Flagstaff is known to receive visitors, especially during the winter part of the year. First of all, you need to keep in mind that there are two main highways that go into the town center, one from Phoenix (I-17) and another from Las Vegas (I-40).Also, you cannot be allowed to rent a car in Flagstaff unless you are at least 21 years old. Generally, the traffic is normal, and you won't have a hard time traveling here. Search rental cars on KAYAK