answer:“Most flights originating from the US have a ‘two piece’ limit for luggage – you can check two bags, and you pay extra per bag. This applies whether the flight is domestic within the US or international. Most flights that originate from outside the US have a weight limit for total checked baggage – a miserly 20kg/44lbs if you’re traveling in coach class, 30kg/66lbs for business class and 40kg/88lbs for first class. If your luggage weighs more than your allowance, you’ll be charged for each extra pound (or kilogram) at exorbitant rates – usually a percentage (about 1% – 2%) of the full fare per extra kg of weight, per flight. This is a major massive difference in luggage policies. Although sometimes you might find it cheaper to buy an international ticket from the US to another country, and then a second ticket for travel within that foreign country, or for travel on to other countries, if you do this, your second ticket will probably restrict your luggage to 44lbs, and the cost of the extra weight of luggage you have with you could well be much more than the saving on the ticket to start with. An empty suitcase weighs 15–20lbs. If you’re traveling with two suitcases, you’ll use up most of your 44lb limit just on the empty bags!” Source