The main alternative to the train on the interstate highway. Southwest Airlines has a number of flights, low price, on time service, speed, are the high-speed vehicles can not reach, so the threat of substitutes is weak.

Main substitutes are intercontinental train on the highway. Southwest Airlines has a flight number, low prices, fast service, on time, etc, are all high-speed motor vehicle cannot be reached, so the threat of substitutes.

The main substitute is on the intercontinental highway train.Southwestern Airlines has the scheduled flight number of times many, the price low, the service punctual, the speed quick and so on the merits, all is the high-speed car is unable to arrive, therefore the substitute threat is weak.

Trains on the main alternatives are Interstate Highway. Southwest Airlines has a number of flights, low price, on time, the advantages of speed, cannot be reached by high-speed cars, so threat of substitutes and weak.

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