{
    "code": "452",
    "title": "Air Transportation, Nonscheduled",
    "sic_manual": "OSHA SIC Manual",
    "level": "Industry group",
    "major_group_code": "45",
    "parent_code": "45",
    "parent_title": "Transportation by Air",
    "plain_english_definition": "SIC 452 - Air Transportation, Nonscheduled is an SIC industry group within SIC 45 - Transportation by Air. It groups SIC 4522 - Air Transportation, Nonscheduled.\n\nUse SIC 452 when referring to this industry group as a whole. When the establishment's specific activity is known, use the appropriate 4-digit SIC industry within the group.",
    "summary_plain": "",
    "official_definition": "",
    "official_source": "https://www.osha.gov/data/sic-manual/major-group-45",
    "classification_note": "",
    "included_activities": [],
    "excluded_activities": [
        {
            "label": "Air Transportation, Scheduled, and Air Courier",
            "code": "451",
            "title": "Air Transportation, Scheduled, and Air Courier",
            "url": "https://siccode.com/sic-code/451/air-transportation-scheduled-air-courier"
        },
        {
            "label": "Airports, Flying Fields, and Airport Terminal",
            "code": "458",
            "title": "Airports, Flying Fields, and Airport Terminal",
            "url": "https://siccode.com/sic-code/458/airports-flying-fields-airport-terminal"
        }
    ],
    "confused_codes": [],
    "official_siblings": [
        {
            "code": "451",
            "title": "Air Transportation, Scheduled, and Air Courier",
            "url": "https://siccode.com/sic-code/451/air-transportation-scheduled-air-courier",
            "label": "Industry group"
        },
        {
            "code": "452",
            "title": "Air Transportation, Nonscheduled",
            "url": "https://siccode.com/sic-code/452/air-transportation-nonscheduled",
            "label": "Industry group"
        },
        {
            "code": "458",
            "title": "Airports, Flying Fields, and Airport Terminal",
            "url": "https://siccode.com/sic-code/458/airports-flying-fields-airport-terminal",
            "label": "Industry group"
        }
    ],
    "official_children": [
        {
            "code": "4522",
            "title": "Air Transportation, Nonscheduled",
            "url": "https://siccode.com/sic-code/4522/air-transportation-nonscheduled",
            "label": "Industry"
        }
    ],
    "related_naics_codes": [
        {
            "code": "4812",
            "title": "Nonscheduled Air Transportation",
            "url": "https://siccode.com/naics-code/4812/nonscheduled-air-transportation"
        },
        {
            "code": "4879",
            "title": "Scenic and Sightseeing Transportation, Other",
            "url": "https://siccode.com/naics-code/4879/scenic-sightseeing-transportation"
        }
    ],
    "example_companies": [
        {
            "name": "Air Methods Corp",
            "url": "https://siccode.com/business/air-methods-corp",
            "city": "Englewood",
            "state": "CO",
            "reviewed": false
        },
        {
            "name": "Bristow Group Inc",
            "url": "https://siccode.com/business/bristow-group-inc",
            "city": "Houston",
            "state": "TX",
            "reviewed": false
        },
        {
            "name": "Era Group Inc",
            "url": "https://siccode.com/business/era-group-inc",
            "city": "Houston",
            "state": "TX",
            "reviewed": false
        },
        {
            "name": "Acs Inc",
            "url": "https://siccode.com/business/acs-inc",
            "city": "Sandy",
            "state": "UT",
            "reviewed": false
        },
        {
            "name": "Omni Energy",
            "url": "https://siccode.com/business/omni-energy-3",
            "city": "Carencro",
            "state": "LA",
            "reviewed": false
        },
        {
            "name": "Siller Bros. Inc",
            "url": "https://siccode.com/business/siller-bros-inc",
            "city": "Yuba City",
            "state": "CA",
            "reviewed": false
        },
        {
            "name": "Hyannis Air Service Inc",
            "url": "https://siccode.com/business/hyannis-air-service-inc",
            "city": "Hyannis",
            "state": "MA",
            "reviewed": false
        },
        {
            "name": "Haverfield Corp",
            "url": "https://siccode.com/business/haverfield-corp",
            "city": "Gettysburg",
            "state": "PA",
            "reviewed": false
        },
        {
            "name": "South Coast Helicopters",
            "url": "https://siccode.com/business/south-coast-helicopters",
            "city": "Fullerton",
            "state": "CA",
            "reviewed": false
        },
        {
            "name": "HeliQwest International U.S. Headquarters",
            "url": "https://siccode.com/business/heliqwest-international-u-s-headquarters",
            "city": "Broomfield",
            "state": "CO",
            "reviewed": false
        },
        {
            "name": "Tempus Jets",
            "url": "https://siccode.com/business/tempus-jets",
            "city": "Scottsdale",
            "state": "AZ",
            "reviewed": false
        }
    ],
    "company_count": 801,
    "email_contact_count": 370,
    "phone_count": 515,
    "website_count": 597,
    "database_as_of": "Nov 13, 2026",
    "count_type": "commercial",
    "count_disclaimer": "These are SICCODE.com commercial database counts, not official government establishment totals. Website-Reviewed & Enriched is a separate review of company websites for products, services, markets, and fit.",
    "canonical_url": "https://siccode.com/sic-code/452/air-transportation-nonscheduled",
    "json_url": "https://siccode.com/sic-code/452.json",
    "reviewed_by": "Industry Classification Review Team",
    "last_updated": "October 2026"
}