Takeoffs from unlisted and alternate airports: Domestic and flag operations

This regulation sets the conditions under which Part 121 pilots can take off from airports not specifically listed in their airline's operations specifications.

For unlisted airports, pilots must verify four things: the airport is adequate for the aircraft, they can meet operating limitations, proper dispatch procedures were followed, and weather meets minimums. If the airport has published takeoff minimums (found in Part 97 for U.S. airports or local authority requirements abroad), use those. Otherwise, default minimums are 800-foot ceiling with 2 miles visibility, 900 feet with 1½ miles, or 1,000 feet with 1 mile visibility.

For alternate airports (where you've diverted), you can only depart if weather meets the specific minimums listed in your airline's operations specifications for alternates—typically more restrictive than standard takeoff minimums.

This ensures safety when operating from airports outside your airline's normal route structure.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*