For 2026 air travel, the list of items strictly prohibited in checked luggage is primarily focused on fire safety and hazardous materials. The most critical items that cannot be in a checked bag are spare lithium batteries and power banks, as these pose a "thermal runaway" risk that is much easier to manage in the cabin than in the cargo hold. Similarly, electronic cigarettes and vapes must be carried on your person or in your hand bag. Flammable liquids and solids, such as gasoline, lighter fluid, strike-anywhere matches, and "torch" lighters, are completely banned from the aircraft. Highly "reactive" items like bleach, pool chemicals, and strong acids are also forbidden. Interestingly, valuable items such as jewelry, cash, and essential medications are strongly discouraged from being checked, as the airline’s liability for lost or damaged luggage is limited and does not usually cover high-value electronics or sentimental items. For 2026, travelers should also be aware that "Smart Luggage" with non-removable lithium batteries is barred from the cargo hold. Always ensure your checked bag is free of these hazards to avoid your bag being held by security or, worse, causing an emergency during your flight.