About ¼ or a fourth of the way, you can stop at Hafnarfjordur, Iceland. This is about 18 minutes northeast of Vogar.
About ⅓ or a third of the way, you can stop at Kopavogur, Iceland. This is about half an hour northeast of Vogar.
If you drive straight through without stopping at all, the total distance is 83 km. The distances shown above don't include local roads to get into each town, so if you're planning a long road trip, make sure you factor in traffic and road conditions, rest stop breaks, and interesting detours along the way. If you're in a rush, you can do the trip with zero stops, and your total travel time would be around 1 hour, 6 minutes.