Class B, C, D, E2 Airspace for Drone Pilots: What They Me...

Table of Contents

1. The Six Airspace Classes at a Glance
2. Class A: The Unreachable Ceiling
3. Class B: Major Airport Airspace
4. Class C: Mid-Size Airport Airspace
5. Class D: Towered Airport Airspace
6. Class E: The Complex One
7. Class G: Uncontrolled Airspace
8. How to Read Airspace on Sectional Charts
9. UAS Facility Maps Explained
10. Authorization Requirements by Class
11. Airspace Decision Flowchart
12. FAQ
13. Summary

The Six Airspace Classes at a Glance {#overview}

The FAA divides the entire National Airspace System (NAS) into six classes, designated A through E for controlled airspace and G for uncontrolled airspace. Each class has different rules, different dimensions, and different authorization requirements for drone operations.

Class	Altitude Range	Controlled?	Drone Authorization Required?
A	18,000 ft MSL to FL600	Yes	Effectively prohibited for small UAS
B	Surface to 10,000 ft MSL (varies)	Yes	LAANC or FAA authorization required
C	Surface to 4,000 ft AGL (typically)	Yes	LAANC or FAA authorization required
D	Surface to 2,500 ft AGL (typically)	Yes	LAANC or FAA authorization required
E	Various configurations	Yes (if surface)	LAANC required for E-surface areas
G	Surface to where Class E begins	No	No airspace authorization needed

Legal basis: 14 CFR Part 107, Subpart B (Operating Rules), specifically 14 CFR 107.41 (Operation in certain airspace).

Class A: The Unreachable Ceiling {#class-a}

Class A airspace extends from 18,000 ft MSL to 60,000 ft MSL (Flight Level 600). All aircraft operating in Class A must be under Instrument Flight Rules (IFR) with ATC clearance.

For drone pilots: Class A is effectively irrelevant. Part 107 limits operations to 400 ft AGL (14 CFR 107.51(b)), which is far below the 18,000 ft MSL floor of Class A. You will never encounter Class A under standard Part 107 operations.

Class B: Major Airport Airspace {#class-b}

Class B airspace surrounds the busiest airports in the United States — airports like JFK, LAX, ORD (Chicago O'Hare), ATL, and DFW. There are approximately 37 Class B airports nationwide.

