Easily walkable. Come out of Terminal A on the arrivals (baggage claim) level and turn left.. walk past the taxi stand, keep going and you'll come to an intersection with a traffic light. Cross the street and turn left, the Hyatt is right down the road. It's maybe a 10 minute walk and has sidewalks/proper crossings the entire way. When I stay here, I virtually never take the shuttle, it's fine to walk as long as you're travelling light.