Kristi Noem told a congressional panel that 81% of travelers already have IDs that comply with the REAL ID requirements.

New leeway around the May 7 deadline ensures you can still board a domestic flight, but you'll be subject to additional security measures.

U.S. Homeland Security Secretary Kristi Noem said air travelers starting Wednesday who do not have enhanced ID cards may face enhanced security procedures but will not be denied access to flights.