Dynamic pricing is the practice of dynamically calculating the price of a product or service in order to incorporate real-time market conditions, input costs, and/or competitive perspectives. Dynamic pricing which is based on marginal costing, is used by airlines and many other organisations.
Marginal cost is the cost of producing an additional unit of output. Marginal Costing is a costing technique wherein the marginal cost, i.e. variable cost is charged to units of cost, while the fixed cost for the period is completely written off against the contribution.