After an uneven rollout that left many scrambling for Department of Motor Vehicles appointments ahead of the long-anticipated enforcement of REAL ID, air travel across the US went smoothly Wednesday — with many passengers opting to use their passports and officials ushering people without REAL IDs to separate lines for enhanced screening.

State government offices that issue driver's licenses and state IDs have seen a significant increase in demand for REAL ID and some have extended their office hours to meet the de