Compare official labels, inclusions, exclusions, examples, hierarchy, mappings, and practical fit notes.
Use this group for the broader activity area of passenger air transport, including Passenger air transport. Open the child codes when a more specific code is needed.
Use this group for the broader activity area of freight air transport and space transport, including Freight air transport and Space transport. Open the child codes when a more specific code is needed.
Use this class for passenger air transport when the main activity includes Scheduled air transport of passengers over regular routes and Charter flights for passengers. Check exclusions and nearby codes before applying it to a mixed activity.
Use this division for air transport when the main activity includes Passenger air transport and Freight air transport and space transport. Check exclusions and nearby codes before applying it to a mixed activity.
A short checklist before choosing one code over another.
These codes share H TRANSPORTATION AND STORAGE > 51 Air transport before they diverge.
51.1, 51.2, 51.10 already list another compared code as related or often confused.
51.10, 51 include official exclusions that may point to a better-fitting code.
| Comparison field | 51.1 | 51.2 | 51.10 | 51 |
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| Official title | Passenger air transport | Freight air transport and space transport | Passenger air transport | Air transport |
| Plain-language summary | Use this group for the broader activity area of passenger air transport, including Passenger air transport. Open the child codes when a more specific code is needed. | Use this group for the broader activity area of freight air transport and space transport, including Freight air transport and Space transport. Open the child codes when a more specific code is needed. | Use this class for passenger air transport when the main activity includes Scheduled air transport of passengers over regular routes and Charter flights for passengers. Check exclusions and nearby codes before applying it to a mixed activity. | Use this division for air transport when the main activity includes Passenger air transport and Freight air transport and space transport. Check exclusions and nearby codes before applying it to a mixed activity. |
| Official inclusions | Not stated separately in available source data | Not stated separately in available source data |
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| Official exclusions | Not stated separately in available source data | Not stated separately in available source data |
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| Usually not this code |
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| Parent hierarchy | H TRANSPORTATION AND STORAGE > 51 Air transport > 51.1 Passenger air transport | H TRANSPORTATION AND STORAGE > 51 Air transport > 51.2 Freight air transport and space transport | H TRANSPORTATION AND STORAGE > 51 Air transport > 51.1 Passenger air transport > 51.10 Passenger air transport | H TRANSPORTATION AND STORAGE > 51 Air transport |
| Rev. 2 mapping |
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