Purpose: To achieve the balancing of interests between airlines and passengers, the dynamic refund fee model is designed, which meets the interests of both airlines and passengers.Design/methodology/approach: In the study, the expectation utility function is constructed respectively for passengers and airlines, and the equilibrium point of the two is chosen to solve the passenger refund fee. Then, a dynamic refund fee model based on refund time and real-time sales revenue is proposed according to the actual operating conditions of the flight.Findings:The results show that refund fee is negatively related to three variables, the ticket price, the probability of ticket sales and the probability of refund. Besides, The maximum payment limit is the airline single seat cost or the actual fare paid below it, and the lowest can be exempt.Originality/value: A better standard of the rufund is proposed. The refund mode breaks the traditional static charging mode, and charges different refund fees to passengers for different refund time and the real time income of flights. Comparing with the current refund policy, the new charge of refund fee could best meets the interests of both parties.a refund fee standard.