Dangerous objects not allowed in the cabin
No knives of any length, or made from any material, are permitted in the cabin of an aircraft. (Plastic knives are permitted for meal services.) Cutting instruments of every kind are banned, including but not limited to, carpet knives, box cutters, knives with folding or retractable blades (regardless of blade length), steak knives, straight edge razors, ice picks, and metal scissors with pointed tips. Other prohibited items include lighters, baseball bats, golf clubs, pool cues, ski poles, and hockey sticks.

Medically necessary needles and syringes are exempt from these prohibitions if passengers have in their possession prescription medication with a professionally printed label that identifies the medical office, pharmacy, or manufacturer of the medication.

Prohibited cabin items
The use of devices that prevent customers from reclining their aircraft seats is prohibited. Engineering test show that these devices can hinder passengers from exiting their seats in an emergency, and can cause damage to tray tables.

Hazardous materials
Articles listed in the Department of Transportation's Hazardous Material Regulations and/or the IATA Dangerous Goods Regulations are restricted. These will only be accepted subject to advance arrangements and compliance with regulations.

For safety reasons, dangerous goods may not be packed in checked or carry-on baggage or taken on board with you. Restricted articles include but are not limited to:

• Lighters
• Lighter fluid
• Acid
• Explosives
• Flammable solids/liquids
• Oxidizing materials
• Corrosive materials
• Compressed gases
• Poisons
• Etiologic agents
• Radioactive materials
• Irritating or incapacitating sprays
• Mercury
• Noxious materials
• Briefcases and attaché cases with installed alarm devices

Contact United for more information about hazardous materials.