Ultralight Controlled Airspace

FAR 103.17 — Ultralight Controlled Airspace

FAR 103.17 requires prior ATC authorization before operating an ultralight in Class A, B, C, D, or surface-area Class E airspace. What pilots need to know.

In Plain English

FAR 103.17 restricts where you can fly an ultralight vehicle when controlled airspace is involved. Unlike certificated aircraft, ultralights operate under Part 103 with minimal regulation — but controlled airspace is one place that freedom stops.

Before entering any of the following, you must get prior authorization from the ATC facility with jurisdiction over that airspace:

Class A airspace
Class B airspace
Class C airspace
Class D airspace
The lateral boundaries of the surface area of Class E airspace designated for an airport

"Prior authorization" means you contact ATC and get permission before you operate there — not while you're already inbound. Without that approval, the ultralight must remain clear.

Why it matters: ultralights typically have no transponder, no radio requirement, and limited performance. Mixing them with airline and IFR traffic without coordination would be a serious safety hazard, so ATC needs the chance to plan for it.

Regulation Text

14 CFR § 103.17

§ 103.17 Operations in certain airspace. No person may operate an ultralight vehicle within Class A, Class B, Class C, or Class D airspace or within the lateral boundaries of the surface area of Class E airspace designated for an airport unless that person has prior authorization from the ATC facility having jurisdiction over that airspace. [Amdt. 103-17, 56 FR 65662, Dec. 17, 1991]

Oral Exam Questions a DPE Might Ask

Q1What airspace requires prior ATC authorization before operating an ultralight?

Per FAR 103.17, you need prior authorization from the controlling ATC facility before operating in Class A, B, C, or D airspace, or within the lateral boundaries of the surface area of Class E airspace designated for an airport.

Q2If you want to fly your ultralight through a Class D surface area, what must you do first?

Under FAR 103.17, you must obtain prior authorization from the ATC facility having jurisdiction over that Class D airspace before operating there.

Q3Does FAR 103.17 restrict ultralight operations in Class G or non-surface Class E airspace?

No. FAR 103.17 only addresses Class A, B, C, D, and the surface area of Class E designated for an airport; it does not require ATC authorization for Class G or other Class E airspace.

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Related Sections in Part 103

§ 103.1

Ultralight Vehicle Applicability

§ 103.11

Ultralight Daylight Operations