Linear inches: A few airlines have linear inch restrictions for carry-on baggage, meaning the airline gives one number for ...

Southwest also charges $125 per bag for oversize bags between 63 inches and the maximum size of 80 inches; a $100 per bag fee for overweight bags between 51 and 70 pounds; and a $125 per bag fee ...

Similar to checked bag size restrictions ... a carry-on suitcase when flying with the following airlines: Frontier, Southwest and Sun Country. However, if you're shopping for new carry-on luggage ...