The maximum weight allowed for checked luggage on most domestic flights is typically 50 pounds.

The maximum linear dimension allowed for checked luggage on most domestic flights is typically 62 inches.

The standard checked baggage fees for major domestic airlines are typically $30 for the first bag and $40 for the second bag.

Lithium batteries, explosives, and firearms are all prohibited in checked luggage.

Liquids and gels in checked luggage must be in containers of 3.4 ounces or less and must be in clear, quart-sized bags.

Electronic devices in checked luggage must be turned off and must be in a protective case.

Perishable food items are not allowed in checked luggage and food items must be in airtight containers.

Fragile items in checked luggage must be packed in a hard-sided suitcase and must be wrapped in bubble wrap.

Valuables should not be packed in checked luggage and should be insured.

Live animals are not allowed in checked luggage and must be in a pet carrier.

Oversized or overweight luggage may be subject to additional fees and may be refused.

Restrictions on checked luggage on international flights may vary depending on the airline and destination, and may include weight limits, size limits, and prohibited items.

The best practices for packing checked luggage include packing light and avoiding overpacking, using a sturdy suitcase with wheels, and packing items in layers and using packing cubes.

Tips for avoiding checked baggage fees include packing light and avoiding overweight luggage, considering using a carry-on bag instead of a checked bag, and looking for airlines that offer free checked baggage.

Violating checked luggage restrictions may result in additional fees or refusal to transport the luggage.