Each centimeter on the map represents 300 miles. What is the approximate distance between San Francisco International Airport and Kansas City International Airport along the red route?

1,200 miles
1,500 miles
1,800 miles
18,000

The approximate distance between San Francisco International Airport and Kansas City International Airport along the red route would be 1,800 miles.

This is calculated by taking the approximate distance on the map (6 cm) and then multiplying it by the scale factor of 300 miles per centimeter (6 cm x 300 miles = 1,800 miles).