property Management"
section_number: "301-10.133"
section_name: "U.S. flag air carrier service."
chapter_number: 301
chapter_name: "TEMPORARY DUTY (TDY) TRAVEL ALLOWANCES"
subchapter_number: "B"
subchapter_name: "ALLOWABLE TRAVEL EXPENSES"
part_number: "301-10"
part_name: "10—TRANSPORTATION EXPENSES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "5 U.S.C. 5704; 5 U.S.C. 5707; 5 U.S.C. 5707, note; 40 U.S.C. 121(c); 49 U.S.C. 40118; Office of Management and Budget Circular No. A-126, revised May 22, 1992, 57 FR 22150."
regulatory_source: "FTR Case 2025-05, 90 FR 56893, Dec. 8, 2025, unless otherwise noted."
cfr_part: "301-10"
---


# 301-10.133 U.S. flag air carrier service.

U.S. flag air carrier service is service provided on an air carrier holding a certificate under 49 U.S.C. 41102 (excluding a foreign air carrier operating under a permit), and which service is authorized by the carrier's certificate or by exemption or regulation. This also includes service provided under a code share agreement with a foreign air carrier in accordance with title 14, Code of Federal Regulations, when the ticket identifies the U.S. flag air carrier's designator code and flight number.