Shape: Class B is often described as an "upside-down wedding cake." It typically consists of multiple layers of increasing diameter at higher altitudes, extending from the surface up to 10,000 ft MSL. Chart identification: Solid blue lines on sectional charts. Drone authorization: LAANC authorization is required before operating in Class B airspace. The UAS Facility Map (UASFM) for Class B airports shows approved altitude grids — many cells near the airport core may show 0 ft (no drone operations permitted). Cells farther from the airport may allow 50, 100, or 200 ft AGL.
Important: Even with LAANC authorization, you are limited to the altitude ceiling shown on the UASFM grid cell for your specific location. If the UASFM shows 0 ft, you cannot fly there through LAANC — you would need to apply for Further Coordination, which is a manual FAA review process.
Class C: Mid-Size Airport Airspace {#class-c}
Class C airspace surrounds airports with a control tower and radar approach control that serve both commercial and general aviation traffic. There are approximately 120 Class C airports.
Shape: Two concentric cylinders — an inner circle (typically 5 nautical mile radius, surface to 4,000 ft AGL) and an outer ring (10 nautical mile radius, 1,200 ft AGL to 4,000 ft AGL). Chart identification: Solid magenta lines on sectional charts.
Class D: Towered Airport Airspace {#class-d}
Class D airspace surrounds airports that have an operating control tower but lack radar approach control. There are approximately 500 Class D airports.
Shape: Typically a single cylinder from the surface up to 2,500 ft AGL, with a radius of approximately 4 nautical miles. Chart identification: Dashed blue lines on sectional charts.
Class E: The Complex One {#class-e}
Class E is the most complex airspace class because it exists in multiple configurations. The critical distinction for drone pilots is whether Class E extends to the surface.
Class E Surface (E2)
Class E surface areas exist around airports that have instrument approach procedures but no operating control tower. The "surface" designation means this controlled airspace starts at ground level.
Chart identification: Dashed magenta lines on sectional charts. Drone authorization: LAANC authorization is required for Class E surface areas. These appear on UAS Facility Maps.
Class E Above 700 ft AGL
In many areas, Class E begins at 700 ft AGL (charted as the magenta vignette — a fading magenta border). Since Part 107 limits you to 400 ft AGL, this type of Class E does not require separate drone authorization for operations at or below 400 ft AGL, because you are in Class G below 700 ft.
Class E Above 1,200 ft AGL
In less developed areas, Class E begins at 1,200 ft AGL. The area from the surface to 1,200 ft is Class G. Again, at 400 ft AGL, you are well within Class G.
Practical takeaway: Only Class E surface areas (dashed magenta lines) require LAANC authorization. The other Class E configurations start above your 400 ft AGL ceiling, so the airspace at your operating altitude is Class G.
Class G: Uncontrolled Airspace {#class-g}
Class G is uncontrolled airspace — it is any airspace not designated as Class A, B, C, D, or E. For drone pilots, this is the most operationally permissive airspace.
Key rules in Class G:
• No airspace authorization required for operations at or below 400 ft AGL
• All other Part 107 rules still apply (400 ft AGL altitude limit, 3 statute miles visibility, 500 ft below / 2,000 ft horizontal cloud clearance, 100 mph speed limit)
• Remote ID requirements apply regardless of airspace class (14 CFR Part 89)
Where to find Class G: Rural areas, areas between airports, and anywhere that Class B/C/D/E surface does not exist below the floor of overlying Class E.
Bottom line: If you are in Class G airspace, below 400 ft AGL, with 3 statute miles visibility and proper cloud clearance, you can fly without requesting any airspace authorization.
How to Read Airspace on Sectional Charts {#sectional-charts}
Sectional aeronautical charts are the standard for identifying airspace. Here is how to decode the key features for drone operations:
Feature	Chart Symbol	Meaning for Drone Pilots
Solid blue line	Class B boundary	LAANC required
Solid magenta line	Class C boundary	LAANC required
Dashed blue line	Class D boundary	LAANC required
Dashed magenta line	Class E surface boundary	LAANC required
Magenta vignette (fading border)	Class E starts at 700 ft AGL	Class G below 700 ft — no auth at 400 ft
No shading	Class E starts at 1,200 ft AGL or higher	Class G below — no auth at 400 ft
UAS Facility Maps Explained {#uasfm}
UAS Facility Maps (UASFMs) are FAA-published grid maps that show the maximum approved altitude for automated LAANC authorization near participating airports.
How to read a UASFM:
• Each grid cell shows a number (0, 50, 100, 200, 300, or 400)
