Various types of heat exchangers are used to exchange heat between two fluids with different temperatures in many engineering applications including space heating, air-conditioning, power production, waste recovery, chemical processing and such. Compact and highly efficient heat exchangers are needed especially for aircraft applications due to many restrictions. Heat exchangers working in aircraft should have higher performance than those working in other applications. Two types of heat exchangers having same size were analyzed and compared through experiment. One is plate fin type heat exchanger and the other is fin tube heat exchanger. Plate fin type exchanger has higher performance than fin tube type one and it is concluded that plate fin type heat exchanger is suitable for aircraft application.