(19, 20), # I2 Houston - Los Angeles
(20, 21), # I2 Los Angeles - Seattle
(20, 22), # I2 Los Angeles - Salt Lake City
(21, 22)] # I2 Seattle - Salt Lake City
(19, 20), # I2 Houston - Los Angeles
(20, 21), # I2 Los Angeles - Seattle
(20, 22), # I2 Los Angeles - Salt Lake City
(21, 22)] # I2 Seattle - Salt Lake City