The majority of persistent hiccups are caused by injury or irritation to either the vagus or phrenic nerve. The vagus and phrenic nerves control the movement of your diaphragm. These nerves may be affected by: irritation of your eardrum, which may be caused by a foreign object. throat irritation or soreness.
For flights to/from the US, most airlines operate on a 'two piece' system - you can have two pieces of luggage checked, each weighing up to about 70lbs. For flights in the rest of the world, most airlines operate on a weight system. Coach class passengers are limited to a maximum weight of 20kg/44lbs in total.
I will use maximum take-off weights. Here is data for two of the most popular commercial airliners: Boeing 737-800 has a max take-off weight of ~75 tons (Boeing 737). Boeing 747-400 has a max take-off weight of ~450 tons (Boeing 747).