Question

1. Turn right, and you can go to the airport.
2. Turn right, you can get to the airport.
[Which expression is grammatical?]

Answer 1

#1 is ok
#2 is a run-on sentence, or a comma splice.

compound sentences (almost always) require a comma

Answer 2

3. Turn right, and you can get to the airport.

What is the difference between #1 and #3?
Are both okay?