Read this tip to make your life smarter, better, faster and wiser. LifeTips is the place to go when you need to know about Airline Baggage Restrictions and other Luggage topics.
You may have bought the same exact ticket in May that your friend bought earlier in March -- only to find that the two of you are subject to different airline luggage regulations. Why? First, baggage restrictions may have changed. Second, some airlines set different restrictions on each cabin (first class, business or economy).
If you are concerned, call to verify. Other factors include discounts, originating airlines, use of frequent-flier miles.
One final consideration is the cost of airline fuel. Luggage weighs down aircraft and when fuel prices go up, airline luggage weight limits go down.