Minimum safe altitudes14 CFR 91.119 Minimum safe altitudes: General
Except when necessary for takeoff or landing, you must always be high enough to make an emergency landing without undue hazard to people or property if a power unit fails. On top of that, fly at least 1,000 feet above the highest obstacle within 2,000 feet over congested areas, at least 500 feet above the surface over other areas, and no closer than 500 feet to any person, vessel, vehicle or structure over open water or sparsely populated areas.
By the ATIS Alerts team · Updated October 15, 2026 · Regulation text current as of October 14, 2026. A study aid based on the official regulation text, not legal advice or an FAA interpretation.
At a glance
- Anywhere: an altitude that allows, if a power unit fails, an emergency landing without undue hazard to persons or property on the surface (a).
- Over a congested area of a city, town or settlement, or over an open air assembly of persons: 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft (b).
- Over other than congested areas: 500 feet above the surface (c).
- Over open water or sparsely populated areas: no closer than 500 feet to any person, vessel, vehicle or structure (c).
- Helicopters, powered parachutes and weight-shift-control aircraft may go below some of these minimums if the operation is without hazard to persons or property on the surface (d).
In plain English
Section 91.119 sets the lowest altitudes you may fly, except when necessary for takeoff or landing. The first rule, paragraph (a), applies everywhere and has no number: you must be high enough that if a power unit fails you can make an emergency landing without undue hazard to people or property on the surface.
Paragraphs (b) and (c) add minimums based on what is below you. Over a congested area of a city, town or settlement, or over an open air assembly of persons, you must be 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft. Over other than congested areas the minimum is 500 feet above the surface.
Over open water or sparsely populated areas the rule changes shape. Instead of a height above the surface, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle or structure. The section does not define "congested area" or "sparsely populated" with numbers.
Paragraph (d) gives exceptions to some aircraft when the operation is conducted without hazard to persons or property on the surface. A helicopter may fly below the minimums in (b) or (c) if it complies with any routes or altitudes the FAA prescribes for helicopters, and a powered parachute or weight-shift-control aircraft may fly below the minimums in (c).
Common mistakes
- Treating 500 or 1,000 feet as always enough. Paragraph (a) applies everywhere, so the altitude needed to reach a safe emergency landing can be higher than the numbers in (b) or (c).
- Measuring the congested-area rule from the ground. It is 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet (b).
- Reading the open water rule as 500 feet above the surface. Over open water or sparsely populated areas it is a 500-foot distance from any person, vessel, vehicle or structure (c).
The official text
14 CFR 91.119 as published on the eCFR, current as of October 14, 2026.
Except when necessary for takeoff or landing, no person may operate an aircraft below the following altitudes:
(a) Anywhere. An altitude allowing, if a power unit fails, an emergency landing without undue hazard to persons or property on the surface.
(b) Over congested areas. Over any congested area of a city, town, or settlement, or over any open air assembly of persons, an altitude of 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft.
(c) Over other than congested areas. An altitude of 500 feet above the surface, except over open water or sparsely populated areas. In those cases, the aircraft may not be operated closer than 500 feet to any person, vessel, vehicle, or structure.
(d) Helicopters, powered parachutes, and weight-shift-control aircraft. If the operation is conducted without hazard to persons or property on the surface—
(1) A helicopter may be operated at less than the minimums prescribed in paragraph (b) or (c) of this section, provided each person operating the helicopter complies with any routes or altitudes specifically prescribed for helicopters by the FAA; and
(2) A powered parachute or weight-shift-control aircraft may be operated at less than the minimums prescribed in paragraph (c) of this section.
Test yourself
Practice questions from our free FAA written test prep that cite 14 CFR 91.119.
Recreational Pilot
Except when necessary for takeoff or landing, what is the minimum safe altitude over a congested area?
- A. 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft.
- B. 500 feet above the surface.
- C. 1,000 feet above the surface.
- D. 2,000 feet above the highest obstacle within a horizontal radius of 1,000 feet.
Show answer
A. 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft. Over congested areas: 1,000 feet above the highest obstacle within 2,000 feet horizontally. Over other than congested areas: 500 feet AGL, and over open water or sparsely populated areas you need only stay 500 feet from any person, vessel, vehicle, or structure.
More Recreational Pilot practice →Commercial Pilot
During agricultural aircraft operations under part 137, the operator must:
- A. hold an agricultural aircraft operator certificate and take precautions for persons and property on the surface.
- B. operate only under an air carrier certificate.
- C. remain above 500 feet AGL at all times.
- D. file a flight plan for each dispensing flight.
Show answer
A. hold an agricultural aircraft operator certificate and take precautions for persons and property on the surface. Part 137 has its own operator certificate. It permits the low-altitude flying that dispensing requires, an explicit exception to the 91.119 minimum safe altitudes, while imposing duties toward people and property below.
More Commercial Pilot practice →Private Helicopter
A helicopter may be operated below the minimum altitudes that apply to fixed-wing aircraft provided:
- A. it is conducted without hazard to persons or property on the surface, complying with any routes or altitudes prescribed by the FAA.
- B. the pilot holds a commercial certificate.
- C. the flight remains within a Class G surface area.
- D. a VFR flight plan has been filed and activated.
Show answer
A. it is conducted without hazard to persons or property on the surface, complying with any routes or altitudes prescribed by the FAA. This is the helicopter exception in 91.119(d): the 500- and 1,000-foot minimums of 91.119(b) and (c) do not bind helicopters that operate without hazard and follow any FAA-prescribed routes or altitudes. 91.119(a), an altitude allowing an emergency landing without undue hazard, still applies. It is an operational allowance, not a license to buzz.
More Private Helicopter practice →
Questions pilots ask
How low can you fly over a city?
Over a congested area of a city, town or settlement, the minimum is 1,000 feet above the highest obstacle within a horizontal radius of 2,000 feet of the aircraft (91.119(b)), and you must also be high enough to make an emergency landing without undue hazard if a power unit fails (91.119(a)).
How low can you fly over open water or sparsely populated areas?
The aircraft may not be operated closer than 500 feet to any person, vessel, vehicle or structure (91.119(c)). The emergency landing rule in 91.119(a) still applies.
Does the 500-foot rule apply during takeoff and landing?
Not when it is necessary for takeoff or landing. The minimums in 91.119 apply except when necessary for takeoff or landing (opening sentence of 91.119).