How far is Chattanooga TN to Johnson City TN?

about 220 miles

1. Take I-75 NORTH, from Chattanooga to I-40 EAST to ASHEVILLE at EXIT 84A.
2. Take I-40 EAST to I-81 NORTH to BRISTOL at EXIT 421, via I-640 EAST to bypass KNOXVILLE (EXIT 385 off I-40 to get onto I-640 EAST).
3. Take I-81 NORTH to I-26 EAST to JOHNSON CITY at EXIT 57A.
4. Take I-26 EAST to Johnson City.