The deadline to comply with new federal security standards has been extended to October 1, 2021. Real ID graphic from Maryland MVA

On that date, a Real ID compliant driver's license or ID card will be necessary to board commercial aircraft in the United States. Maryland residents can check their Real ID compliance using the Real ID Lookup Tool provided by Maryland Motor Vehicle Administration (MDOT MVA). 

In the video below, from a media event at BWI Marshall Airport in late 2019, MDOT MVA Administrator Chrissy Nizer describes a scenario of a passenger attempting to travel without a REAL ID after the implementation deadline.

For full details on Real ID, visit the MDOT MVA website or TSA website