• That number is the maximum altitude in feet AGL you can receive automatic LAANC approval for
• 0 means no automated approval — you must apply for Further Coordination
• Grid cells farther from the airport core generally have higher ceilings
UASFM data portal: https://udds-faa.opendata.arcgis.com/
Authorization Requirements by Class {#auth-requirements}
Airspace Class	Authorization Method	Processing Time	Notes
Class B	LAANC (up to UASFM ceiling)	Near-instant	0 ft cells = Further Coordination
Class C	LAANC (up to UASFM ceiling)	Near-instant
Class D	LAANC (up to UASFM ceiling)	Near-instant	Most permissive grids
Class E Surface	LAANC (up to UASFM ceiling)	Near-instant	Dashed magenta on chart
Class E (700+ ft)	None needed at 400 ft	N/A	You are in Class G below 700 ft
Class G	None needed	N/A	All other Part 107 rules apply
Class A	N/A	N/A	Unreachable under Part 107
Further Coordination: If you need to fly above the UASFM grid ceiling, or in a 0 ft grid cell, you can request Further Coordination through LAANC. This is a manual FAA review that typically takes days to weeks for a decision.
Airspace Decision Flowchart {#decision-flowchart}
Step 1: Check your location on a sectional chart or B4UFLY. Step 2: Is it Class B, C, D, or E surface?
• YES → Go to Step 3
• NO (Class G) → Fly. No airspace authorization required. Follow all Part 107 rules.
Step 3: Check the UASFM grid for your location.
• Grid ceiling > 0 ft → Request LAANC authorization through a LAANC-approved app. Authorization is near-instant if your altitude is at or below the grid ceiling.
• Grid ceiling = 0 ft → Apply for Further Coordination (manual FAA review, days to weeks).
Step 4: Receive LAANC approval → Fly within the approved altitude and time window.
FAQ {#faq}
Can I fly in Class G without any authorization?
Yes. Class G is uncontrolled airspace. No airspace authorization is needed for Part 107 operations at or below 400 ft AGL. All other Part 107 rules (visibility, cloud clearance, speed, Remote ID) still apply.
What happens if I fly in controlled airspace without LAANC?
You are in violation of 14 CFR 107.41. The FAA can impose civil penalties of up to $27,500 per violation and suspend or revoke your Remote Pilot Certificate.
How do I know if I am in Class E surface or regular Class E?
Look at the sectional chart. Class E surface areas are indicated by dashed magenta lines. If you see a fading magenta vignette (not a dashed line), that indicates Class E starting at 700 ft AGL — at 400 ft you are in Class G.
Does LAANC work 24/7?
LAANC authorization requests can be submitted at any time, but the actual approval is tied to the hours during which the facility airspace is active. Some Class D airports have part-time towers — when the tower closes, the airspace may revert to Class E or G.
What is Further Coordination?
Further Coordination is a manual FAA review process for flights that exceed the UASFM grid ceiling or are in 0 ft grid cells. It is requested through LAANC providers, but unlike standard LAANC, it is not instant. Processing time ranges from days to weeks.
Summary {#summary}
The US airspace system is structured and consistent once you understand the six classes. For Part 107 drone pilots, the practical decision comes down to two questions: (1) Am I in controlled airspace (B, C, D, or E surface)? and (2) What does the UASFM grid allow at my location?
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Disclaimer: This article is for informational purposes only and does not constitute legal advice. MmowW / Sawai Gyoseishoshi Office is not a law firm. Regulations change — always verify current rules at faa.gov/uas and ecfr.gov before flight.
References
1. 14 CFR Part 107 — Small Unmanned Aircraft Systems: https://www.ecfr.gov/current/title-14/chapter-I/subchapter-F/part-107
2. FAA UAS Portal: https://www.faa.gov/uas
3. UAS Facility Maps (UASFM): https://udds-faa.opendata.arcgis.com/
4. B4UFLY App: https://b4ufly.aloft.ai/
5. FAA LAANC Information: https://www.faa.gov/uas/getting_started/laanc
6. FAA Airspace Information: https://www.faa.gov/air_traffic/technology/nextgen/

Related Articles

• LAANC Authorization: How to Fly in Controlled Airspace
• Flying Near Airports: The Ultimate Drone Operator's Airspace Decision Guide
• Temporary Flight Restrictions (TFRs) for Drone Pilots
• Part 107 Waivers: Which Rules You Can Waive and How to Apply
• Remote ID (Part 89): What Every Drone Pilot Must Know
📝 Update History
• 2026-05-13 — Initial publication
⚠️ Disclaimer
This article is for informational purposes only and does not constitute legal or regulatory advice. Drone regulations change frequently — always verify current requirements directly with FAA. MmowW provides compliance assistance tools and is not a substitute for professional advice where required.
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