Why is dry ice not allowed on planes?

Dry ice sublimates to gaseous C02at aircraft environment temperatures. Excessive C02in the aircraft can cause aircrew incapacitation. Dry ice is generally carried aboard aircraft to keep food (galley or cargo), medicine, or biological materials in a frozen or chilled condition.



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IF TRANSPORTING IN THE PASSENGER COMPARTMENT OR TRUNK OF A VEHICLE, LIMIT DRY ICE TO SMALL QUANTITIES AND OPEN ALL WINDOWS OR ENSURE CONSTANT SUPPLY OF FRESH AIR FOR THE DURATION OF THE TRIP. IMPROPERLY DISPOSED DRY ICE CAN CREATE A HAZARDOUS ATMOSPHERE, CAN POSE THREATS TO HUMANS AND ANIMALS, AND CAN ATTRACT INSECTS.

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Frozen liquid items and gel packs are allowed through the checkpoint as long as they are frozen solid when presented for screening. If frozen liquid items are partially melted, slushy, or have any liquid at the bottom of the container, they must meet 3-1-1 liquids requirements.

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Foods you can't pack in your carry-on
Think: creamy cheeses, liquid chocolate, liquid coffee, creamy dips and spreads, gravy, honey, hummus, ice cream, jam, jelly, juice, syrup, peanut butter, salad dressing, sauce, salsa, soda, soup and yogurt.

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